cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Massive molecular gas reservoir around the central AGN in the CARLA J1103+3449 cluster at z=1.44
Creators: name: Markov, Vladan
name: Mei, Simona
name: Salomé, Philippe
name: Combes, Francoise
name: Stern, Daniel
name: Galametz, Audrey
name: De Breuck, Carlos
name: Wylezalek, Dominika
name: Amodeo, Stefania
name: Cooke, Elizabeth A.
name: Gonzalez, Anthony H.
name: Hatch, Nina A.
name: Noirot, Gaël
name: Rettura, Alessandro
name: Seymour, Nick
name: Stanford, Spencer A.
name: Vernet, Joël
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Passive early-type galaxies dominate cluster cores at z $\lesssim$1.5. At higher redshift, cluster core galaxies are observed to have still on-going star-formation, fuelled by cold molecular gas. We measure the molecular gas reservoir of the central region around the radio-loud AGN in the cluster CARLA J1103+3449 at z=1.44 with NOEMA. The AGN synchrotron emission dominates the continuum emission at 94.48 GHz, and we measure its flux at the AGN position and at the position of two radio jets. Combining our measurements with published results over the range 4.71 GHz-94.5 GHz, we obtain a flat spectral index $α= 0.14 \pm 0.03$ for the AGN core emission, and a steeper index $α= 1.43 \pm 0.04$ and $α= 1.15 \pm 0.04$ at positions close to the western and eastern lobe, respectively. The total spectral index is $α= 0.92 \pm 0.02$ over the range 73.8 MHz-94.5 GHz. We detect two CO(2-1) emission lines, both blue-shifted with respect to the AGN. Their emission corresponds to two regions, ~17 kpc south-east and ~14 kpc south-west of the AGN, not associated with galaxies. In these two regions, we find a total massive molecular gas reservoir of $M_{gas}$ = 3.9 $\pm$ 0.4 $10^{10} M_{\odot}$, which dominates (~ 60%) the central total molecular gas reservoir. These results can be explained by massive cool gas flows in the center of the cluster. The AGN early-type host is not yet quenched; its star formation rate is consistent with being on the main sequence of star-forming galaxies in the field (SFR~30-140 $M_{\odot}$/yr), and the cluster core molecular gas reservoir is expected to feed the AGN and the host star-formation before quiescence. The other cluster confirmed members show star formation rates at ~2 $σ$ below the field main sequence at similar redshifts and do not have molecular gas masses larger than galaxies of similar stellar mass in the field.
description: 18 pages, 14 figures, A&A, accepted for publication
Uma Abordagem Estratégica Sobre Planificação De Programas De Pesquisa Agrícola Na África Sub-sahariana
Creators: name: SIMA, Technical Team
name: SIMA, Technical Team
Publisher: name: Unknown
Year: 1997
Subjects: subject: Research and Development/Tech Change/Emerging Technologies
subject: food security
subject: food policy
subject: Mozambique

description: Resultados das investigações do Projecto de Segurança Alimentar em Moçambique MAP-Direcção de Economía-Dpto. Estatística
Performance payments for carnivore conservation in Sweden
Creators: name: Zabel, Astrid
name: Holm-Muller, Karin
name: Zabel, Astrid
name: Holm-Muller, Karin
Publisher: name: Unknown
Year: 2007
Subjects: subject: Environmental Economics and Policy
subject: Institutional and Behavioral Economics
subject: Resource /Energy Economics and Policy
subject: Performance payments
subject: Carnivore conservation
subject: Sweden
subject: Collective action

description: Solving carnivore-livestock conflicts is essential if goals to preserve biodiversity conservation are taken seriously and livelihoods especially of poor livestock owners are to be safeguarded. This paper presents an innovative performance payment approach for carnivore conservation, that has been successfully implemented in Sweden. Performance payments are made to reindeer herding Sami villages for certified carnivore offspring on the villages’ territories. First results support the assumption that this approach has the potential to solve many problems inherent to conventional compensation schemes. A well designed common pool regime is deemed necessary to direct the incentives set by the internal distribution of the performance payments toward collective action in carnivore conservation.
GTCM Enabled User involvement in eXtreme Programming Approach
Creators: name: Nuru, Mohammed
name: Mesfin Kifle
Publisher: name: figshare
Year: 2020
Subjects: subject: 80309 Software Engineering
subject: FOS: Computer and information sciences
subject: 80608 Information Systems Development Methodologies
subject: 120403 Engineering Design Methods
subject: FOS: Other engineering and technologies
subject: 80609 Information Systems Management
subject: 150302 Business Information Systems
subject: FOS: Economics and business
subject: 80699 Information Systems not elsewhere classified
subject: 80703 Human Information Behaviour
subject: FOS: Media and communications
subject: Information Systems
subject: 80610 Information Systems Organisation
subject: 80606 Global Information Systems
subject: 80611 Information Systems Theory

description: User involvement has been shown to be beneficial in eXtreme Programming projects. However, it has been a challenging issue in terms of engaging the right target of users for involvement in an eXtreme Programming projects as an onsite-customers. Despite researchers` effort to improve the quality of user involvement in eXtreme Programming projects, the user involvement gaps are still shown to be demanding a solution. The study conducts a literature and assessment-based study of the current practices of GTCM Concept & user involvement in eXtreme Programming and demonstrate the proposition of new approach and evaluations. The result of the research is an approach for the GTCM enabled user involvement in eXtreme Programming for the selection of appropriate users to participate in software development projects. The study used a design science research approach triangulated with qualitative & quantitative assessments and evaluations through action research and expert opinion to address the research objectives. This study proposes a new approach to improve the quality of user involvement in eXtreme Programming projects by using the GTCM Concept for the selection of users to participate in projects. The approach is evaluated in two iterations of project-based action research study and expert evaluation. The results show that the approach improved the quality of user involvement as well as user satisfaction. It is envisaged that the results of the research can be applied in any eXtreme Programming projects to achieve the quality of user involvement.
Electron-Hole Liquid in Monolayer Transition Metal Dichalcogenide Heterostructures
Creators: name: Pekh, P. L.
name: Ratnikov, P. V.
name: Silin, A. P.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Monolayer films of transition metal dichalcogenides (in particular, MoS2, MoSe2, WS2, and WSe2) can be considered as ideal systems for the studies of high-temperature electron-hole liquids. The quasi-two-dimensional nature of electrons and holes ensures their stronger interaction as compared to that in bulk semiconductors. The screening of the Coulomb interaction in monolayer heterostructures is significantly reduced, since it is determined by the permittivities of the environment (e.g., vacuum and substrate), which are much lower than those characteristic of the films of transition metal dichalcogenides. The multivalley structure of the energy spectrum of charge carriers in transition metal dichalcogenides significantly reduces the kinetic energy, resulting in the increase in the equilibrium density and binding energy of the electron-hole liquid. The binding energy of the electron-hole liquid and its equilibrium density are determined. It is shown that the two-dimensional Coulomb potential should be used in the calculations for the electron-hole liquid.
description: 6 pages, 4 figures
Electromagnetic vertex function of the pion at T > 0
Creators: name: van der heide, J.
name: Koch, J. H.
name: Laermann, E.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: The matrix element of the electromagnetic current between pion states is calculated in quenched lattice QCD at a temperature of $T = 0.93 T_c$. The nonperturbatively improved Sheikholeslami-Wohlert action is used together with the corresponding ${\cal O}(a)$ improved vector current. The electromagnetic vertex function is extracted for pion masses down to $360 {\rm MeV}$ and momentum transfers $Q^2 \le 2.7 {\rm GeV}^2$.
description: 17 pages, 8 figures
Protocol for head-to-head evaluation of SARS-CoV-2 immunoassays (June 5th 2020)
Creators: name: Andersson, Monique
name: Bown, Abbie
name: Brooks, Tim
name: Crook, Derrick
name: Ebner, Daniel
name: Eyre, David W.
name: Gent, Nick
name: James, Tim
name: Lumley, Sheila F.
name: Hallis, Bassam
name: Hammond, Peter
name: Hoosdally, Sarah
name: Howarth, Alison
name: Matthews, Philippa
name: Mentzer, Alexander
name: Peto, Timothy E. A.
name: Rowe, Cathy
name: Sienkiewicz, Alex
name: Stoesser, Nicole
name: Vipond, Richard
Publisher: name: figshare
Year: 2020
Subjects: subject: Microbiology
subject: FOS: Biological sciences
subject: 110303 Clinical Microbiology
subject: FOS: Clinical medicine
subject: 30104 Immunological and Bioassay Methods
subject: FOS: Chemical sciences

description: Protocol for the evaluation of four commercial immunoassays (Abbott’s SARS-CoV-2 Immunoassay, DiaSorin’s LIAISON® SARS-CoV-2 S1/S2 IgG, Roche’s Elecsys® Anti-SARS-CoV-2, Siemens’ SARS-CoV-2 Total [COV2T]) and a novel 384-well format ELISA (the Oxford immunoassay [OIA]) for the detection of SARS-CoV-2 antibodies (author list is alphabetical).
Towards a certification of biomass: Feasibility of a certifications scheme of sustainability standards for trade and production of bioethanol in Brazil
Creators: name: Delzeit, Ruth
name: Bohle, Hans-Georg
name: Holm-Muller, Karin
name: Delzeit, Ruth
name: Bohle, Hans-Georg
name: Holm-Muller, Karin
Publisher: name: Unknown
Year: 2007
Subjects: subject: Environmental Economics and Policy
subject: Institutional and Behavioral Economics
subject: International Relations/Trade
subject: Resource /Energy Economics and Policy
subject: certification
subject: sustainability standards
subject: bioethanol

description: Bioenergy produced from biomass is increasingly used to substitute fossil energy sources. Trade of biomass is expected to increase in the following years due to disparities in production costs and potentials in countries and regions. In this paper the possibility of a certification scheme for minimizing negative socio-ecological impacts and for increasing a sustainable production of biomass is discussed, taking Brazilian bioethanol as an example. This case-study comes up with a first set of feasible sustainability standards for Brazilian bioethanol and discusses issues to be considered when developing sustainability standards. At the same time problematic aspects are identified. When incorporating opinions of different stakeholders, the setting of sustainability standards holds the inherent danger of being used as non-tariff trade barriers. This leads to the need for a regionalisation of sustainability standards and raises questions on structure and level of a certification scheme.
Two-dimensional nonlinear Thouless pumping of matter waves
Creators: name: Fu, Qidong
name: Wang, Peng
name: Kartashov, Yaroslav V.
name: Konotop, Vladimir V.
name: Ye, Fangwei
Publisher: name: arXiv
Year: 2022
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We consider theoretically the nonlinear quantized Thouless pumping of a Bose-Einstein condensate loaded in a two-dimensional dynamical optical lattices. We encountered three different scenarios of the pumping: quasi-linear one occurring for gradually dispersing wave packets, transport carried by a single two-dimensional soliton, and multi-soliton regime when initial wave packet splits into several solitons. The scenario to be realized depends on the number of atoms in the initial wave packet and on the strength of the two-body interactions. The magnitude and direction of the displacement of a wavepacket are determined by Chern numbers of the populated energy bands and by the inter-band transitions induced by two-body interactions. As a case example we explore a separable potential created by optical lattices whose constitutive sublattices undergo relative motion in the orthogonal directions. For such potentials, obeying parity-time symmetry, fractional Chern numbers, computed over half period of the evolution, acquire relevance. We focus mainly on solitonic scenarios, showing that one-soliton pumping occurs at relatively small as well as at sufficiently large amplitudes of the initial wavepacket, while at intermediate amplitudes the transport is multi-solitonic. We also describe peculiarities of the pumping characterized by two different commensurate periods of the modulations of the lattices in the orthogonal directions.
description: 6 pages, 3 figures, to appear in Physical Review Letters
The nature of the relationship between international tourism and international trade: the case of German imports of Spanish wine
Creators: name: Fischer, Christian
name: Gil-Alana, Luis A.
name: Fischer, Christian
name: Gil-Alana, Luis A.
Publisher: name: Unknown
Year: 2007
Subjects: subject: Demand and Price Analysis
subject: International Relations/Trade
subject: international trade
subject: tourism
subject: long memory
subject: Spanish wine

description: This paper deals with the relationship between international trade and tourism. In particular, we focus on the effect that German tourism to Spain has on German imports of Spanish wine. Due to the different stochastic properties of the series under analysis, which display different orders of integration, we use a methodology based on long memory regression models, where tourism is supposed to be exogenous. The results show that at the aggregate level, tourism has an effect on wine imports that lasts between two and nine months. Disaggregating the imports across the different types of wine it is observed that only for red wines from Navarra, Penedús and Valdepeñas, and to a certain extent for sparkling wine, tourism produces an effect on future import demand. From a policy-making perspective our results imply that the impact of tourism on the host economy is not only direct and short-term but also oblique and delayed, thus reinforcing the case for tourism as a means for economic development.
Weight-driven growing networks
Creators: name: Antal, T.
name: Krapivsky, P. L.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We study growing networks in which each link carries a certain weight (randomly assigned at birth and fixed thereafter). The weight of a node is defined as the sum of the weights of the links attached to the node, and the network grows via the simplest weight-driven rule: A newly-added node is connected to an already existing node with the probability which is proportional to the weight of that node. We show that the node weight distribution n(w) has a universal, that is independent on the link weight distribution, tail: n(w) ~ w^-3 as w->oo. Results are particularly neat for the exponential link weight distribution when n(w) is algebraic over the entire weight range.
description: 6 pages, 2 eps figures
The Conservation Reserve Program, Off-Farm Work, and Farm Household Technical Efficiencies
Creators: name: Chang, Hung-Hao
name: Boisvert, Richard N.
name: Chang, Hung-Hao
name: Boisvert, Richard N.
Publisher: name: Unknown
Year: 2009
Subjects: subject: Agribusiness
subject: Agricultural Finance
subject: Farm Management
subject: Conservation Reserve Program
subject: off-farm work
subject: household technical efficiency

description: Using data from a national survey of farm households in the United States, this paper examines the effects of farm households’ decisions to participate in the Conservation Reserve Program (CRP) and to work off the farm on the technical efficiency of farm household production. After controlling for the self selection bias in estimating the multiple output-oriented distance functions, results show that operators’ decisions to work off the farm (both separately and combined with participation in CRP) lead to higher technical efficiencies for farm household production— implying improvements in the resource allocation between farm and other productive activities by farm households. The technical efficiencies of household production of those farm households participating only in the CRP are lower.
GW190814: Spin and equation of state of a neutron star companion
Creators: name: Tsokaros, Antonios
name: Ruiz, Milton
name: Shapiro, Stuart L.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The recent discovery by LIGO/Virgo of a merging binary having a $\sim 23 M_\odot$ black hole and a $\sim 2.6 M_\odot$ compact companion has triggered a debate regarding the nature of the secondary, which falls into the so-called mass gap. Here we explore some consequences of the assumption that the secondary was a neutron star (NS). We show with concrete examples of heretofore viable equations of state (EOSs) that rapid uniform rotation may neither be necessary for some EOSs nor sufficient for others to explain the presence of a NS. Absolute upper limits for the maximum mass of a spherical NS derived from GW170817 already suggest that this unknown compact companion might be a slowly or even a nonrotating NS. However several soft NS EOSs favored by GW170817 with maximum spherical masses $\lesssim 2.1 M_\odot$ cannot be invoked to explain this object, even allowing for maximum uniform rotation. By contrast, sufficiently stiff EOSs that yield $2.6 M_\odot$ NSs which are slowly rotating or, in some cases, nonrotating, and are compatible with GW170817 and the results of NICER, can account for the black hole companion.
description: 7 pages, 2 figures. Matches published version
Lithium enhancement in X-ray binaries due to stellar rotation
Creators: name: Maccarone, T. J.
name: Jonker, P. G.
name: Sills, A. I.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We discuss the high lithium abundances in the secondary stars of X-ray binaries. We show that no lithium production in these stars is necessary, and that the abundances can be explained simply due to the tidally locked rotation of the stars, which lead naturally to slower lithium destruction rates. The differences in abundances of CVs' secondaries from those of LMXBs had previously been put forth as evidence that the compact object was related to the lithium abundance, but this scenario also accounts for the lower lithium abundances in the secondary stars in cataclysmic variable systems (CVs) than in low mass X-ray binaries (LMXBs), since these stars have typically lived much longer before becoming tidally locked short period systems. We point out that if this scenario is correct, then the globular cluster X-ray binaries' donor stars should, as a class, show less lithium enhancement relative to other stars of the same spectral type in the clusters than the field X-ray binaries' donor stars show.
description: 5 pages, accepted to A&A research notes
Comprehensive Systemic eCommerce Framework: Solution for the COVID-19 Pandemic Impacts on Small Business Communities
Creators: name: Nuru, Mohammed
Publisher: name: figshare
Year: 2020
Subjects: subject: 120404 Engineering Systems Design
subject: FOS: Other engineering and technologies
subject: 80610 Information Systems Organisation
subject: FOS: Computer and information sciences
subject: 80611 Information Systems Theory
subject: 80309 Software Engineering
subject: 80306 Open Software
subject: 159999 Commerce, Management, Tourism and Services not elsewhere classified
subject: FOS: Economics and business

description: Small businesses today are in deep crisis due to the impacts of COVID-19 and the measures taken by the government, policymakers, and leaders to survive the pandemic. The study investigates the new challenges that emerged in the market and explore the eCommerce Community. The main purpose of the research is to propose a Comprehensive Systemic Framework using the systems thinking approach and the eCommerce principles and models to address the challenges in the small business community and a solution to support the market survive such massive pandemics in the future.
Low energy hadron physics in holographic QCD
Creators: name: Sakai, Tadakatsu
name: Sugimoto, Shigeki
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present a holographic dual of four-dimensional, large N_c QCD with massless flavors. This model is constructed by placing N_f probe D8-branes into a D4 background, where supersymmetry is completely broken. The chiral symmetry breaking in QCD is manifested as a smooth interpolation of D8 - anti-D8 pairs in the supergravity background. The meson spectrum is examined by analyzing a five-dimensional Yang-Mills theory that originates from the non-Abelian DBI action of the probe D8-brane. It is found that our model yields massless pions, which are identified with Nambu-Goldstone bosons associated with the chiral symmetry breaking. We obtain the low-energy effective action of the pion field and show that it contains the usual kinetic term of the chiral Lagrangian and the Skyrme term. A brane configuration that defines a dynamical baryon is identified with the Skyrmion. We also derive the effective action including the lightest vector meson. Our model is closely related to that in the hidden local symmetry approach, and we obtain a Kawarabayashi-Suzuki-Riazuddin-Fayyazuddin-type relation among the couplings. Furthermore, we investigate the Chern-Simons term on the probe brane and show that it leads to the Wess-Zumino-Witten term. The mass of the η' meson is also considered, and we formulate a simple derivation of the η' mass term satisfying the Witten-Veneziano formula from supergravity.
description: 46 pages, 1 figure, minor corrections, version to appear in Prog. Theor. Phys, v4: typos corrected, v5: The normalization of the 5d Yang-Mills action given in Eq. (5.1) is corrected. Some of the expressions in section 5 are modified accordingly, but all the conclusions remain unchanged
Does Participation in the Conservation Reserve Program and/or Off-Farm Work Affect the Level and Distribution of Farm Household Income?
Creators: name: Chang, Hung-Hao
name: Boisvert, Richard N.
name: Chang, Hung-Hao
name: Boisvert, Richard N.
Publisher: name: Unknown
Year: 2009
Subjects: subject: Agribusiness
subject: Agricultural Finance
subject: Farm Management
subject: Conservation Reserve Program
subject: farm household income
subject: income distribution
subject: off-farm work

description: Since both release resources from agricultural production, it is not surprising that decisions to work off the farm and to participate in the U. S. Conservation Reserve Program (CRP) are correlated. By incorporating these decisions into a heteroskedastic specification of a farm household income function, we identify their effects on mean income, as well as on the variability in income for groups of farm households participating in combinations of these activities. Our results indicate participation in CRP and off-farm work by the operator and the spouse increase farm household income, but these choices also decrease the variability in household income among participant households relative to that of other farm households with otherwise similar characteristics.
Inclusive Development: Two Papers on Conceptualization, Application, and the ADB Perspective
Creators: name: Rauniyar, Ganesh P.
name: Kanbur, Ravi
name: Rauniyar, Ganesh P.
name: Kanbur, Ravi
Publisher: name: Unknown
Year: 2010
Subjects: International Development
International Relations/Trade

description: This compendium brings together two companion papers on inclusive development. The first paper uses the global literature to formulate a conceptualisation of inclusive development and inclusive growth, and to put the conceptualisation through its paces by applying it to the specific case of donor assistance to rural infrastructure. The second paper conducts a detailed review and a synthesis of Asian Development Bank literature on inclusive growth and inclusive development, to see how one particular international organization has addressed, and attempted to resolve, the analytical and operational issues associated with inclusive development.
Ethnic Diversity and Ethnic Strife: An Interdisciplinary Perspective
Creators: name: Kanbur, Ravi
name: Rajaram, Prem Kumar
name: Varshney, Ashutosh
name: Kanbur, Ravi
name: Rajaram, Prem Kumar
name: Varshney, Ashutosh
Publisher: name: Unknown
Year: 2010
Subjects: subject: International Development
subject: International Relations/Trade
subject: Ethnicity
subject: Conflict
subject: Interdisciplinary Approaches

description: The objective of this paper is to present an overview of ethnicity, ethnic strife and its consequences, as seen from the perspective of the disciplines of economics, political science, social anthropology and sociology. What exactly is ethnicity--how is it to be defined, characterized and measured? What exactly are the causal links from ethnicity so defined to its presumed consequences, including tension and violence? What are the feedback loops from the consequences of ethnic divisions back to these divisions themselves? How can policy, if at all, mitigate ethnic divisions and ethnic conflict? Finally, what role does interdisciplinarity have in helping to understand ethnicity and ethnic strife, and how can interdisciplinary collaboration be enhanced? These are the questions which this paper takes up and deals with in sequence.
The a priori tanθtheorem for eigenvectors
Creators: name: Albeverio, Sergio
name: Motovilov, Alexander K.
name: Selin, Alexei V.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Spectral Theory (math.SP)
subject: Numerical Analysis (math.NA)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 47A55; 47B25

description: Let $A$ be a self-adjoint operator on a Hilbert space $\fH$. Assume that the spectrum of $A$ consists of two disjoint components $σ_0$ and $σ_1$ such that the convex hull of the set $σ_0$ does not intersect the set $σ_1$. Let $V$ be a bounded self-adjoint operator on $\fH$ off-diagonal with respect to the orthogonal decomposition $\fH=\fH_0\oplus\fH_1$ where $\fH_0$ and $\fH_1$ are the spectral subspaces of $A$ associated with the spectral sets $σ_0$ and $σ_1$, respectively. It is known that if $\|V\|0$ then the perturbation $V$ does not close the gaps between $σ_0$ and $σ_1$. Assuming that $f$ is an eigenvector of the perturbed operator $A+V$ associated with its eigenvalue in the interval $(\min(σ_0)-d,\max(σ_0)+d)$ we prove that under the condition $\|V\|
Can we distinguish energy loss from hadron absoprtion?
Creators: name: Accardi, Alberto
Publisher: name: arXiv
Year: 2005
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Knowing whether a hadron is formed inside or outside the nuclear medium is very important for correctly interpreting jet quenching in heavy-ion collisions. The cleanest experimental environment to study the space-time evolution of hadronization is semi-inclusive DIS on nuclear targets. Two frameworks are presently competing to explain the observed attenuation of hadron production: quark energy loss, with hadron formation outside the nucleus, and nuclear absorption with hadronization starting inside the nucleus. I demonstrate that the observed approximate A^(2/3) scaling of experimental data cannot conclusively establish the correctness of either energy loss or absorption.
description: 4 pages, 1 figure. Poster proceedings of Quark Matter 2005 (QM2005), Budapest, Aug 2005. v2: a few typos corrected
Comment on Singularity-free Cosmological Solutions with Non-rotating Perfect Fluids
Creators: name: Fernandez-Jambrina, L.
Publisher: name: arXiv
Year: 2005
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: A conjecture stated by Raychaudhuri which claims that the only physical perfect fluid non-rotating non-singular cosmological models are comprised in the Ruiz-Senovilla and Fernandez-Jambrina families is shown to be incorrect. An explicit counterexample is provided and the failure of the argument leading to the result is explicitly pointed out.
description: LaTeX, 5 pages
Revisiting Dudas-Mourad compactifications
Creators: name: Basile, Ivano
name: Raucci, Salvatore
name: Thomée, Sylvain
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Superstring theories in ten dimensions allow spacetime supersymmetry breaking at the string scale at the expense of controlled Minkowski backgrounds. The next-to-maximally symmetric backgrounds, found by Dudas and Mourad, involve a warped compactification on an interval associated with codimension-one defects. We generalize these solutions by varying the effective field theory parameters, and we discuss the dimensional reduction on the interval. In particular, we show that scalars and form fields decouple in a certain range of dimensions, yielding Einstein-Yang-Mills theory. Moreover, we find that the breakdown of this effective description due to light Kaluza-Klein modes reflects the swampland distance conjecture, supporting the consistency of the picture at least qualitatively.
description: 33 pages. Invited contribution to the special issue "Probing the Quantum Space-Time" in Universe
The magnetic structure of the subsolar MPB current layer from MAVEN observations: Implications for the Hall electric force
Creators: name: Boscoboinik, G.
name: Bertucci, C.
name: Gomez, D.
name: Morales, L.
name: Mazelle, C.
name: Halekas, J.
name: Gruesbeck, J.
name: Mitchell, D.
name: Jakosky, B.
name: Penou, E.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Space Physics (physics.space-ph)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We report on the local structure of the Martian subsolar Magnetic Pileup Boundary (MPB) from minimum variance analysis of the magnetic field measured by the Mars Atmosphere and Volatile EvolutioN (MAVEN) spacecraft for six orbits. In particular, we detect a well defined current layer within the MPB and provide a local estimate of its current density which results in a sunward Hall electric force. This force accounts for the deflection of the solar wind ions and the acceleration of electrons which carry the interplanetary magnetic field through the MPB into the Magnetic Pileup Region. We find that the thickness of the MPB current layer is of the order of both the upstream (magnetosheath) solar wind proton inertial length and convective gyroradius. This study provides a high resolution view of one of the components of the current system around Mars reported in recent works.
description: 14 pages, 2 figures
Angola’s Macroeconomy and Agricultural Growth
Creators: name: Kyle, Steven C.
name: Kyle, Steven C.
Publisher: name: Unknown
Year: 2010
Subjects: Financial Economics
Resource /Energy Economics and Policy

description: This paper discusses the effects of Angola’s mineral wealth on the process of agricultural development. Though Angola has a rich agricultural resource base its history of civil war and extreme real exchange rate distortions has resulted in agricultural stagnation through many parts of the country. Though the security situation is now much improved, current high oil prices along with oil output increases mean that pressures on the real exchange rate will remain a fact of life for the foreseeable future.
Comprehensive Systemic eCommerce Framework.pdf
Creators: name: Nuru, Mohammed
Publisher: name: figshare
Year: 2020
Subjects: subject: 120404 Engineering Systems Design
subject: FOS: Other engineering and technologies
subject: 80610 Information Systems Organisation
subject: FOS: Computer and information sciences
subject: 80611 Information Systems Theory
subject: 80309 Software Engineering
subject: 80306 Open Software
subject: 159999 Commerce, Management, Tourism and Services not elsewhere classified
subject: FOS: Economics and business

description: Small businesses today are in deep crisis due to the impacts of COVID-19 and the measures taken by the government, policymakers, and leaders to survive the pandemic. The study investigates the new challenges that emerged in the market and explore the eCommerce Community. The main purpose of the research is to propose a Comprehensive Systemic Framework using the systems thinking approach and the eCommerce principles and models to address the challenges in the small business community and a solution to support the market survive such massive pandemics in the future.
The culture of aging among South Asian communities in Vancouver
Creators: name: Lal, Rohinee Lata
Publisher: name: University of British Columbia
Year: 2009

description: Current studies on aging emphasize that Canada's population is steadily growing older and existing policies and programs need to adjust to these changes. Termed the "apocalyptic demography" ideology, scholars believe that this trend will place higher demands on the young to pay to meet the needs of the aged. A criticism of this ideology is its failure to recognize the ethnic and socioeconomic diversity within the aging community and in the individual experiences of aging. This work examines the aging process among South Asian communities in Vancouver by aiming to answer the following three questions: (1) What factors do South Asians consider when they think about caring for elderly parents? (2) What services for the elderly currently exist and what are their usage patterns? (3) What are the current and anticipated caring needs of South Asian elders? Data for this study was collected through interviews and focus groups conducted with South Asian elders, their adult caregivers, and community service providers. The results of this research indicate that adult caregivers are concerned with values such as filial piety, primogeniture, family dynamics, and caregiver burden when they consider caring for their elderly. Weekly South Asian support groups that currently exist in Vancouver provide outlets where elders can socialize with others and learn about community resources. There appears to be no strong preference for a particular type of elder care. However, many South Asian elders and their families cite deteriorating health as the main reason they would consider using care facilities. While current demographics of the South Asian communities in Vancouver counteract the "apocalyptic demography" argument by indicating no strong urgency to meet the needs of the elders, these needs will gradually change in the future. In Vancouver, South Asian communities tend to have individuals who display more supportive networks of social resources suggesting a lesser demand on government-run services. By organizing more community-based services for elders as an extension of traditional family caregiving, this method of elder care can serve as a model for meeting the needs of other aging populations throughout the province without creating a strong dependency on government-run resources.
Neutron Depolarization due to Ferromagnetism and Spin Freezing in CePd$_{1-x}$Rh$_x$
Creators: name: Seifert, M.
name: Schmakat, P.
name: Schulz, M.
name: Jorba, P.
name: Hutanu, V.
name: Geibel, C.
name: Deppe, M.
name: Pfleiderer, C.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We report neutron depolarization measurements of the suppression of long-range ferromagnetism and the emergence of magnetic irreversibilities and spin freezing in CePd$_{1-x}$Rh$_x$ around $x^*\approx0.6$. Tracking the temperature versus field history of the neutron depolarization, we find clear signatures of long-range Ising ferromagnetism below a Curie temperature $T_{\rm C}$ for $x=0.4$ and a spin freezing of tiny ferromagnetic clusters below a freezing temperature $T_{\rm F1}$ for $x>x^*$. Under zero-field-cooling/field-heating and for $x>x^*$ a reentrant temperature dependence of the neutron depolarization between $T_{\rm F2}
GLSMs for exotic Grassmannians
Creators: name: Gu, W.
name: Sharpe, E.
name: Zou, H.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper we explore nonabelian gauged linear sigma models (GLSMs) for symplectic and orthogonal Grassmannians and flag manifolds, checking e.g. global symmetries, Witten indices, and Calabi-Yau conditions, following up a proposal in the math community. For symplectic Grassmannians, we check that the Coulomb branch vacua of the GLSM are consistent with ordinary and equivariant quantum cohomology of the space.
description: LaTeX, 49 pages; v2: typos fixed
Neural network prediction of geomagnetic activity: a method using local Hölder exponents
Creators: name: Vörös, Z.
name: Jankovičová, D.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Computational Physics (physics.comp-ph)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: Local scaling and singularity properties of solar wind and geomagnetic time series were analysed using Hölder exponents $α$. It was shown that in analysed cases due to multifractality of fluctuations $α$ changes from point to point. We argued there exists a peculiar interplay between regularity / irregularity and amplitude characteristics of fluctuations which could be exploited for improvement of predictions of geomagnetic activity. To this end layered backpropagation artificial neural network model with feedback connection was used for the study of the solar wind - magnetosphere coupling and prediction of geomagnetic $D_{st}$ index. The solar wind input was taken from principal component analysis of interplanetary magnetic field, proton density and bulk velocity. Superior network performance was achieved in cases when the information on local Hölder exponents was added to the input layer.
description: 17 pages, 7 figures
Photogenerated Carriers in SrTiO3 Probed by Mid-Infrared Absorption
Creators: name: Okamura, H.
name: Matsubara, M.
name: Tanaka, K.
name: Fukui, K.
name: Nakagawa, H.
name: Ikemoto, Y.
name: Moriwaki, T.
name: Kimura, H.
name: Nanba, T.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: Infrared absorption spectra of SrTiO$_3$ have been measured under above-band-gap photoexcitations to study the properties of photogenerated carriers, which should play important roles in previously reported photoinduced phenomena in SrTiO$_3$. A broad absorption band appears over the entire mid-infrared region under photoexcitation. Detailed energy, temperature, and excitation power dependences of the photoinduced absorption are reported. This photo-induced absorption is attributed to the intragap excitations of the photogenerated carriers. The data show the existence of a high density of in-gap states for the photocarriers, which extends over a wide energy range starting from the conduction and valence band edges.
description: 5 pages, 5 figures, submitted to J. Phys. Soc. Jpn
Nonperturbative QCD Phenomenology and Light Quark Physics
Creators: name: Tandy, P. C.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Recent progress in modeling QCD for hadron physics through truncated Dyson-Schwinger equations is reviewed. Special emphasis is put upon comparison of dressed quark propagators and the dressed quark-gluon vertex with lattice-QCD results.
description: 6 pages, 7 figures. Invited talk at the QCD Down Under workshop at the CSSM/University of Adelaide, March 2004
EMIGRATIONAL INCLINATION - STAYING OR LEAVING – FREE MIGRATION POSSIBILITIES AND TENDENCIES IN B. A. Z. COUNTY
Creators: name: Dabasi-Halasz, Zsuzsanna
name: Kasa, Richard
name: Dabasi-Halasz, Zsuzsanna
name: Kasa, Richard
Publisher: name: Unknown
Year: 2007
Subjects: subject: Labor and Human Capital
subject: migration
subject: motivational factors
subject: emigrational network

description: In this recent study we would like to show how migration affects in Borsod-Abaúj-Zemplén County, which components it has, what differences are there between gross and net emigrational inclination, what measures have been done by the ones who are determined to leave Hungary in expectations of a foreign job. A 375-element-sample was taken and had been appraised in order to measure the net emigration, the emigrational network and so the emigrational shell.
Determination of Dynamical exponents of Graphene at quantum critical point by holography
Creators: name: Song, Geunho
name: Seo, Yunseok
name: Sin, Sang-Jin
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We calculate the transport of a theory with two conserved currents by holographic method and compare it with graphene data to determine its dynamical exponents $(z,θ)$ which characterizes a QCP. As a result, we find that the electric and the thermal conductivity data can be fit much more naturally if we assume $(z,θ)=(3/2,1)$ rather than $(1,0)$. Furthermore, we find that thermoelectric power data at high temperature can be fit if we use $(3/2,1)$ but not at all by $(1,0)$. The $θ=1$ result can be interpreted as taking into account the fermionic nature of the electrons and $z=3/2$ can be interpreted as the flattened band by the strong interaction.
description: 9 pages, 6 figures
Three-dimensional Mapping of CDM Substructure at Submillimeter Wavelengths
Creators: name: Inoue, Kaiki Taro
name: Chiba, Masashi
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The cold dark matter (CDM) structure formation model predicts that about 5-10 percent of a typical galactic halo of mass $\sim 10^{12} \ms$ is in substructures with masses $\lesssim 10^8 \ms$. To directly detect such substructures, we propose to observe dust continuum emission from a strongly lensed QSO-host galaxy using a large submillimeter interferometer array with a high angular resolution of $\sim 0.01$arcsec such as the planned Atacama Large Submillimeter Array (ALMA). To assess their observational feasibility, we numerically simulate millilensing of an extended circular source by a CDM substructure modeled as a tidally truncated singular isothermal sphere (SIS) embedded in a typical QSO-galaxy lens system, B1422+231, modeled as a singular isothermal ellipsoid (SIE) with an external constant shear and a constant convergence. Assuming an angular resolution of 0.01arcsec, we find that the angular positions of $\sim 10^8 \ms$ substructures at several kpc from the center of the macrolens halo can be directly measured if the size of the dust continuum emission region and the gradient of the surface brightness at the position of the perturber are sufficiently large. From the astrometric shift on a scale of a few times $10~$mas of an image perturbed by a subhalo with respect to an unperturbed macrolensed image, we can break the degeneracy between subhalo mass and distance provided that macrolensing parameters are determined from positions and fluxes of multiple images.
description: 7 pages, 7 EPS files. An assessment of our assumption of constancy in shear and convergence has been included. Version accepted for publication in ApJ
A decoy-state protocol for quantum cryptography with 4 intensities of coherent states
Creators: name: Wang, Xiang-Bin
Publisher: name: arXiv
Year: 2004
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In order to beat any type of photon-number-splitting attack, we propose a protocol for quantum key distributoin (QKD) using 4 different intensities of pulses. They are vacuum and coherent states with mean photon number $μ,μ'$ and $μ_s$. $μ_s$ is around 0.55 and this class of pulses are used as the main signal states. The other two classes of coherent states ($μ,μ'$) are also used signal states but their counting rates should be studied jointly with the vacuum. We have shown that, given the typical set-up in practice, the key rate from the main signal pulses is quite close to the theoretically allowed maximal rate in the case given the small overall transmittance of $10^{-4}$.
THE LINK BETWEEN EDUCATION AND THE STATE OF THE LABOUR MARKET IN HUNGARY
Creators: name: Csehne Papp, Imola
name: Csehne Papp, Imola
Publisher: name: Unknown
Year: 2007
Subjects: subject: Labor and Human Capital
subject: labour market
subject: education
subject: unemployment
subject: possibility of employment

description: Education became one of the largest sub-system of modern societies in the past century. The role of education is no longer interpreted only as the conveyor of culture, knowledge and values, but it is also attributed a significant role in its contribution to economic development and the promotion of social integration. The development of the theory of the human capital is associated with Theodore W. Schulz. According to his presumptions, the people make investments through education and training that increase their ability to produce, their productivity and thus the market value of their work. There have different explanations created to justify the contribution of education to economic development. The most significant from among them are as follows: education has got a direct impact of increasing productivity (theory of the human capital); employees of higher qualification levels participate in non-the-job further training courses in higher proportions, which also increases productivity; investment in the human capital is an alternative of consumption, as educational expenses are not usually covered from savings.