cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Tetraquarks with open charm favor
Creators: name: Xue, Yaoyao
name: Jin, Xin
name: Huang, Hongxia
name: Ping, Jialun
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Inspired by the recent report of the exotic states $X_{0}(2900)$ and $X_{1}(2900)$ with four different quark flavors in the $D^{-}K^{+}$ invariant mass distributions of the decay process $B^{+}\rightarrow D^{+}D^{-}K^{+}$ by the LHCb collaboration, we systematically investigate the tetraquarks composed of $ud\bar{s}\bar{c}$ with meson-meson and diquark-antidiquark structures in the quark delocalization color screening model. We find that the $X_{0}(2900)$ can be interpreted as the molecular state $\bar{D^{*}}K^{*}$ with $IJ^{P}=00^{+}$. Moreover, two bound states are obtained by the channel coupling calculation, with energies $2341.2$ MeV for $IJ^{P}=00^{+}$ and $2489.7$ MeV for $IJ^{P}=01^{+}$, respectively. We also extend our study to the $uc\bar{d}\bar{s}$ systems and find that there is no any bound state, so the $D_{s0}(2317)$ cannot be identified as the $DK$ molecular state in present calculation. Besides, several resonance states with the diquark-antidiquark configuration are possible in both $ud\bar{s}\bar{c}$ and $uc\bar{d}\bar{s}$ systems. All these open charm bound states and resonances are worth searching in the future experiments.
description: 8 pages, 2 figures. arXiv admin note: text overlap with arXiv:1902.05778
Third order perturbations of a zero-pressure cosmological medium: Pure general relativistic nonlinear effects
Creators: name: Hwang, J.
name: Noh, H.
Publisher: name: arXiv
Year: 2004
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We consider a general relativistic zero-pressure irrotational cosmological medium perturbed to the third order. We assume a flat Friedmann background but include the cosmological constant. We ignore the rotational perturbation which decays in expanding phase. In our previous studies we discovered that, to the second-order perturbation, except for the gravitational wave contributions, the relativistic equations coincide exactly with the previously known Newtonian ones. Since the Newtonian second-order equations are fully nonlinear, any nonvanishing third and higher order terms in the relativistic analyses are supposed to be pure relativistic corrections. In this work we derive such correction terms appearing in the third order. Continuing our success in the second-order perturbations we take the comoving gauge. We discover that the third-order correction terms are of $ϕ_v$-order higher than the second-order terms where $ϕ_v$ is a gauge-invariant combination related to the three-space curvature perturbation in the comoving gauge; compared with the Newtonian potential we have $δΦ\sim {3 \over 5} ϕ_v$ to the linear order. Therefore, the pure general relativistic effects are of $varphi_v$-order higher than the Newtonian ones. The corrections terms are independent of the horizon scale and depend only on the linear order gravitational potential perturbation strength. From the temperature anisotropy of cosmic microwave background we have ${δT \over T} \sim {1 \over 3} δΦ\sim {1 \over 5} ϕ_v \sim 10^{-5}$. Therefore, our present result reinforces our previous important practical implication that near current era one can use the large-scale Newtonian numerical simulation more reliably even as the simulation scale approaches near the horizon.
description: 9 pages, no figure
Indikatoren einer nachhaltigen Landwirtschaft im Regionalisierten Agrar- und Umweltinformationssystem für die Bundesrepublik Deutschland (RAUMIS)
Creators: name: Julius, Christian
name: Moller, Christine
name: Osterburg, Bernhard
name: Sieber, Stefan
name: Julius, Christian
name: Moller, Christine
name: Osterburg, Bernhard
name: Sieber, Stefan
Publisher: name: Unknown
Year: 2003
Subjects: subject: Agricultural and Food Policy
subject: Environmental Economics and Policy
subject: sustainable development
subject: model-based policy consultation
subject: Regional Agricultural and Environmental Information System for Germany (RAUMIS)
subject: agri-environmental indicators

description: According to the formulation of a political concept which centres on the principles of sustainable agricultural land use, agri-environmental aspects have gained an accretive importance within model based policy consultation. In this context, the following article illustrates the Regionalised Agricultural and Environmental Information System RAUMIS. It describes the state of development of the actual integration of agri-environmental indicators as well as analytical results and their applicatory suitability. The main intention of using indicators within RAUMIS is to achieve a differentiated illustration of environmental impacts of agricultural land use in the context of actual-state analysis and prospective simulations.
Bourgueville, Charles de, Les Recherches et antiquitez de la province de Neustrie , à present duché de Normandie, comme des villes remarquables d'icelle : mais plus speciallement de la ville et université de Caen, Caen, Impr. De Vincent et Jean le Feure, 1588
Creators: name: de Bourgueville, Charles
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2019

description: Source: https://gallica.bnf.fr/ark:/12148/bpt6k87172310
description: Relation: vignette : https://www.nakala.fr/data/11280/4e7cdf09
Koppelung agrarökonomischer und hydrologischer Modelle
Creators: name: Gomann, Horst
name: Kreins, Peter
name: Kunkel, Ralf
name: Wendland, Frank
name: Gomann, Horst
name: Kreins, Peter
name: Kunkel, Ralf
name: Wendland, Frank
Publisher: name: Unknown
Year: 2003
Subjects: subject: Agricultural and Food Policy
subject: Environmental Economics and Policy
subject: model-based policy consulting
subject: interdisciplinary model networks
subject: agricultural sector model
subject: diffuse agricultural nitrogen immissions

description: The objective of the paper is to show the potential of interdisciplinary model networks consisting of agricultural economic and natural science models performing integrated impact assessments of agri-environmental policies. The potentials are exemplified using a coupling of the agricultural sector model RAUMIS with the hydrological models GROWA98 and WEKU in the scope of diffuse agricultural nitrogen immission into waterbodies. A brief classification of applied indicators is given. A key element for policy impact analyses are the relationships between the environmental indicator categories Driving Force, State and Response. The major relationships within this environmental scope as well as the modeling are explained. The presented model network represents a first area wide, regionally differentiated, consistent link-up between the Driving Force indicator “nitrogen balance surplus”, the State indicator “nitrogen(nitrate)concentration” and the response indicators. The results show that due to the local characteristics quite different shares of the agricultural nitrogen surplus finally enters the ground and surface waters. Hence, assessing the trade-offs of agri-environmental water protection measures requires an inclusion of natural local characteristics. The integrated consideration of the complex relationships and a comprehensive implementation of local characteristics allows to develop more efficient water pollution control measures.
Search for B-Meson Decays to Two-Body Final States with a0(980) Mesons
Creators: name: The BABAR Collaboration
name: Aubert, B.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We present a search for B decays to charmless final states involving charged or neutral a0 mesons. The data sample corresponds to 89 million BBbar pairs collected with the BABAR detector operating at the PEP-II asymmetric-energy B Factory at SLAC. We find no significant signals and determine the following 90% C.L. upper limits: BR(B0 -> a0-pi+) < 5.1x10{-6}, BR(B0 -> a0-K+) < 2.1x10{-6}, BR(B- -> a0-K0bar) < 3.9x10{-6}, BR(B+ -> a00pi+) < 5.8x10{-6}, BR(B+ -> a00K+) < 2.5x10{-6}, and BR(B0 -> a00K0) < 7.8x10{-6}, where in all cases BR indicates the product of branching fractions for B -> a0X and a0 -> etapi, where X indicates K or pi.
description: 7 pp, 3 Post figs, Revised version for PRD Rapid Comm
Observation of the Dipole Blockade Effect in Detecting Rydberg Atoms by the Selective Field Ionization Method
Creators: name: Yakshina, E. A.
name: Tretyakov, D. B.
name: Entin, V. M.
name: Beterov, I. I.
name: Ryabtsev, I. I.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The dipole blockade effect at laser excitation of mesoscopic ensembles of Rydberg atoms lies in the fact that the excitation of one atom to a Rydberg state blocks the excitation of other atoms due to the shift in the collective energy levels of interacting Rydberg atoms. It is used to obtain the entangled qubit states based on single neutral atoms in optical traps. In this paper, we present our experimental results on the observation of the dipole blockade for mesoscopic ensembles of 1-5 atoms when they are detected by the selective field ionization method. We investigated the spectra of the three-photon laser excitation $ 5S_{1/2} \to 5P_{3/2} \to 6S_{1/2} \to nP_{3/2} $ of cold Rb Rydberg atoms in a magneto-optical trap. We have found that for mesoscopic ensembles this method allows only a partial dipole blockage to be observed. This is most likely related to the presence of parasitic electric fields reducing the interaction energy of Rydberg atoms, the decrease in the probability of detecting high states, and the strong angular dependence of the interaction energy of Rydberg atoms in a single interaction volume.
description: 16 pages, 7 figures
Interaktive Programmierungsansätze für die Gestaltung von Agrar- und Umweltprogrammen
Creators: name: Kirschke, Dieter
name: Jechlitschka, Kurt
name: Kirschke, Dieter
name: Jechlitschka, Kurt
Publisher: name: Unknown
Year: 2003
Subjects: subject: Agricultural and Food Policy
subject: Environmental Economics and Policy
subject: Agricultural and environmental programmes
subject: EU agricultural policy
subject: decision-making support
subject: linear programming
subject: policy support

description: Planning agricultural and environmental programmes has become a complex task. In this paper we show how interactive programming can help to solve such complex policy decision-making problems. The basic linear programming model is implemented with Excel. We show, for a hypothetical agricultural and environmental programme, how the approach can be used in an interactive way between scientists and policy decision-makers. The approach allows to visually demonstrate and quickly assess the consequences of changing assumptions and framework conditions on the programme design. It could effectively improve the quality of policy decision-making support; it requires the actors’ willingness, of course, to engage in a real dialogue.
Chiral and U(1)_A restorations high in the hadron spectrum, semiclassical approximation and large N_c
Creators: name: Glozman, L. Ya.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Theory (hep-th)
subject: Nuclear Experiment (nucl-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: In quantum systems with large $n$ (radial quantum number) or large angular momentum the semiclassical (WKB) approximation is valid. A physical content of the semiclassical approximation is that the quantum fluctuations effects are suppressed and vanish asymptotically. The chiral as well as $U(1)_A$ breakings in QCD result from quantum fluctuations. Hence these breakings must be suppressed high in the spectrum and the spectrum of high-lying hadrons must exhibit $U(2)_L \times U(2)_R$ symmetry of the classical QCD Lagrangian. This argument can be made stronger for mesons in the large $N_c$ limit. In this limit all mesons are stable against strong decays and the spectrum is infinite. Hence, one can excite mesons of arbitrary large size with arbitrary large action, in which case the semiclassical limit is manifest. Actually we do not need the exact $N_c=\infty$ limit. For any large action there always exist such $N_c$ that the isolated mesons with such an action do exist and can be described semiclassically. From the empirical fact that we observe multiplets of chiral and $U(1)_A$ groups high in the hadron spectrum it follows that $N_c=3$ is large enough for this purpose.
description: 11 pages. The ms has been expanded to be a full length regular paper. A few Tables have been added. A list of references has been extended. To appear in Int. J. Mod. Phys. A
Additional file 1 of Publication and related biases in health services research: a systematic review of empirical evidence
Creators: name: Abimbola A. Ayorinde
name: Williams, Iestyn
name: Mannion, Russell
name: Fujian Song
name: Skrybant, Magdalena
name: Lilford, Richard J.
name: Chen, Yen-Fu
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Biotechnology
subject: Sociology
subject: FOS: Sociology
subject: Cancer
subject: Science Policy

description: Additional file 1. PRISMA checklist.
Extremes on Trees
Creators: name: Hsing, Tailen
name: Rootzen, Holger
Publisher: name: arXiv
Year: 2005
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60D05, 60F05 (Primary)

description: This paper considers the asymptotic distribution of the longest edge of the minimal spanning tree and nearest neighbor graph on X_1,...,X_{N_n} where X_1,X_2,... are i.i.d. in \Re^2 with distribution F and N_n is independent of the X_i and satisfies N_n/n\to_p1. A new approach based on spatial blocking and a locally orthogonal coordinate system is developed to treat cases for which F has unbounded support. The general results are applied to a number of special cases, including elliptically contoured distributions, distributions with independent Weibull-like margins and distributions with parallel level curves.
description: Published at http://dx.doi.org/10.1214/009117904000001008 in the Annals of Probability (http://www.imstat.org/aop/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Additional file 2 of Publication and related biases in health services research: a systematic review of empirical evidence
Creators: name: Abimbola A. Ayorinde
name: Williams, Iestyn
name: Mannion, Russell
name: Fujian Song
name: Skrybant, Magdalena
name: Lilford, Richard J.
name: Chen, Yen-Fu
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Biotechnology
subject: Sociology
subject: FOS: Sociology
subject: Cancer
subject: Science Policy

description: Additional file 2. Appendices.
Analysis of Trade and Environmental Policy Options on the Basis of a National Agricultural Sector Model with Multifunctional Outputs
Creators: name: Weber, Gerald
name: Weber, Gerald
Publisher: name: Unknown
Year: 2003
Subjects: subject: Agricultural and Food Policy
subject: Environmental Economics and Policy
subject: International Relations/Trade
subject: environmental costs
subject: multifunctional agriculture
subject: policy analysis
subject: agricultural sector modelling

description: Studies on liberalisation normally do not take into account the external benefits and costs of agriculture. Empirical studies on the valuation of externalities should be integrated into quantitative modelling. MULTSIM is a national supply model of agriculture. Besides commodity output the model depicts also external benefit linked to landscape preservation and external environmental costs of agriculture. Internalisation scenarios are defined showing that the reduction of commodity-linked support and the introduction of land subsidies and intermediate input taxes have differentiated impacts on the farm types’ competitiveness. A comprehensive policy approach to multifunctional agriculture requires market feedbacks to be taken into account. Internalising externalities may lead to a strong reduction of commodity output quantities. This gives rise to expectations that commodity prices would increase, which in turn would dampen the production impacts. As a consequence MULTSIM should be regarded as a bridge tool that may be linked to microeconomic based multi market models and agricultural trade models. A further strain of model development is an improved consideration of multiple policy objectives.
Competiveness of Latin American Exports in the U.S. Banana Market
Creators: name: Muhammad, Andrew
name: Fonsah, Esendugue Greg
name: Zahniser, Steven
name: Muhammad, Andrew
name: Fonsah, Esendugue Greg
name: Zahniser, Steven
Publisher: name: Unknown
Year: 2011
Subjects: subject: Demand and Price Analysis
subject: International Relations/Trade
subject: bananas
subject: imports
subject: demand
subject: Latin America
subject: United States

description: U.S. banana demand differentiated by country of origin is estimated using the generalized dynamic Rotterdam model. Results indicate that dynamic factors play a significant role in determining the allocation of U.S. banana expenditures across exporting sources. Of particular interest is Guatemala’s increased share and Costa Rica’s decreased share of U.S. banana supply. A number of factors explained why Guatemala replaced Costa Rica as the leading U.S. supplier in 2007. (1) Guatemala is the least expensive source on average. (2) Habit persistence, adjustment costs, and other dynamic factors favor Guatemala’s exports. (3) Given increases in the relative price of Costa Rica’s bananas, the price competition between Costa Rica and Guatemala is highly significant. (4) Bananas from Costa Rica are highly responsive to own-price while imports from Guatemala are more price-inelastic. (5) Heavy rains and fluctuating temperatures in Costa Rica have decreased banana production and exports.
Superconformal Black Hole Quantum Mechanics
Creators: name: Gaiotto, Davide
name: Strominger, Andrew
name: Yin, Xi
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In recent work, the superconformal quantum mechanics describing D0 branes in the AdS_2xS^2xCY_3 attractor geometry of a Calabi-Yau black hole with D4 brane charges p^A has been constructed and found to contain a large degeneracy of chiral primary bound states. In this paper it is shown that the asymptotic growth of chiral primaries for N D0 branes exactly matches the Bekenstein-Hawking area law for a black hole with D4 brane charge p^A and D0 brane charge N. This large degeneracy arises from D0 branes in lowest Landau levels which tile the CY_3xS^2 horizon. It is conjectured that such a multi-D0 brane CFT1 is holographically dual to IIA string theory on AdS_2xS^2xCY_3.
description: 8 pages
An electronic Mach-Zehnder interferometer in the Fractional Quantum Hall effect
Creators: name: Jonckheere, Thibaut
name: Devillard, Pierre
name: Crepieux, Adeline
name: Martin, Thierry
Publisher: name: arXiv
Year: 2005
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We compute the interference pattern of a Mach-Zehnder interferometer operating in the fractional quantum Hall effect. Our theoretical proposal is inspired by a remarkable experiment on edge states in the Integer Quantum Hall effect (IQHE). The Luttinger liquid model is solved via two independent methods: refermionization at nu=1/2 and the Bethe Ansatz solution available for Laughlin fractions. The current differs strongly from that of single electrons in the strong backscattering regime. The Fano factor is periodic in the flux, and it exhibits a sharp transition from sub-Poissonian (charge e/2) to Poissonian (charge e) in the neighborhood of destructive interferences.
Lepton Flavour Violation in the Minimal SO(10) GUT Model and in the Standard Model with additional Heavy Dirac Neutrinos
Creators: name: Fukuyama, Takeshi
name: Ilakovac, Amon
name: Kikuchi, Tatsuru
name: Meljanac, Stjepan
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Lepton flavour violation is considered in two models, Standard Model with additional heavy Dirac neutrinos and minimal supersymmetric standard model (MSSM) with SO(10) theoretical frame and minimal SUGRA (mSUGRA) SUSY-breaking mediation mechanism. The models are briefly explained. The structure of the amplitudes for neutrinoless decays of the lepton into a lepton and semileptonic neutrinoless decays of a lepton is given. The method for identification of meson content in the quark currents is exposed. The comparison of the amplitudes is made showing which of the processes have the largest branching ratios. The numerical results for the dominant decay rates are presented.
description: Invited talk at the Eigth International Workshop on Tau Lepton Physics (Tau04), Nara new public hall, Nara, Japan 14-17 September,2004, 6 pages, LaTeX
An analysis of the determinants of flood damages
Creators: name: Ferreira, Susana
name: Ferreira, Susana
Publisher: name: Unknown
Year: 2010
Subjects: subject: Environmental Economics and Policy
subject: International Development
subject: Land Economics/Use
subject: Risk and Uncertainty
subject: Natural Disasters
subject: Floods
subject: Mortality
subject: Adaptation
subject: Climate Change

description: In this paper we analyze mortality caused by 2,194 large flood events between 1985 and 2008 in 108 countries. Unlike previous studies that looked at natural-disaster mortality, we find that year-to-year changes in income and institutional determinants of vulnerability do not affect flood mortality directly. Income and institutions influence mortality only indirectly, through their impact on the intensity and frequency of floods. Population exposure affects the number of deaths both directly and indirectly. Higher population exposure results in more deaths once the flood has occurred, but it is associated with smaller floods. In developing countries it also reduces the count of floods.
The Impact of Agriculture on Waterfowl Abundance: Evidence from Panel Data
Creators: name: Wong, Linda
name: Van Kooten, G. Cornelis
name: Clarke, Judith A.
name: Wong, Linda
name: Van Kooten, G. Cornelis
name: Clarke, Judith A.
Publisher: name: Unknown
Year: 2011
Subjects: subject: Community/Rural/Urban Development
subject: Environmental Economics and Policy
subject: wetlands protection
subject: spatial econometrics
subject: GIS
subject: land use conflict
subject: migratory waterfowl

description: Agricultural expansion and intensification in Canada’s Prairie Pothole Region (PPR) have contributed to declining waterfowl populations since the 1970s. Although this region represents a mere 10% of North America’s waterfowl breeding habitat, it produces over 50% of the continent’s duck population and roughly 60% of Canada’s agricultural output. Thus, intense competition exists between private economic interests and public benefits in the PPR. To better understand the conflict between agricultural and wildlife uses of land, panel methods are used to examine the spatiotemporal variation of waterfowl populations and agricultural land use intensity in the PPR from 1961-2006. For the main static model, we find that a one percent increase in cropland or pasture decreases duck density by 6%, while a similar increase in summerfallow area decreases duck density by 7%. Estimates based on a dynamic specification are more conservative. For the lagged dependent variable model, a 1% increase in cropland and pasture decreases duck density by 4.6%, while a decline of 4.7% is predicted for increases in summerfallow area. The spatial autoregressive model allows the derivation of measures for assessing direct and indirect impacts. The estimated direct impacts fall between those obtained from the standard and dynamic models, but, when spillover effects are included, the impacts exceed those predicted by the standard model. It would appear that conserving wetlands in one location has the added benefit of increasing productivity of wetlands at other locations.
MPEC 2025-G114 : 2025 GJ1
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2025
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2025 GJ1

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Spectral and transport properties of a half-filled Anderson impurity coupled to phase-biased superconducting and metallic leads
Creators: name: Zalom, Peter
name: Pokorný, Vladislav
name: Novotný, Tomáš
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We derive and apply a general scheme for mapping a setup consisting of a half-filled single level quantum dot coupled to one normal metallic and two superconducting phase-biased leads onto an ordinary half-filled single impurity Anderson model with single modified tunneling density of states. The theory allows for the otherwise unfeasible application of the standard numerical renormalization group and enables to obtain phase-dependent local spectral properties as well as phase-dependent induced pairing and Josephson current. The resulting transport properties match well with the numerically exact continuous-time hybridization-expansion quantum Monte Carlo. For weakly coupled normal electrode, the spectral properties can be interpreted in terms of normal-electrode-broadened Andreev bound states with phase-dependent position analogous to the superconducting Anderson model, which coexist in the $π$-like phase with a Kondo peak whose phase-dependent Kondo temperature follows the form conjectured previously in Domański et al., Phys.~Rev.~B {\bf 95}, 045104 (2017)
description: 18 pages, 8 figures, submitted to Phys. Rev. B
Additional file 1 of A survey exploring ophthalmologists’ attitudes and beliefs in performing Immediately Sequential Bilateral Cataract Surgery in the United Kingdom
Creators: name: Eunkyung Lee
name: Bagishan Balasingam
name: Mills, Emily C.
name: Zarei-Ghanavati, Mehran
name: Liu, Christopher
Publisher: name: figshare
Year: 2020
Subjects: Medicine
Science Policy

description: Additional file 1.
The Coverage Overlapping Problem of Serving Arbitrary Crowds in 3D Drone Cellular Networks
Creators: name: Lai, Chuan-Chi
name: Wang, Li-Chun
name: Han, Zhu
Publisher: name: arXiv
Year: 2020
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: Systems and Control (eess.SY)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Providing coverage for flash crowds is an important application for drone base stations (DBSs). However, any arbitrary crowd is likely to be distributed at a high density. Under the condition for each DBS to serve the same number of ground users, multiple DBSs may be placed at the same horizontal location but different altitudes and will cause severe co-channel interference, to which we refer as the coverage overlapping problem. To solve this problem, we then proposed the data-driven 3D placement (DDP) and the enhanced DDP (eDDP) algorithms. The proposed DDP and eDDP can effectively find the appropriate number, altitude, location, and coverage of DBSs in the serving area in polynomial time to maximize the system sum rate and guarantee the minimum data rate requirement of the user equipment. The simulation results show that, compared with the balanced k-means approach, the proposed eDDP can increase the system sum rate by 200% and reduce the computation time by 50%. In particular, eDDP can effectively reduce the occurrence of the coverage overlapping problem and then outperform DDP by about 100% in terms of system sum rate.
description: 18 pages, 10 figures, to appear in IEEE Transactions on Mobile Computing. arXiv admin note: text overlap with arXiv:1909.11554
Repeated Cheap-Talk Games of Common Interest between a Decision-Maker and an Expert of Unknown Statistical Bias
Creators: name: Valsecchi, Irene
name: Valsecchi, Irene
Publisher: name: Unknown
Year: 2010
Subjects: subject: Financial Economics
subject: Opinion
subject: Expert
subject: Strategic Communication

description: Two agents are engaged in a joint activity that yields a common perperiod payoff at two rounds of play. The expert announces the probability that the current state of the world is low, instead of high, at each stage. Having received the report of the expert, the decision-maker takes action at every period according to his posterior beliefs. At the end of each round of play, the true current state is verifiable. The distinctive assumption of the paper is that the decision-maker makes a subjective appraisal of the expert’s reliability: he considers the expert’s true forecasts as the outcomes of an experiment of unknown statistical bias. The paper shows that the expert will have instrumental reputational concerns, related to the future estimate of the systematic error associated to his predictions. In contrast with previous work, reputational concerns are shown to enhance the credibility of the initial messages, and to increase both the agents’ expected payoff at the first round of play in equilibrium. The equilibrium messages will be noisy, but noisiness will be less costly than it would be in single-stage games.
Observational appearance of rapidly rotating neutron stars: X-ray bursts, cooling tail method, and radius determination
Creators: name: Suleimanov, Valery F.
name: Poutanen, Juri
name: Werner, Klaus
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Neutron stars (NSs) in low-mass X-ray binaries rotate at frequencies high enough to significantly deviate from sphericity ($ν_* \sim$ 200--600 Hz). We investigate the effects of rapid rotation on the observational appearance of a NS. We propose analytical formulae relating gravitational mass and equatorial radius of the rapidly rotating NS to the mass $M$ and radius $R$ of a non-rotating NS of the same baryonic mass using accurate fully relativistic computations. We compute spectra from an oblate rotating NS observed at different inclination angles using the modified oblate Schwarzschild (MOS) approximation, where light bending is computed in Schwarzschild metric, but frame dragging and quadrupole moment of a NS are approximately accounted for in the photon redshift calculations. We generalize the cooling tail method to the case of a rapidly rotating NS to obtain the most probable values of $M$ and $R$ of the corresponding non-rotating NS with the same baryonic mass. We approximate the local spectra from the NS surface by a diluted blackbody using previously computed NS atmosphere models. We show that the NS radius could be overestimated by 3--3.5 km for face-on stars of $R\approx 11$ km rotating at $ν_* =$ 700 Hz if the version of the cooling tail method for a non-rotating NS is used. We apply the method to an X-ray burst observed from the NS rotating at $ν_* \approx$ 532 Hz in SAX J1810.8$-$2609. The resulting radius of the non-rotating NS (assuming $M=1.5 M_\odot$) becomes $11.8\pm0.5$ km if it is viewed at inclination i=60 deg and $R=11.2\pm0.5$ km for a face-on view, which are smaller by 0.6 and 1.2 km than the radius obtained using standard cooling tail method ignoring rotation. The corresponding equatorial radii of these rapidly rotating NSs are 12.3$\pm 0.6$ km (for i=60 deg) and 11.6$\pm 0.6$\,km (for i=0 deg).
description: 17 pages, 16 figures, accepted for publication in Astronomy and Astrophysics
Canonical quantization and black hole perturbations
Creators: name: Perjes, Zoltan
name: Lukacs, Arpad
Publisher: name: arXiv
Year: 2005
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We examine the possibility of a constraint-free quantization of linearized gravity, based on the Teukolsky equation for black hole perturbations. We exhibit a simple quadratic (but complex) Lagrangian for the Teukolsky equation, leading to the interpretation that the elementary excitations (gravitons bound to the Kerr black hole) are unstable.
description: Contribution to the XIXth Max Born Symposium, Wroclaw. 10 pages, LaTeX, no figures
On the Blaschke conjecture for 3-webs
Creators: name: Goldberg, Vladislav V.
name: Lychagin, Valentin V.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 53A60

description: We find relative differential invariants of orders eight and nine for a planar nonparallelizable 3-web such that their vanishing is necessary and sufficient for a 3-web to be linearizable. This solves the Blaschke conjecture for 3-webs. As a side result, we show that the number of linearizations in the Gronwall conjecture does not exceed fifteen and give criteria for rigidity of 3-webs.
description: LaTeX, 52 pages
Magnons Parametric Pumping in Bulk Acoustic Waves Resonator
Creators: name: Alekseev, S. G.
name: Dizhur, S. E.
name: Polzikova, N. I.
name: Luzanov, V. A.
name: Raevskiy, A. O.
name: Orlov, A. P.
name: Kotov, V. A.
name: Nikitov, S. A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We report on the experimental observation of excitation and detection of parametric spin waves and spin currents in the bulk acoustic wave resonator. The hybrid resonator consists of ZnO piezoelectric film, yttrium iron garnet (YIG) films on gallium gadolinium garnet substrate, and a heavy metal Pt layer. Shear bulk acoustic waves are electrically excited in the ZnO layer due to piezoeffect at the resonant frequencies of the resonator. The magnetoelastic interaction in the YIG film emerges magnons (spin waves) excitation by acoustic waves either on resonator's eigenfrequencies or the half-value frequencies at supercritical power. We investigate acoustic pumping of magnons at the half-value frequencies and acoustic spin pumping from parametric magnons, using the inverse spin Hall effect in the Pt layer. The constant electric voltage in the Pt layer, depending on the frequency, the magnetic field, and the pump power, was systematically studied. We explain the low threshold obtained (~0.4 mW) by the high efficiency of electric power transmission into the acoustic wave in the resonator.
description: This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Applied Physics Letters Vol.117, Issue 7 and may be found at https://doi.org/10.1063/5.0022267
Monte Carlo simulations of bosonic reaction-diffusion systems
Creators: name: Park, Su-Chan
Publisher: name: arXiv
Year: 2004
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: An efficient Monte Carlo simulation method for bosonic reaction-diffusion systems which are mainly used in the renormalization group (RG) study is proposed. Using this method, one dimensional bosonic single species annihilation model is studied and, in turn, the results are compared with RG calculations. The numerical data are consistent with RG predictions. As a second application, a bosonic variant of the pair contact process with diffusion (PCPD) is simulated and shown to share the critical behavior with the PCPD. The invariance under the Galilean transformation of this boson model is also checked and discussion about the invariance in conjunction with other models are in order.
description: Published
The Public Management of Risk: Separating Ex Ante and Ex Post Monitors
Creators: name: Hiriart, Yolande
name: Martimort, David
name: Pouyet, Jerome
name: Hiriart, Yolande
name: Martimort, David
name: Pouyet, Jerome
Publisher: name: Unknown
Year: 2010
Subjects: subject: Financial Economics
subject: Risk Regulation
subject: Monitoring
subject: Capture
subject: Integration
subject: Separation

description: When a firm undertakes risky activities, the conflict between social and private incentives to implement safety care requires public intervention which can take the form of both monetary incentives but also ex ante or ex post monitoring, i.e., before or after an accident occurs. We delineate the optimal scope of monitoring depending on whether public monitors are benevolent or corruptible. We show that separating the ex ante and the ex post monitors increases the likelihood of ex post investigation, helps prevent capture and improves welfare.
Bluetooth receiver design based on Laurent’s decomposition
Creators: name: Ibrahim, Noha
Publisher: name: University of British Columbia
Year: 2010

description: Bluetooth is a widely used communication standard for wireless personal area networks (WPAN). The Bluetooth transmit signal is Gaussian frequency shift keying (GFSK) modulated. GFSK belongs to the family of continuous-phase modulation (CPM) signals, which achieve a good trade-off between power and bandwidth efficiency and, due to constant envelope modulation, allow for low-complexity transmitter implementation. Bluetooth devices often employ a simple discriminator receiver, which is highly suboptimum in terms of power efficiency compared to the optimum receiver. Other approaches proposed in the literature consider trellis-based detection using the Viterbi or forward-backward algorithm. These schemes achieve significant performance improvements over discriminator detectors while entailing a considerably higher computational complexity. The main challenges faced when designing a Bluetooth sequence detector is the varying modulation index, which results in a varying trellis structure, and the time-variant channel phase, making coherent detection which assumes perfect channel phase estimation an almost impossible task. In this research work, we present a receiver design for Bluetooth transmission based on Laurent's decomposition of the Bluetooth transmit signal. The main features of this receiver are its low-complexity compared to alternative solutions, its excellent performance close to the theoretical limit, and its high robustness against frequency offsets, phase noise, and modulation index variations, which are characteristic for lowcost Bluetooth devices. In particular, we show that the devised noncoherent decision feedback equalization receiver achieves a similar performance as a recently proposed 2-state noncoherent sequence detector, while it is advantageous in terms of complexity. The new receiver design is therefore highly attractive for a practical implementation.
Scalable module detection for attributed networks with applications to breast cancer
Creators: name: Yu, Han
name: Blair, Rachael Hageman
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Biophysics
subject: Genetics
subject: FOS: Biological sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics
subject: Cancer
subject: Science Policy
subject: Plant Biology

description: The objective of network module detection is to identify groups of nodes within a network structure that are tightly connected. Nodes in a network often have attributes (aka metadata) associated with them. It is often desirable to identify groups of nodes that are tightly connected in the network structure, but also have strong similarity in their attributes. Utilizing attribute information in module detection is a major challenge because it requires bridging the structural network with attribute data. A Weighted Fast Greedy (WFG) algorithm for attribute-based module detection is proposed. WFG utilizes logistic regression to bridge the structural and attribute spaces. The logistic function naturally emphasizes associations between attributes and network structure accordingly, and can be easily interpreted. A breast cancer application is presented that connects a protein–protein interaction network gene expression data and a survival outcome. This application demonstrates the importance of embedding attribute information into the community detection framework on a breast cancer dataset. Five modules were significant for survival and they contained known pathways and markers for cancer, including cell cycle, p53 pathway, BRCA1, BRCA2, and AURKB, among others. Whereas, neither the gene expression data nor the network structure alone gave rise to these cancer biomarkers and signatures.
Additional file 1 of Musculoskeletal pain stakeholder engagement and partnership development: determining patient-centered research priorities
Creators: name: Beneciuk, Jason M.
name: Verstandig, Dorothy
name: Taylor, Chuck
name: Scott, Doug
name: Levin, Joan
name: Osborne, Raine
name: Bialosky, Joel E.
name: Lentz, Trevor A.
name: Tava Buck
name: Davis, Anita L.
name: Harder, Christina
name: Beneciuk, Monika B.
name: Wittmer, Virgil
name: Sylvester, James
name: Rowe, Robert
name: McInnes, David
name: Fisher, Tad P.
name: McGarrie, Lisa
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Cancer
subject: Science Policy

description: Additional file 1.
Estimation of parameters of inverse Weibull distribution and application to multi-component stress-strength model
Creators: name: Jana, Nabakumar
name: Bera, Samadrita
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Space Science
subject: Genetics
subject: FOS: Biological sciences
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: 69999 Biological Sciences not elsewhere classified
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics
subject: 110309 Infectious Diseases
subject: FOS: Health sciences
subject: Plant Biology
subject: Computational Biology

description: The problem of estimation of the parameters of two-parameter inverse Weibull distributions has been considered. We establish existence and uniqueness of the maximum likelihood estimators of the scale and shape parameters. We derive Bayes estimators of the parameters under the entropy loss function. Hierarchical Bayes estimator, equivariant estimator and a class of minimax estimators are derived when shape parameter is known. Ordered Bayes estimators using information about second population are also derived. We investigate the reliability of multi-component stress-strength model using classical and Bayesian approaches. Risk comparison of the classical and Bayes estimators is done using Monte Carlo simulations. Applications of the proposed estimators are shown using real data sets.
Properties of MgB2 thin films with carbon doping
Creators: name: Pogrebnyakov, A. V.
name: Xi, X. X.
name: Redwing, J. M.
name: Vaithyanathan, V.
name: Schlom, D. G.
name: Soukiassian, A.
name: Mi, S. B.
name: Jia, C. L.
name: Eom, C. B.
name: Chen, J.
name: Hu, Y. F.
name: Cui, Y.
name: Li, Q.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We have studied structural and superconducting properties of MgB2 thin films doped with carbon during the hybrid physical-chemical vapor deposition process. A carbon-containing metalorganic precursor bis(cyclopentadienyl)magnesium was added to the carrier gas to achieve carbon doping. As the amount of carbon in the films increases, the resistivity increases, Tc decreases, and the upper critical field increases dramatically as compared to the clean films. The self-field Jc in the carbon-doped films is lower than that in the clean films, but Jc remains relatively high to much higher magnetic fields, indicating stronger pinning. Structurally, the doped films are textured with nano-grains and highly resistive amorphous areas at the grain boundaries. The carbon doping approach can be used to produce MgB2 materials for high magnetic field applications.
description: 12 pages, 5 figures
Additional file 13 of MetaCNV - a consensus approach to infer accurate copy numbers from low coverage data
Creators: name: Friedrich, Stefanie
name: Barbulescu, Remus
name: Helleday, Thomas
name: Sonnhammer, Erik L. L.
Publisher: name: figshare
Year: 2020
Subjects: subject: Biochemistry
subject: Genetics
subject: FOS: Biological sciences
subject: Biotechnology
subject: Evolutionary Biology
subject: 69999 Biological Sciences not elsewhere classified
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: Cancer

description: Additional file 13. [23, 24, 32, 35–38].
Additional file 1 of Changes of hospitalization trend in the pediatric cardiology division of a single center by increasing adult with congenital heart disease
Creators: name: Sang-Yun Lee
name: Kim, Gi-Beom
name: Kwon, Hye-Won
name: Mi-Kyoung Song
name: Bae, Eun Jung
name: Sungkyu Cho
name: Kwak, Jae Gun
name: Hong-Gook Lim
name: Woong-Han Kim
name: Jeong-Ryul Lee
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Biotechnology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Science Policy
subject: Computational Biology

description: Additional file 1: Supplement table. Each diagnosis of adult patients with congenital heart disease was categorized as simple, complex, or unclassified based on the 32nd Bethesda Conference report [3].