cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Structural, magnetic and transport properties in the Pr-doped manganites La0.9-xPrxTe0.1MnO3
Creators: name: Yang, J.
name: Song, W. H.
name: Ma, Y. Q.
name: Zhang, R. L.
name: Zhao, B. C.
name: Sheng, Z. G.
name: Zheng, G. H.
name: Dai, J. M.
name: Sun, Y. P.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The effect of Pr-doping on structural, magnetic and transport properties in electron-doped manganites La0.9-xPrxTe0.1MnO3 with fixed carrier concentration are investigated. The room temperature structural transition from rhombohedral (R3C) to orthorhombic (Pbnm) symmetry is found in the samples with by the Rietveld refinement of x-ray powder diffraction patterns. The Curie temperature of samples decreases and the transition becomes broader with increasing Pr-doping level. For the samples with, there exist insulator-metal (I-M) transition. And the low-temperature I-M transition is observed at about 66K for the sample with x = 0.36, which may be related to the opening of a new percolation channel. For the samples with, r(T) curves display the semiconducting behavior (dρ/dT < 0) in both high-temperature PM phase and low-temperature FM phase. The results are discussed in terms of the increased bending of the Mn-O-Mn bond with decreasing the average ionic radius of the A-site element and the tolerance factor, resulting in the narrowing of the bandwidth, the decrease of the mobility of electrons and the weakening of DE interaction caused by the substitution of smaller Pr3+ ions for larger La3+ ion.
description: 25 pages, 8 figures, submitted to Phys.Rev.B
Convolvulaceae in the Serra da Canastra National Park, Minas Gerais, Brazil
Creators: name: Kojima, Roberta Keyla
name: Simões, Ana Rita Giraldes
name: Simão-Bianchini, Rosangela
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 310411
subject: Plant and fungus systematics and taxonomy

description: Dataset: map, plant illustrations and photographs, pollen grain Scanning electron micrographs, map .kml archive.
Cotton Sector Policies and Performance in Sub-Saharan Africa: Lessons Behind the Numbers in Mozambique and Zambia
Creators: name: Boughton, Duncan
name: Tschirley, David L.
name: De Marrule, Higino Francisco
name: Osorio, Afonso
name: Zulu, Ballard
name: Boughton, Duncan
name: Tschirley, David L.
name: De Marrule, Higino Francisco
name: Osorio, Afonso
name: Zulu, Ballard
Publisher: name: Unknown
Year: 2002
Subjects: subject: Crop Production/Industries
subject: food security
subject: food policy
subject: cotton
subject: Mozambique
subject: Zambia

description: This paper examines the experience of Mozambique and Zambia, whose contrasting policy approaches and performance appear to challenge concerns that liberalization inevitably leads to the collapse of input systems for crops like cotton. First these countries are placed in context by providing a brief empirical overview of the performance of cotton sectors in seven SSA countries of Southern, Eastern, and West Africa. The authors then focus on Mozambique and Zambia, reviewing their differing initial conditions at the outset of reform, the divergent policies that each has put in place, and their relative performance. It conclude that a simple policy choice between liberalization or regulated monopoly is not sufficient for either cotton sector to achieve desired performance in the absence of rural input and credit markets, and identify the elements of joint public/private strategies necessary to improve performance in each country.
description: Research results from SIMA-Department of Statistics and Department of Policy Analysis MADER-Directorate of Economics
Additional file 1 of Critical appraisal of clinical practice guidelines for the management of COVID-19: protocol for a systematic review
Creators: name: Dhivagaran, Thanansayan
name: Abbas, Umaima
name: Butt, Fahad
name: Arunasalam, Luckshann
name: Chang, Oswin
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Science Policy
subject: 60506 Virology
subject: FOS: Biological sciences

description: Additional file 1. Preferred Reporting Items for Systematic Review and Meta-Analysis Protocols 2015 Statement (PRISMA-P checklist): contains items that are required to be reported in a systematic review protocol.
The effects of inhomogeneities on the cosmology of type IIB conifold transitions
Creators: name: Palti, Eran
name: Saffin, Paul
name: Urrestilla, Jon
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper we examine the evolution of the effective field theory describing a conifold transition in type IIB string theory. Previous studies have considered such dynamics starting from the cosmological approximation of homogeneous fields, here we include the effects of inhomogeneities by using a real-time lattice field theory simulation. By including spatial variations we are able to simulate the effect of currents and the gauge fields which they source. We identify two different regimes where the inhomogeneities have opposite effects, one where they aid the system to complete the conifold transition and another where they hinder it. The existence of quantized fluxes in related systems has lead to the speculation that (unstable) string solutions could exist, using our simulations we give strong evidence that these string-like defects do not form.
description: 11 pages, 2 figures. Published version
Novel Features in 2D and 3D Neutral, Cationic, and Anionic Gold Clusters Au_{5 \leq n \leq 8}^Z (Z = 0, \pm)
Creators: name: Remacle, F.
name: Kryachko, E. S.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Atomic and Molecular Clusters (physics.atm-clus)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: Low-energy structures are found on the potential energy surfaces of the neutral, cationic, and anionic gold clusters Au_{5 \leq n \leq 8}^Z (Z = 0, \pm) and on the neutral potential energy surface of Au_9. These structures provide insights on the 2D - 3D transition in small neutral and charged gold clusters. Two metastable long-lived dianions of gold clusters are reported as well.
description: 26 pages, 5 figures
Pulsar radio emission mechanisms: a critique
Creators: name: Melrose, D. B.
name: Rafat, M. Z.
name: Mastrano, A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We consider critically the three most widely favored pulsar radio emission mechanisms: coherent curvature emission (CCE), beam-driven relativistic plasma emission (RPE) and anomalous Doppler emission (ADE). We assume that the pulsar plasma is one dimensional (1D), streaming outward with a bulk Lorentz factor $γ_{\rm s} \gg \langle γ\rangle -1 \gtrsim 1$, where $\langle γ\rangle $ is the intrinsic spread in the rest frame of the plasma. We argue that the formation of beams in a multi-cloud model is ineffective in the intrinsically relativistic case for plausible parameters, because the overtaking takes too long. We argue that the default choice for the particle distribution in the rest frame is a J{ü}ttner distribution and that relativistic streaming should be included by applying a Lorentz transformation to the rest-frame distribution, rather than the widely assumed relativistically streaming Gaussian distribution. We find that beam-driven wave growth is severely restricted by (a) the wave properties in pulsar plasma, (b) a separation condition between beam and background, and (c) the inhomogeneity of the plasma in the pulsar frame. The growth rate for the kinetic instability is much smaller and the bandwidth of the growing waves is much larger for a J{ü}ttner distribution than for a relativistically streaming Gaussian distribution. No reactive instability occurs at all for a J{ü}ttner distribution. We conclude that none of CCE, RPE and ADE in tenable as the generic pulsar radio emission mechanism for ``plausible'' assumptions about the pulsar plasma.
description: Accepted for publication (MNRAS)
Observation of $\psp$ decays to $ρ(770)π$ and $ρ(2150)π$
Creators: name: BES Collaboration
name: Ablikim, M.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: \pspto ρπis observed for the fisrt time in a data sample of 14M \psp decays collected by the BESII detector at BEPC. The branching fraction is measured to be \BR(psptoρπ)=(5.1+-0.7+-0.8)10-5, where the first error is statistical and the second one is systematic. A high mass excited ρstate wirh mass around 2.15GeV/c2 is also observed wirh \BR(pspto ρ(2150)π) \ra pi+pi-pi0) =(19.4+-2.5+11.2-2.1)10-5. The branching fraction of \pspto pi+pi-pi0 is measued with improved precision, \BR(\pspto pi+pi-pi0)=(18.1+-1.8+-1.9)10-5. The results may shed light on the understanding of the longstanding "\rhopi puzzle" between \jpsi and \psp hadronic decays.
description: 5 pages, 3figures
Produção e Comercialização de Culturas Alimentares: Que Expectativas para o Presente Ano? O Ponto de Vista dos Comerciantes Rurais de Pequena Escala no Norte e Centro de Moçambique.
Creators: name: Weber, Michael T.
name: Weber, Michael T.
Publisher: name: Unknown
Year: 2002
Subjects: subject: Crop Production/Industries
subject: food security
subject: food policy
subject: Mozambique

description: This flash edition brings some results on assessment of rural small-scale traders’ expectations and other relevant information about the current agricultural season harvest and trade. It was found that: 1) most of the traders in the Central and Northern regions expect lower maize harvest than in the same period of last year; 2) for cassava, traders in the Northern region expect higher harvests, while the Central region traders expect lower harvests than the last year; 3) the prices in the period of the survey were lower than in the same period last year; 4) the lower farm-gate prices, associated with inflation in general prices, had reduced the financial power of the farmers.
description: Resultados das Investigações do SIMA-Dest e Departamento de Análise de Políticas MADER-Direcção de Economia
Additional file 2 of Critical appraisal of clinical practice guidelines for the management of COVID-19: protocol for a systematic review
Creators: name: Dhivagaran, Thanansayan
name: Abbas, Umaima
name: Butt, Fahad
name: Arunasalam, Luckshann
name: Chang, Oswin
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Science Policy
subject: 60506 Virology
subject: FOS: Biological sciences

description: Additional file 2. Sample MEDLINE search for COVID-19 Clinical Practice Guidelines executed using the OVID interface: contains sample search strategy on MEDLINE database.
Market Information: A Low Cost Tool for Agricultural Market Development?
Creators: name: Mabota, Anabela
name: Arlindo, Pedro
name: Paulo, Antonio M.
name: Donovan, Cynthia
name: Mabota, Anabela
name: Arlindo, Pedro
name: Paulo, Antonio M.
name: Donovan, Cynthia
Publisher: name: Unknown
Year: 2003
Subjects: subject: Marketing
subject: FOS: Economics and business
subject: food security
subject: food policy
subject: agricultural market development
subject: Mozambique

description: Since 1991, the Ministry of Agriculture and Rural Development (MADER) of Mozambique, through the Agricultural Market Information System (SIMA) has collected, processed and disseminated weekly information regarding prices of basic commodities at different market transaction levels. This information has been used by different actors in the market, including producers, traders, NGOs, consultants, and policy makers. SIMA has made efforts to serve multiple users, from the private and public sectors, using a variety of means of communication, thereby contributing to the development of agricultural markets. However, in a time of budget constraints, there is one important question: What is the value of investing in public market information as is currently done in Mozambique? This is discussed in this paper.
description: Results of Researchs from SIMA-DEST and Department of Policies Analysis MADER-Directorate of Economics
Study of some mechanical properties for composite material consist of phenol formaldehyde resin reinforced by Kevlar fibers
Creators: name: I.Al-Mosawi, Ali
name: T.Albdiry, Mushtaq
Publisher: name: figshare
Year: 2020
Subjects: subject: 91202 Composite and Hybrid Materials
subject: FOS: Materials engineering

description: The objective of this research is to study the effect of changed the reinforcement percentage by fibers on Mechanical properties for composite material consist of phenol formaldehyde resin reinforced by biaxial kevlar fibers (0°-90°) with (485g/cm3) density which included impact strength , tensile strength , and hardness where we extracted the Mechanical properties for phenol formaldehyde resin before reinforced by fibers, then we reinforced the resin by different weight percentage from Kevlar Fibers(20%,40%,60%) and studied its effect on the above Mechanical Properties as illustrated in the diagrams.
Physicochemical models: source-tailored or generic?
Creators: name: Kulterer, Beatrice M.
name: Drozdovskaya, Maria N.
name: Coutens, Audrey
name: Manigand, Sébastien
name: Stéphan, Gwendoline
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Physicochemical models can be powerful tools to trace the chemical evolution of a protostellar system and allow to constrain its physical conditions at formation. The aim of this work is to assess whether source-tailored modelling is needed to explain the observed molecular abundances around young, low-mass protostars or if, and to what extent, generic models can improve our understanding of the chemistry in the earliest stages of star formation. The physical conditions and the abundances of simple, most abundant molecules based on three models are compared. After establishing the discrepancies between the calculated chemical output, the calculations are redone with the same chemical model for all three sets of physical input parameters. With the differences arising from the chemical models eliminated, the output is compared based on the influence of the physical model. Results suggest that the impact of the chemical model is small compared to the influence of the physical conditions, with considered timescales having the most drastic effect. Source-tailored models may be simpler by design; however, likely do not sufficiently constrain the physical and chemical parameters within the global picture of star-forming regions. Generic models with more comprehensive physics may not provide the optimal match to observations of a particular protostellar system, but allow a source to be studied in perspective of other star-forming regions.
Cosmology and Nonlinear Supersymmetric General Relativity
Creators: name: Shima, Kazunari
name: Tsuda, Motomu
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We discuss cosmological implications of nonlinear supersymmetric(NLSUSY) general relativity(GR) of the form of Einstein-Hilbert(EH) action for empty spacetime, where NLSUSY GR is obtained by the geomtrical arguments on new spacetime just inspired by NLSUSY. The new action of NLSUSY GR is unstable and breaks down spontaneously to EH action with Nambu-Goldstone(NG) fermion matter. We show that NLSUSY GR elucidates the physical meanings of the cosmologically important quantities, e.g., the spontaneous SUSY breaking scale, the cosmological constant, the dark energy and the neutrino mass and describe natually the paradigm of the accelerated expansion of the present universe.
description: 8 pages, Latex, Based on the talk given by K. Shima at International Europhysics Conference on High Energy Physics, July 21st-27th, 2005, Lisboa, Portugal
Anomalous thermodynamic properties of quantum critical superconductors
Creators: name: Khodas, Maxim
name: Dzero, Maxim
name: Levchenko, Alex
Publisher: name: arXiv
Year: 2020
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Recent high-precision measurements employing different experimental techniques have unveiled an anomalous peak in the doping dependence of the London penetration depth which is accompanied by anomalies in the heat capacity in iron-pnictide superconductors at the optimal composition associated with the hidden antiferromagnetic quantum critical point. We argue that finite temperature effects can be a cause of observed features. Specifically we show that quantum critical magnetic fluctuations under superconducting dome can give rise to a nodal-like temperature dependence of both specific heat and magnetic penetration depth in a fully gapped superconductor. In the presence of line nodes in the superconducting gap fluctuations can lead to the significant renormalization of the relative slope of $T$-linear penetration depth which is steepest at the quantum critical point. The results we obtain are general and can be applied beyond the model we use.
description: 13+ pages, 6 figures
Bohr-Sommerfeld quantization and meson spectroscopy
Creators: name: Brau, Fabian
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We use the Bohr-Sommerfeld quantization approach in the context of constituent quark models. This method provides, for the Cornell potential, analytical formulae for the energy spectra which closely approximate numerical exact calculations performed with the Schrodinger or the spinless Salpeter equations. The Bohr-Sommerfeld quantization procedure can also be used to calculate other observables such as r.m.s. radius or wave function at the origin. Asymptotic dependence of these observables on quantum numbers are also obtained in the case of potentials which behave asymptotically as a power-law. We discuss the constraints imposed by these formulae on the dynamics of the quark-antiquark interaction.
description: 13 pages
A Informação: Alavanca de Baixo Custo para o Desenvolvimento dos Mercados Agrários?
Creators: name: Mabota, Anabela
name: Arlindo, Pedro
name: Paulo, Antonio M.
name: Donovan, Cynthia
name: Mabota, Anabela
name: Arlindo, Pedro
name: Paulo, Antonio M.
name: Donovan, Cynthia
Publisher: name: Unknown
Year: 2003
Subjects: subject: Marketing
subject: FOS: Economics and business
subject: food security
subject: food policy
subject: agricultural market development
subject: Mozambique

description: Since 1991, the Ministry of Agriculture and Rural Development (MADER) of Mozambique, through the Agricultural Market Information System (SIMA) has collected, processed and disseminated weekly information regarding prices of basic commodities at different market transaction levels. This information has been used by different actors in the market, including producers, traders, NGOs, consultants, and policy makers. SIMA has made efforts to serve multiple users, from the private and public sectors, using a variety of means of communication, thereby contributing to the development of agricultural markets. However, in a time of budget constraints, there is one important question: What is the value of investing in public market information as is currently done in Mozambique? This is discussed in this paper.
description: Resultados das Pesquisas do SIMA-DEST e Departamento de Análise de Políticas MADER-Direcção de Economia
Relative discrete spectrum of W*-dynamical systems
Creators: name: Duvenhage, Rocco
name: King, Malcolm
Publisher: name: arXiv
Year: 2020
Subjects: subject: Operator Algebras (math.OA)
subject: FOS: Mathematics

description: A definition of relative discrete spectrum of noncommutative W*-dynamical systems is given in terms of the basic construction of von Neumann algebras, motivated from three perspectives: Firstly, as a complementary concept to relative weak mixing of W*-dynamical systems. Secondly, by comparison with the classical (i.e. commutative) case. And, thirdly, by noncommutative examples.
description: 22 pages
Mudanças nos Padrões de Consumo na Zona Sul: Que Opções Alimentares Para as Camadas mais Pobres?
Creators: name: Arlindo, Pedro
name: Mabota, Anabela
name: Paulo, Antonio M.
name: Donovan, Cynthia
name: Tschirley, David L.
name: Arlindo, Pedro
name: Mabota, Anabela
name: Paulo, Antonio M.
name: Donovan, Cynthia
name: Tschirley, David L.
Publisher: name: Unknown
Year: 2004
Subjects: subject: Food Consumption/Nutrition/Food Safety
subject: food security
subject: food policy
subject: Mozambique

description: This study assesses the changes on prices, availability and consumption of corn meal and rice in the main markets in Southern and Central Mozambique. In addition, it discusses the possible determinants of the changes and suggests some policy changes mainly for the low-income consumers.
description: Resultados das Pesquisas do SIMA-DEST e Departamento de Análise de Políticas MADER-Direcção de Economia
Transfer to the continuum and Breakup reactions
Creators: name: Moro, A. M.
name: Nunes, F. M.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Reaction theory is an essential ingredient when performing studies of nuclei far from stability. One approach for the calculation of breakup reactions of exotic nuclei into two fragments is to consider inelastic excitations into the single particle continuum of the projectile. Alternatively one can also consider the transfer to the continuum of a system composed of the light fragment and the target. In this work we make a comparative study of the two approaches, underline the different inputs, and identify the advantages and disadvantages of each approach. Our test cases consist of the breakup of $^{11}$Be on a proton target at intermediate energies, and the breakup of $^8$B on $^{58}$Ni at energies around the Coulomb barrier. We find that, in practice the results obtained in both schemes are in semiquantitative agreement. We suggest a simple condition that can select between the two approaches.
description: 10 pages, 12 figures. Replaced by accepted version. To appear in Nucl. Phys. A
Robust gates for holonomic quantum computation
Creators: name: Florio, G.
name: Facchi, P.
name: Fazio, R.
name: Giovannetti, V.
name: Pascazio, S.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Non Abelian geometric phases are attracting increasing interest because of possible experimental application in quantum computation. We study the effects of the environment (modelled as an ensemble of harmonic oscillators) on a holonomic transformation and write the corresponding master equation. The solution is analytically and numerically investigated and the behavior of the fidelity analyzed: fidelity revivals are observed and an optimal finite operation time is determined at which the gate is most robust against noise.
description: 11 pages, 6 figures
Como Será a Colheita e Comercialização de Culturas Alimentares em Moçambique em 2004/05? Resultados de Algumas Constatações no Centro e Norte de Moçambique.
Creators: name: Equipe Tecnica Do SIMA
name: Equipe Tecnica Do SIMA
Publisher: name: Unknown
Year: 2004
Subjects: subject: Marketing
subject: FOS: Economics and business
subject: food security
subject: food policy
subject: Mozambique

description: This work provides the assessment of rural small-scale traders’ expectations on the levels of harvests and trade. It was found that the 2004/05 agricultural season will not be different from the previous one. It was also found that the market opportunities for staple crops will depend on the effective demand in traditional markets of each crop in the country and in the Southern Africa region as a whole. In general, the nominal and real farm-gate prices are slightly higher than in the last season, and some maize exports to Malawi were already observed from Zambézia, Tete and Niassa provinces.
description: Resultados das Investigações do SIMA-Dest e Departamento de Análise de Políticas MADER-Direcção de Economia
Neutron dominance in excited states of $^{26}$Mg and $^{10}$Be probed by proton and alpha inelastic scattering
Creators: name: Kanada-En'yo, Yoshiko
name: Shikata, Yuki
name: Chiba, Yohei
name: Ogata, Kazuyuki
Publisher: name: arXiv
Year: 2020
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Isospin characters of nuclear excitations in $^{26}$Mg and $^{10}$Be are investigated via proton($p$) and alpha($α$) inelastic scattering. A structure model of antisymmetrized molecular dynamics (AMD) is applied to calculate the ground and excited states of $^{26}$Mg and $^{10}$Be. The calculation describes the isoscalar feature of the ground-band $2^+_1$($K^π=0^+_1$) excitation and predicts the neutron dominance of the side-band $2^+_2$($K^π=2^+$) excitation in $^{26}$Mg and $^{10}$Be. The $p$ and $α$ inelastic scattering off $^{26}$Mg and $^{10}$Be is calculated by microscopic coupled-channel (MCC) calculations with a $g$-matrix folding approach by using the matter and transition densities of the target nuclei calculated with AMD. The calculation reasonably reproduces the observed $0^+_1$, $2^+_1$, and $2^+_2$ cross sections of $^{26}$Mg+$p$ scattering at incident energies $E_p=$24 and 40 MeV and of $^{26}$Mg+$α$ scattering at $E_α=$104 and 120 MeV. For $^{10}$Be+$p$ and $^{10}$Be+$α$ scattering, inelastic cross sections to the excited states in the $K^π=0^+_1$ ground-, $K^π=2^+$ side-, $K^π=0^+_2$ cluster-, and $K^π=1^-$ cluster-bands are investigated. The isospin characters of excitations are investigated via inelastic scattering processes by comparison of the production rates in the $^{10}$Be+$p$, $^{10}$Be+$α$, and $^{10}$C+$p$ reactions. The result predicts that the $2^+_2$ state is selectively produced by the $^{10}$Be+$p$ reaction because of the neutron dominance in the $2^+_2$ excitation as in the case of the $^{26}$Mg+$p$ scattering to the $2^+_2$ state, whereas its production is significantly suppressed in the $^{10}$C+$p$ reaction.
description: 19 pages, 12 figures
Experimental study of the effect of zinc borate on flame retardancy of carbon- Kevlar hybrid fibers reinforced composite materials
Creators: name: A.Al-Jeebory, Abbas
name: I.Al-Mosawi, Ali
name: T.Albdiry, Mushtaq
Publisher: name: figshare
Year: 2020
Subjects: subject: 91202 Composite and Hybrid Materials
subject: FOS: Materials engineering

description: This study aims to investigate possibility to increase the flame retardancy for composite materials by addition of a flame retardant material which represent the zinc borate as a coating layer of (4mm) thickness on the surface of composite material consist of araldite resin reinforced by hybrid fibers from carbon and kevlar fibers as a consecutive layers which be as a woven roving (º 90 - º 0). Then, this system (flame retardant material and composite material) was exposed to a direct flame which generated from oxyacetylene flame (up to 3000ºC) and gas flame (2000ºC) under different exposure distances (10,15, and 20mm), and study the range of resistance of flame retardant material layer to the flames and protected the substrate where we used the method of measuring the surface temperature opposite to the flame where we obtained the better results with large exposed distance and large percentage from protective layer which is zinc borate (30%) for both types of flames , as well as the flame resistance will be increased with decrease the flame temperature .
A comparative reliability analysis of computer-generated bitemark overlays
Creators: name: McNamee, Anne H.
Publisher: name: University of British Columbia
Year: 2009

description: Bitemark evidence is routinely accepted in the judicial system, but with recent United States court rulings such as Daubert and Kubmo an emphasis has been placed on establishing the validity and reliability of current scientific techniques. The current study compares the reliability of two popular methods used to produce computer-generated bitemark overlays. Images of twelve dental casts were sent to thirty examiners. Examiners were instructed to produce an overlay for each cast image based on the instructions provided for the two techniques. After the overlays were submitted, measurements of the area of the biting edge and the x-y coordinate of each tooth's position were obtained. The reliability assessment of the measurements was performed using an analysis of variance and calculation of reliability coefficients. The analysis of variance results showed that the forensic experience level of the examiner and the cast variations all contribute to a significant effect in the variances seen for the area for both techniques. The inter- and mtira-examiner reliability coefficients are low. The results for the positional measurements showed the forensic experience level of the examiner contributes no significant differences to the variances. The differences are seen within the cast variations. The inter- and intra-examiner reliability coefficients are exceptionally high. It was concluded that both techniques were reliable methods to produce bitemark overlays to assess tooth position.
Sample dependence of the structural, vibrational, and electronic properties of a-Si:H: A density-functional-based tight-binding study
Creators: name: Singh, Ranber
name: Prakash, S.
name: Shukla, Nitya Nath
name: Prasad, R.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: The sample dependence of various properties of hydrogenated amorphous silicon ($a$-Si:H) have been studied with 216 silicon atoms and 24 hydrogen atoms using the density functional based tight binding molecular dynamics simulations. The Si-Si and Si-H pair correlation functions are independent of preparation procedure as well as initial conditions, the H-H pair correlation functions are sample dependent. The distribution of hydrogen atoms in all the samples is nonuniform and depends upon the preparation procedure as well as the initial structure from which the hydrogenated amorphous silicon sample is generated. The Si-Si bond length and Si-Si-Si bond angle distributions are nearly independent of sample preparation procedure, but Si-H bond length distributions are sample dependent. The peaks in the vibrational density of states (VDOS) at high frequencies are in reasonable accord with the experimental results. The positions of the high frequency peaks are found to be dependent on the local environment. While the high frequency vibrational modes related to Si-Si bond vibrations are moderately localized, the vibrational modes related to Si-H bond vibrations in $a$-Si:H samples are highly localized. In samples generated from the liquid quench the free energy is smaller, whereas the entropy and specific heat are larger as compared to that of samples generated by hydrogenation of pure amorphous silicon samples. The total electronic density of states and local density of electronic states (LDOS) at Si atom sites are nearly sample independent, while the LDOS at the H atom sites are dependent on the sample preparation procedure.
description: 20 pages, 11 figures, Accepted in Physical Review B
Provenance for Linguistic Corpora Through Nanopublications
Creators: name: Lek, Timo
name: de Groot, Anna
name: Kuhn, Tobias
name: Morante, Roser
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computation and Language (cs.CL)
subject: FOS: Computer and information sciences

description: Research in Computational Linguistics is dependent on text corpora for training and testing new tools and methodologies. While there exists a plethora of annotated linguistic information, these corpora are often not interoperable without significant manual work. Moreover, these annotations might have evolved into different versions, making it challenging for researchers to know the data's provenance. This paper addresses this issue with a case study on event annotated corpora and by creating a new, more interoperable representation of this data in the form of nanopublications. We demonstrate how linguistic annotations from separate corpora can be reliably linked from the start, and thereby be accessed and queried as if they were a single dataset. We describe how such nanopublications can be created and demonstrate how SPARQL queries can be performed to extract interesting content from the new representations. The queries show that information of multiple corpora can be retrieved more easily and effectively because the information of different corpora is represented in a uniform data format.
Deep discovery informs difficult deployment in plant microbiome science
Creators: name: Dangl J.L
name: Russ D
name: Teixeira P.J.P.L
name: Fitzpatrick C.R
Publisher: name: Elsevier B.V.
Year: 2023

description: Plant-associated microbiota can extend plant immune system function, improve nutrient acquisition and availability, and alleviate abiotic stresses. Thus, naturally beneficial microbial therapeutics are enticing tools to improve plant productivity. The basic definition of plant microbiota across species and ecosystems, combined with the development of reductionist experimental models and the manipulation of plant phenotypes with microbes, has fueled interest in its translation to agriculture. However, the great majority of microbes exhibiting plant-productivity traits in the lab and greenhouse fail in the field. Therapeutic microbes must reach détente, the establishment of uneasy homeostasis, with the plant immune system, invade heterogeneous pre-established plant-associated communities, and persist in a new and potentially remodeled community. Environmental conditions can alter community structure and thus impact the engraftment of therapeutic microbes. We survey recent breakthroughs, challenges, and opportunities in translating beneficial microbes from the lab to the field.
An ordoliberal shift? The Biden-Harris Administration's public response to U.S. capitalism in crisis
Creators: name: Daniel Russo
Publisher: name: Guilford Press
Year: 2024

description: In March 2022, President Joseph Biden declared, “Since 1946 we've established a liberal world order...Now is the time when things are shifting, and there’s going to be a new world order out there, and we’ve got to lead it.” Biden was speaking at Business Roundtable’s quarterly meeting, a lobbying group made up exclusively of CEOs. While Biden offered a surprisingly accurate description of the task ahead of the new 'establishment,' he left out the key aspect that it’s more particularly the neoliberal order which emerged in the 1970s that finds itself at an inflection point and, from the perspectives of state and capital, is incentivizing conjunctural transformations. Without this caveat, one isn’t sure what kind of ‘new world order’ the Biden administration wants America to lead, and what it wants to leave behind. Fortunately, in April 2023, we were offered an elaborated vision in the form of a speech on America’s ‘new industrial policy,’ given by the NSA. In this essay, I seek to analyze the rhetoric and objectives offered in this new vision. I show how it challenges neoliberal principles by way of introducing ordoliberal ones. I conclude with a discussion on ordoliberalism’s capitulation to a capitalism and its failure to envision a post-capitalist society.
Analysis of Adult Mortality Within Rural Households in Mozambique and Implication For Policy
Creators: name: Mather, David
name: De Marrule, Higino Francisco
name: Donovan, Cynthia
name: Weber, Michael T.
name: Alage, Albertina
name: Mather, David
name: De Marrule, Higino Francisco
name: Donovan, Cynthia
name: Weber, Michael T.
name: Alage, Albertina
Publisher: name: Unknown
Year: 2004
Subjects: subject: Health Economics and Policy
subject: food security
subject: food policy
subject: Mozambique
subject: AIDS
subject: HIV

description: This paper has four main objectives: 1) To present a cost-effective method of investigating the effect of prime-age mortality on rural households by adding a mortality component to on-going nationally-representative household surveys; 2) to investigate who is afflicted with prime-age mortality due to illness, by analyzing the characteristics of the deceased individuals (gender, age, and position within the household at the time of death) and of the affected households (geographic location, and ex post income and landholding); 3) to investigate how the households with prime-age (PA; 15-49 years of age) adult death or illness respond by adjusting household composition and their agricultural activities; and 4) to discuss the implications of household responses to PA adult death for agricultural policies and programs, and for their role in mitigating the effects of PA adult mortality.
description: Research results from the Department of Policy Analysis, MADER, Directorate of Economics
Validation of oscillometric blood pressure measuring devices : a case study of the BpTRUtm
Creators: name: Mattu, Gurdial Singh
Publisher: name: University of British Columbia
Year: 2009

description: Hypertension is one of the most common reasons why North Americans visit a physician's office and its measurement technique has been reasonably standard since the earliest accepted description of an indirect method of measuring blood pressure by Riva Rocci in 1896. Korotkoff later modified the traditional sphygmomanometer in 1905. However, since then the mercury sphygmomanometer has become not only the gold standard, but also an essential diagnostic tool in everyday medical care. Recently however, there has been growing concern over the accuracy of the measurements obtained and the potential biohazard with standard mercury sphygmomanometers. Many cities and countries in Europe and North America, are in the process of phasing them out. Newer instruments such as the auscultatory aneroid, and the automated electronic devices of which the majority are of the oscillometric type, are beginning to appear. All new devices have the option of undergoing a validation process to assess the accuracy according to the relevant governing bodies. The BpTRU™ is an automated oscillometric electronic blood pressure device developed by VSM Medtech Ltd of Vancouver. Connected in parallel by means of a T-tube, to the current gold standard mercury sphygmomanometer, allowed blood pressures to be measured simultaneously. Two observers blinded from each other and the device, recorded blood pressures individually. The mean observer average was compared to the device mean blood pressures for agreement. This was done according to the American National Standard for Electronic or Automated Sphygmomanometers-1992 and the British Hypertension Society protocol-1993. The validation process was initially conducted in adults and agreement was within the above standards. However the device tended to underestimate at higher systolic blood pressures, so the algorithm was modified and the device re-validated using embedded raw data. After running the validation study in children, which again satisfied the above criteria, the raw data was combined in a final study. The BpTRU™ is the only automated blood pressure measuring device that has been independently validated and has attained a high level of accuracy over this broad age and blood pressure range.
Effective field theory of boson-fermion mixtures and bound fermion states on a vortex of boson superfluid
Creators: name: Nishida, Yusuke
name: Son, Dam Thanh
Publisher: name: arXiv
Year: 2005
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We construct a Galilean invariant low-energy effective field theory of boson-fermion mixtures and study bound fermion states on a vortex of boson superfluid. We derive a simple criterion to determine for which values of the fermion angular momentum l there exist an infinite number of bound energy levels. We apply our formalism to two boson-fermion mixed systems: the dilute solution of He3 in He4 superfluid and the cold polarized Fermi gas on the BEC side of the "splitting point". For the He3-He4 mixture, we determine parameters of the effective theory from experimental data as functions of pressure. We predict that infinitely many bound He3 states on a superfluid vortex with l=-2,-1,0 are realized in a whole range of pressure, 0\sim20 atm, where experimental data are available. As for the cold polarized Fermi gas, while only S-wave (l=0) and P-wave (l=\pm1) bound fermion states are possible in the BEC limit, those with higher negative angular momentum become available as one moves away from the BEC limit.
description: 14 pages, 4 figures, revtex4; typos corrected, references added, version to appear in Phys. Rev. A
Experimental realization of high-fidelity teleportation via non-Markovian open quantum system
Creators: name: Liu, Zhao-Di
name: Sun, Yong-Nan
name: Liu, Bi-Heng
name: Li, Chuan-Feng
name: Guo, Guang-Can
name: Raja, Sina Hamedani
name: Lyyra, Henri
name: Piilo, Jyrki
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Open quantum systems and study of decoherence are important for our fundamental understanding of quantum physical phenomena. For practical purposes, there exists a large number of quantum protocols exploiting quantum resources, e.g. entanglement, which allows to go beyond what is possible to achieve by classical means. We combine concepts from open quantum systems and quantum information science, and give a proof-of-principle experimental demonstration -- with teleportation -- that it is possible to implement efficiently a quantum protocol via non-Markovian open system. The results show that, at the time of implementation of the protocol, it is not necessary to have the quantum resource in the degree of freedom used for the basic protocol -- as long as there exists some other degree of freedom, or environment of an open system, which contains useful resources. The experiment is based on a pair of photons, where their polarizations act as open system qubits and frequencies as their environments -- while the path degree of freedom of one of the photons represents the state of Alice's qubit to be teleported to Bob's polarization qubit.
description: v2: added more experimental results, minor text modifications
Análise da Mortalidade de Adultos Nos Agregados Familiares Rurais em Moçambique e Implicações para Políticas.
Creators: name: Mather, David
name: De Marrule, Higino Francisco
name: Donovan, Cynthia
name: Weber, Michael T.
name: Alage, Albertina
name: Mather, David
name: De Marrule, Higino Francisco
name: Donovan, Cynthia
name: Weber, Michael T.
name: Alage, Albertina
Publisher: name: Unknown
Year: 2004
Subjects: subject: Health Economics and Policy
subject: food security
subject: food policy
subject: Mozambique
subject: AIDS
subject: HIV

description: This paper has four main objectives: 1) To present a cost-effective method of investigating the effect of prime-age mortality on rural households by adding a mortality component to on-going nationally-representative household surveys; 2) to investigate who is afflicted with prime-age mortality due to illness, by analyzing the characteristics of the deceased individuals (gender, age, and position within the household at the time of death) and of the affected households (geographic location, and ex post income and landholding); 3) to investigate how the households with prime-age (PA; 15-49 years of age) adult death or illness respond by adjusting household composition and their agricultural activities; and 4) to discuss the implications of household responses to PA adult death for agricultural policies and programs, and for their role in mitigating the effects of PA adult mortality.
description: Resultados de pesquisa do Departmento de Análise de Políticas, MADER, Direcção de Economia
SHAXSIYAT XUSUSIYATLARINI IFODALOVCHI FRAZEOLOGIK BIRLIKLAR
Creators: name: Tursunova, Nodirabegim
name: Ergasheva, Nargiza
Publisher: name: Zenodo
Year: 2024

description: ushbu maqola frazeologik birliklarning shaxsiyat, intellektual qobiliyat, insonlararo munosabatlar, harakatlar va yashash sharoitlarini ifodalovchi xususiyatlarini tahlil qiladi. Maqolada misollar keltirilgan holda, har bir frazeologik birlikning ma'nosi va ulardan qanday foydalanganligi ko‘rsatib o‘tiladi. Bu birliklar orqali o‘zbek tilining boyligi va ifodalovchi kuchi namoyon bo‘ladi.
Contractor renormalization group theory of the SU($N$) chains and ladders
Creators: name: Li, Peng
name: Shen, Shun-Qing
Publisher: name: arXiv
Year: 2004
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Contractor renormalization group (CORE) method is applied to the SU($N$) chain and ladders in this paper. In our designed schemes, we show that these two classes of systems can return to their original form of Hamiltonian after CORE transformation. Successive iteration of the transformation leads to a fixed point so that the ground state energy and the energy gap to the ground state can be deduced. The result of SU($N$) chain is compared with the one by Bethe ansatz method. The transformation on spin-1/2 ladders gives a finite gap in the excited energy spectra to the ground state in an intuitive way. The application to SU(3) ladders is also discussed.
description: 4 pages, 4 figures, submitted to Phys. Rev. B
Covariant Variational Evolution and Jacobi Brackets: Particles
Creators: name: Ciaglia, Florio M.
name: Di Cosmo, Fabio
name: Ibort, Alberto
name: Marmo, Giuseppe
name: Schiavone, Luca
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The formulation of covariant brackets on the space of solutions to a variational problem is analyzed in the framework of contact geometry. It is argued that the Poisson algebra on the space of functionals on fields should be read as a Poisson subalgebra within an algebra of functions equipped with a Jacobi bracket on a suitable contact manifold.
description: 16 pages
Evolving network - simulation study. From regular lattice to scale free network
Creators: name: Makowiec, Danuta
Publisher: name: arXiv
Year: 2005
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: The Watts-Strogatz algorithm of transferring the square lattice to a small world network is modified by introducing preferential rewiring constrained by connectivity demand. The evolution of the network is two-step: sequential preferential rewiring of edges controlled by $p$ and updating the information about changes done. The evolving system self-organizes into stationary states. The topological transition in the graph structure is noticed with respect to $p$. Leafy phase - a graph formed by multiple connected vertices (graph skeleton) with plenty of leaves attached to each skeleton vertex emerges when $p$ is small enough to pretend asynchronous evolution. Tangling phase where edges of a graph circulate frequently among low degree vertices occurs when $p$ is large. There exist conditions at which the resulting stationary network ensemble provides networks which degree distribution exhibit power-law decay in large interval of degrees.
description: 20 pages