cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Unveiling Defect-Mediated Carrier Dynamics in Monolayer Semiconductors by Spatiotemporal Microwave Imaging
Creators: name: Chu, Zhaodong
name: Wang, Chun-Yuan
name: Quan, Jiamin
name: Zhang, Chenhui
name: Lei, Chao
name: Han, Ali
name: Ma, Xuejian
name: Tang, Hao-Ling
name: Abeysinghe, Dishan
name: Staab, Matthew
name: Zhang, Xixiang
name: MacDonald, Allan H.
name: Tung, Vincent
name: Li, Xiaoqin
name: Shih, Chih-Kang
name: Lai, Keji
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The optoelectronic properties of atomically thin transition-metal dichalcogenides are strongly correlated with the presence of defects in the materials, which are not necessarily detrimental for certain applications. For instance, defects can lead to an enhanced photoconduction, a complicated process involving charge generation and recombination in the time domain and carrier transport in the spatial domain. Here, we report the simultaneous spatial and temporal photoconductivity imaging in two types of WS2 monolayers by laser-illuminated microwave impedance microscopy. The diffusion length and carrier lifetime were directly extracted from the spatial profile and temporal relaxation of microwave signals respectively. Time-resolved experiments indicate that the critical process for photo-excited carriers is the escape of holes from trap states, which prolongs the apparent lifetime of mobile electrons in the conduction band. As a result, counterintuitively, the photoconductivity is stronger in CVD samples than exfoliated monolayers with a lower defect density. Our work reveals the intrinsic time and length scales of electrical response to photo-excitation in van der Waals materials, which is essential for their applications in novel optoelectronic devices.
description: 21 pages, 4 figures
Hypercyclic Operators on Hilbert C*-modules
Creators: name: Ivkovic, Stefan
Publisher: name: arXiv
Year: 2023
Subjects: subject: Operator Algebras (math.OA)
subject: Functional Analysis (math.FA)
subject: FOS: Mathematics

description: In this paper, we characterize hypercyclic generalized bilateral weighted shift operators on the standard Hilbert module over the C*-algebra of compact operators on the separable Hilbert space. Moreover, we give necessary and sufficient conditions for these operators to be chaotic and we provide concrete examples. In addition, we characterize a class of hypercyclic operators on non-unital C*-algebras and we provide concrete examples.
Tanácskozás a tudományos publikációkról
Creators: name: Nemessályi, Zsolt
name: Nemessályi, Zsolt
Publisher: name: Unknown
Year: 2003
Subjects: Teaching/Communication/Extension/Profession

description: A mezőgazdasági tudományok területén kutatók publikációs lehetőségei nem rosszak. Számos magyar nyelvű lap és Magyarországon megjelenő idegen nyelvű folyó irat várja a közleményeket. Akiknek komoly tudományos eredményei' és tartalmas szakmai mondanivalója van, azoknak nem okoz gondot írásaik elhelyezése. A szerkesztők szívesen várnának több tudományos és gyakorlati szempontból is értékes cikket. A szerzők viszont hiányolják a közlemények magas impaktfaktorú lapokban való megjelentetésének lehetőségét. A magyar tudományos folyóiratok és szaklapok általában jól ismertek, elismertek, többségük mintegy fél évszázados múltra tekint vissza. Ennek ellenére a növénytermelés, állattenyésztés és az agrárökonómia területén alig található impaktfaktoros lap Magyarországon. A tanácskozáson résztvevő folyóiratok közül egyedül a Növénytermelés impaktfaktoros (0,3 körül), de a neves Állattenyésztés és Takarmányozás, Gazdálkodás pl. nem büszkélkedhet ezzel a megkülönböztető mérőszámmal. A mezőgazdaság területén a legmagasabb értékszámmal bíró Acta Veterinaria Hungarica-nak is csak 0,4 körüli az impakt faktora. Ezek a körülmények az alkalmazott mezőgazdasági tudományok területén kutatók számára határozott hátrányt jelentenek a publikációs versenyben. ---------------- The chances of Hungarian researchers in agricultural sciences to publish their papers are not bad. Numerous journals issued in Hungary, either in Hungarian or in foreign languages, are looking forward to their manuscripts. Authors whose scientific results are considerable and whose professional texts are worth publishing have no problem in this respect. Editors would like to get even more papers valuable in both scientific and practical respect. How ever, authors say they have little chance to publish their papers in journals of a really high impact factor. In general, Hungarian scientific journals and specialist periodicals are well-known and highly appreciated, the majority of them looking back to more or less half a century. In spite of this there is hardly any Hungarian journal on crop production, animal breeding and agricultural economics that has a satisfactory impact factor. Among the journals discussed at the conference it is only Növénytermelés [Crop production] that has an impact factor of ca. 0.3, whereas such renowned journals as Állattenyésztés és Takarmányozás [Animal Breeding and Feeding] and Gazdálkodás [Agricultural Economics] cannot boast of such a distinguishing index-number. Even the impact factor of Acta Veterinaria Hungarica, the journal with the highest index-number in the field of agriculture, has only an impact factor of ca. 0.4. The above circumstances constitute a definite disadvantage for Hungarian agricultural science researchers in the publication competition.
Solving equations in dense Sidon sets
Creators: name: Prendiville, Sean
Publisher: name: arXiv
Year: 2020
Subjects: subject: Combinatorics (math.CO)
subject: Number Theory (math.NT)
subject: FOS: Mathematics

description: We offer an alternative proof of a result of Conlon, Fox, Sudakov and Zhao on solving translation-invariant linear equations in dense Sidon sets. Our proof generalises to equations in more than five variables and yields effective bounds.
description: v2: Typos corrected and suggestions from correspondents incorporated
Encounters involving planetary systems in birth environments: the significant role of binaries
Creators: name: Li, Daohai
name: Mustill, Alexander J.
name: Davies, Melvyn B.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Most stars form in a clustered environment. Both single and binary stars will sometimes encounter planetary systems in such crowded environments. Encounter rates for binaries may be larger than for single stars, even for binary fractions as low as 10-20 per cent. In this work, we investigate scatterings between a Sun-Jupiter pair and both binary and single stars as in young clusters. We first perform a set of simulations of encounters involving wide ranges of binaries and single stars, finding that wider binaries have larger cross sections for the planet's ejection. Secondly, we consider such scatterings in a realistic population, drawing parameters for the binaries and single stars from the observed population. The scattering outcomes are diverse, including ejection, capture/exchange and collision. The binaries are more effective than single stars by a factor of several or more in causing the planet's ejection and collision. Hence, in a cluster, as long as the binary fraction is larger than about 10 per cent, the binaries will dominate the scatterings in terms of these two outcomes. For an open cluster of a stellar density 50 pc$^{-3}$, a lifetime 100 Myr and a binary fraction 0.5, we estimate that of the order of 1 per cent of the Jupiters are ejected, 0.1 per cent collide with a star, 0.1 per cent change ownership and 10 per cent of the Sun-Jupiter pairs acquire a stellar companion during scatterings. These companions are typically 1000s of au distant and in half of the cases (so 5 per cent of all Sun-Jupiter pairs), they can excite the planet's orbit through Kozai--Lidov mechanism before stripped by later encounters. Our result suggests that the Solar System may have once had a companion in its birth cluster.
description: to appear in MNRAS, 9 figures
Measurements of J/psi decays into phi pi^0, phi eta, and phi eta^prime
Creators: name: Ablikim, M.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Based on 5.8x10^7 J/psi events detected in BESII, the branching fractions of J/psi--> phi eta and phi eta^prime are measured for different eta and eta^prime decay modes. The results are significantly higher than previous measurements. An upper limit on B(J/psi--> phi pi^0) is also obtained.
description: 9 pages, 10 figures
Vorticity dynamics in transcritical liquid jet breakup
Creators: name: Poblador-Ibanez, Jordi
name: Sirignano, William
name: Hussain, Fazle
Publisher: name: arXiv
Year: 2023
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Contrary to common assumptions, a transcritical domain exists during the early times of liquid hydrocarbon fuel injection at supercritical pressure. A sharp two-phase interface is sustained before substantial heating of the liquid. Thus, two-phase dynamics has been shown to drive the early three-dimensional deformation and atomisation. A recent study of a transcritical liquid jet shows distinct deformation features caused by interface thermodynamics, low surface tension, and intraphase diffusive mixing. In the present work, the vortex identification method $λ_ρ$, which considers the fluid compressibility, is used to study the vortex dynamics in a cool liquid n-decane transcritical jet surrounded by a hotter oxygen gaseous stream at supercritical pressures. The relationship between vortical structures and the liquid surface evolution is detailed, along with the vorticity generation mechanisms, including variable-density effects. The roles of hairpin and roller vortices in the early deformation of lobes, the layering and tearing of liquid sheets, and the formation of fuel-rich gaseous blobs are analysed. At these high pressures, enhanced intraphase mixing and ambient gas dissolution affect the local liquid structures (i.e., lobes). Thus, liquid breakup differs from classical sub-critical atomisation. Near the interface, liquid density and viscosity drop by up to 10% and 70%, respectively, and the liquid is more easily affected by the vortical motion (e.g., liquid sheets wrap around vortices). Despite the variable density, compressible vorticity generation terms are smaller than the vortex stretching and tilting. Layering traps and aligns the vortices along the streamwise direction while mitigating the generation of new rollers.
description: 51 pages, 27 figures
Two-Loop Corrections to the Large-Order Behavior of Correlation Functions in the One-Dimensional N-Vector Model
Creators: name: Giorgini, L. T.
name: Jentschura, U. D.
name: Malatesta, E. M.
name: Parisi, G.
name: Rizzo, T.
name: Zinn-Justin, J.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: For a long time, the predictive limits of perturbative quantum field theory have been limited by our inability to carry out loop calculations to arbitrarily high order, which become increasingly complex as the order of perturbation theory is increased. This problem is exacerbated by the fact that perturbation series derived from loop diagram (Feynman diagram) calculations represent asymptotic (divergent) series which limits the predictive power of perturbative quantum field theory. Here, we discuss an ansatz which could overcome these limits, based on the observations that (i) for many phenomenologically relevant field theories, one can derive dispersion relations which relate the large-order growth (the asymptotic limit of "infinite loop order") with the imaginary part of arbitrary correlation functions, for negative coupling ("unstable vacuum"), and (ii) one can analyze the imaginary part for negative coupling in terms of classical field configurations (instantons). Unfortunately, the perturbation theory around instantons, which could lead to much more accurate predictions for the large-order behavior of Feynman diagrams, poses a number of technical as well as computational difficulties. Here, we study, to further the above mentioned ansatz, correlation functions in a one-dimensional (1D) field theory with a quartic self-interaction and an O(N) internal symmetry group, otherwise known as the 1D N-vector model. Our focus is on corrections to the large-order growth of perturbative coefficients, i.e., the limit of a large number of loops in the Feynman diagram expansion. We evaluate, in momentum space, the two-loop corrections for the two-point correlation function, and its derivative with respect to the momentum, as well as the two-point correlation function with a wigglet insertion. Also, we study the four-point function.
description: 27 pages; RevTeX
Additional file 1 of The neighborhood food environment modifies the effect of the 2009 WIC food package change on childhood obesity in Los Angeles County, California
Creators: name: Anderson, Christopher E.
name: Crespi, Catherine M.
name: Wang, May C.
name: Whaley, Shannon E.
name: Chaparro, M. Pia
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Physiology
subject: FOS: Biological sciences
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: Cancer
subject: Science Policy
subject: 60506 Virology

description: Additional file 1: Supplemental Table 1. Risk ratio for obesity at age 4 in boys and girls in Los Angeles County, California (N=148,634) by density of healthy and unhealthy food outlets in neighborhood of residence1.
Dust depleted inner disks in a large sample of transition disks through long-baseline ALMA observations
Creators: name: Francis, Logan
name: van der Marel, Nienke
Publisher: name: arXiv
Year: 2020
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Transition disks with large inner dust cavities are thought to host massive companions. However, the disk structure inside the companion orbit and how material flows toward an actively accreting star remain unclear. We present a high resolution continuum study of inner disks in the cavities of 38 transition disks. Measurements of the dust mass from archival Atacama Large Millimeter/Submillimeter Array observations are combined with stellar properties and spectral energy distributions to assemble a detailed picture of the inner disk. An inner dust disk is detected in 18 of 38 disks in our sample. Of the 14 resolved disks, 9 are significantly misaligned with the outer disk. The near-infrared excess is uncorrelated with the mm dust mass of the inner disk. The size-luminosity correlation known for protoplanetary disks is recovered for the inner disks as well, consistent with radial drift. The inner disks are depleted in dust relative to the outer disk and their dust mass is uncorrelated with the accretion rates. This is interpreted as the result of radial drift and trapping by planets in a low $α$ ($\sim 10^{-3}$) disk, or a failure of the $α$-disk model to describe angular momentum transport and accretion. The only disk in our sample with confirmed planets in the gap, PDS 70, has an inner disk with a significantly larger radius and lower inferred gas-to-dust ratio than other disks in the sample. We hypothesize that these inner disk properties and the detection of planets are due to the gap having only been opened recently by young, actively accreting planets.
description: 31 pages, 14 figures, accepted for publication in the Astrophysical Journal, minor corrections
Additional file 1 of Discovery of thermophilic Bacillales using reduced-representation genotyping for identification
Creators: name: Talamantes-Becerra, Berenice
name: Carling, Jason
name: Kilian, Andrzej
name: Georges, Arthur
Publisher: name: figshare
Year: 2020
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 1.
Dependency-Aware Release Planning for Software Projects using Fuzzy Graphs and Integer Programming
Creators: name: Mougouei, Davoud
name: Powers, David M W
Publisher: name: arXiv
Year: 2020
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: Software Release Planning (SRP) is to find, for the software, a subset of the requirements with the highest value while respecting the budget. The value of a requirement however may, to various degrees, depend on selecting or ignoring other requirements. However, existing SRP models ignore either Value-Related Dependencies altogether or the strengths of those dependencies even if they consider them. This paper presents an Integer Programming model for software release planning, which considers the variances of strengths of positive and negative value-related dependencies among software requirements. To capture the imprecision associated with strengths of value-related dependencies we have made use of the algebraic structure of fuzzy graphs. We have further, contributed a scalable technique for automated identification of value-related dependencies based on user preferences for software requirements. The validity of the work is verified through simulations.
Causal Effect of Off-Farm Activity and Technology Adoption on Food Security in Nigeria
Creators: name: Obisesan, Adekemi A.
name: Obisesan, Adekemi A.
Publisher: name: Unknown
Year: 2015
Subjects: subject: Agricultural and Food Policy
subject: Community/Rural/Urban Development
subject: Crop Production/Industries
subject: International Development
subject: Land Economics/Use
subject: Political Economy
subject: Off-farm work
subject: adoption
subject: food security
subject: rural Nigeria.

description: This study examined off-farm activity participation, technology adoption and impact on food security status of Nigerian farming households. Data were collected using structured questionnaire through a multistage sampling technique. Propensity Score Matching, descriptive statistics and Foster-Greer-Thorbecke weighted index were employed in analysis. Participation in off-farm activity has a positive and significant (p<0.05) influence on level of adoption. The mean per capita household food expenditure (MPCHFE) was ₦30198.34 while the food insecurity line was ₦20132.22 per annum. The impact of improved technology adoption on food insecurity incidence of adopters with off-farm activity was higher than their counterparts without participation. This suggests that participation in off-farm activity and technology adoption have the potential to improve food security. Hence, there should be further sensitization on this technology to improve food security and policy measures should also be oriented towards the support and improvement of rural off-farm income opportunities.
Strengthening science, technology, and innovation-based incubators to help achieve Sustainable Development Goals: Lessons from India
Creators: name: Surana, Kavita
name: Singh, Anuraag
name: Sagar, Ambuj D
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Economics (econ.GN)
subject: FOS: Economics and business

description: Policymakers in developing countries increasingly see science, technology, and innovation (STI) as an avenue for meeting sustainable development goals (SDGs), with STI-based startups as a key part of these efforts. Market failures call for government interventions in supporting STI for SDGs and publicly-funded incubators can potentially fulfil this role. Using the specific case of India, we examine how publicly-funded incubators could contribute to strengthening STI-based entrepreneurship. India's STI policy and its links to societal goals span multiple decades -- but since 2015 these goals became formally organized around the SDGs. We examine why STI-based incubators were created under different policy priorities before 2015, the role of public agencies in implementing these policies, and how some incubators were particularly effective in addressing the societal challenges that can now be mapped to SDGs. We find that effective incubation for supporting STI-based entrepreneurship to meet societal goals extended beyond traditional incubation activities. For STI-based incubators to be effective, policymakers must strengthen the 'incubation system'. This involves incorporating targeted SDGs in specific incubator goals, promoting coordination between existing incubator programs, developing a performance monitoring system, and finally, extending extensive capacity building at multiple levels including for incubator managers and for broader STI in the country.
Ensemble-learning error mitigation for variational quantum shallow-circuit classifiers
Creators: name: Li, Qingyu
name: Huang, Yuhan
name: Hou, Xiaokai
name: Li, Ying
name: Wang, Xiaoting
name: Bayat, Abolfazl
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Classification is one of the main applications of supervised learning. Recent advancement in developing quantum computers has opened a new possibility for machine learning on such machines. Due to the noisy performance of near-term quantum computers, error mitigation techniques are essential for extracting meaningful data from noisy raw experimental measurements. Here, we propose two ensemble-learning error mitigation methods, namely bootstrap aggregating and adaptive boosting, which can significantly enhance the performance of variational quantum classifiers for both classical and quantum datasets. The idea is to combine several weak classifiers, each implemented on a shallow noisy quantum circuit, to make a strong one with high accuracy. While both of our protocols substantially outperform error-mitigated primitive classifiers, the adaptive boosting shows better performance than the bootstrap aggregating. The protocols have been exemplified for classical handwriting digits as well as quantum phase discrimination of a symmetry-protected topological Hamiltonian, in which we observe a significant improvement in accuracy. Our ensemble-learning methods provide a systematic way of utilising shallow circuits to solve complex classification problems.
description: 14 pages, 6 figures
Testing for Chaos in Deterministic Systems with Noise
Creators: name: Gottwald, Georg A.
name: Melbourne, Ian
Publisher: name: arXiv
Year: 2004
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: Recently, we introduced a new test for distinguishing regular from chaotic dynamics in deterministic dynamical systems and argued that the test had certain advantages over the traditional test for chaos using the maximal Lyapunov exponent. In this paper, we investigate the capability of the test to cope with moderate amounts of noisy data. Comparisons are made between an improved version of our test and both the ``tangent space'' and ``direct method'' for computing the maximal Lyapunov exponent. The evidence of numerical experiments, ranging from the logistic map to an eight-dimensional Lorenz system of differential equations (the Lorenz 96 system), suggests that our method is superior to tangent space methods and that it compares very favourably with direct methods.
Crops Rotation – the Solution of Environmental Problems (a Case Study of Prince Edward Island in Canada)
Creators: name: Procházka, Petr
name: Řezbová, Helena
name: Smutka, Luboš
name: Procházka, Petr
name: Řezbová, Helena
name: Smutka, Luboš
Publisher: name: Unknown
Year: 2015
Subjects: subject: Consumer/Household Economics
subject: Crop Production/Industries
subject: Food Security and Poverty
subject: Land Economics/Use
subject: Optimal control theory
subject: mandatory crop rotation
subject: environmental policy
subject: agriculture
subject: potato producers
subject: economy impact.

description: Prince Edward Island (PEI) is well known around the world for its potato industry. While economically beneficial for PEI, potato production contributes to its environmental deterioration. This can be attributed to the high use of chemicals and fertilizers in the production, which leads to the pollution of PEI’s watercourses. In response to the environmental crisis, the PEI provincial government proposed several land use policies to mitigate the negative influence of potato production on water quality. One of the policies that is analyzed in this paper is a mandated crop rotation. The analysis of the mandatory crop rotation policy is achieved through the application of optimal control theory and dynamic programming. Findings from the co-integration model show that agriculture is most likely responsible for watercourse pollution in PEI. This provides statistical evidence that a policy aimed at water protection, specifically targeting potato land use is necessary. However the application of environmentally friendly approach (mandatory crops rotation) is positive, its negative impact on individual farms economy is evident.
Nonlinear waves on the surface of a dielectric liquid in a strong tangential electric field
Creators: name: Zubarev, Nikolay M.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: The nonlinear dynamics of the free surface of an ideal dielectric liquid in a strong electric field is studied. The equation for the evolution of surface electrohydrodynamic waves is derived in the approximation of small surface-slope angles. It is established that the equation can be solved for liquids with sufficiently high values of the permittivity. This makes it possible to describe the interaction of the counter-propagating waves.
description: 10 pages. accepted to Phys. Lett. A
Pulse reverse-engineering for strong field-matter interaction
Creators: name: Ran, Du
name: Zhang, Bin
name: Chen, Ye-Hong
name: Shi, Zhi-Cheng
name: Xia, Yan
name: Ianconescu, Reuven
name: Scheuer, Jacob
name: Gover, Avraham
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We propose a scheme to control the evolution of a two-level quantum system in the strong coupling regime based on the idea of reverse-engineering. A coherent control field is designed to drive both closed and open two-level quantum systems along user predefined evolution trajectory without utilizing the rotating-wave approximation (RWA). As concrete examples, we show that complete population inversion, an equally weighted coherent superposition, and even oscillationlike dynamics can be achieved. As there are no limitations on the coupling strength between the control field and matter, the scheme is attractive for applications such as accelerating desired system dynamics and fast quantum information processing.
description: 4 pages, 4 figures
Dynamical nuclear polarization for dissipation-induced entanglement in NV centers
Creators: name: Khandelwal, Shishir
name: Kumar, Shashwat
name: Palazzo, Nicolas
name: Haack, Géraldine
name: Chipaux, Mayeul
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We propose a practical implementation of a two-qubit entanglement engine which denotes a scheme to generate quantum correlations through purely dissipative processes. On a diamond platform, the electron spin transitions of two Nitrogen-Vacancy (NV) centers play the role of artificial atoms (qubits), interacting through a dipole-dipole Hamiltonian. The surrounding Carbon-13 nuclear spins act as spin baths playing the role of thermal reservoirs at well-defined temperatures and exchanging heat through the NV center qubits. In our scheme, a key challenge is therefore to create a temperature gradient between two spin baths surrounding each NV center, for which we propose the exploit the recent progresses in dynamical nuclear polarization, combined with microscopy superresolution methods. We discuss how these techniques should allow us to initialize such a long lasting out-of-equilibrium polarization situation between them, effectively leading to suitable conditions to run the entanglement engine successfully. Within a quantum master equation approach, we make theoretical predictions using state-of-the-art values for experimental parameters. We obtain promising values for the concurrence, reaching theoretical maxima.
description: 12 Pages, 3 Figures, 1 Table
SU(N) Wigner-Racah algebra for the matrix of second moments of embedded Gaussian unitary ensemble of random matrices
Creators: name: Kota, V. K. B.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Recently Pluhar and Weidenmueller [Ann. Phys. (N.Y.) Vol 297, 344 (2002)] showed that the eigenvectors of the matrix of second moments of embedded Gaussian unitary ensemble of random matrices generated by k-body interactions (EGUE(k)) for m fermions in N single particle states are SU(N) Wigner coefficients and derived also an expression for the eigenvalues. Going beyond this work, we will show that the eigenvalues of this matrix are square of a SU(N) Racah coefficient and thus the matrix of second moments of EGUE(k) is solved completely by SU(N) Wigner-Racah algebra.
description: 16 pages
Additional file 2 of Improving assent in health research: a rapid systematic review
Creators: name: Soll, Dominik
name: Guraiib, Maria Magdalena
name: Rollins, Nigel Campbell
name: Reis, Andreas Alois
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Biotechnology
subject: Sociology
subject: FOS: Sociology
subject: Science Policy

description: Additional file 2. PRISMA checklist.
Density Functional Theory for Block Copolymer Melts and Blends
Creators: name: Uneyama, Takashi
name: Doi, Masao
Publisher: name: arXiv
Year: 2004
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We derive an expression for the free energy of the blends of block copolymers expressed as a functional of the density distribution of the monomer of each block. The expression is a generalization of the Flory-Huggins-de Gennes theory for homo polymer blends, and also a generalization of the Ohta-Kawasaki theory for the melts of diblock copolymers. The expression can be used for any blends of homopolymers and block copolymers of any topological structure. The expression gives a fast and stable computational method to calculate the micro and macro phase separation of the blends of homopolymers and block copolymers.
description: 25 pages, 9 figures, will appear in Macromolecules
Dimension-free estimates on distances between subsets of volume $\varepsilon$ inside a unit-volume body
Creators: name: Ismailov, Abdulamin
name: Kanel-Belov, Alexei
name: Ivlev, Fyodor
Publisher: name: arXiv
Year: 2023
Subjects: subject: Metric Geometry (math.MG)
subject: FOS: Mathematics

description: Average distance between two points in a unit-volume body $K \subset \mathbb{R}^n$ tends to infinity as $n \to \infty$. However, for two small subsets of volume $\varepsilon > 0$ the situation is different. For unit-volume cubes and euclidean balls the largest distance is of order $\sqrt{-\ln \varepsilon}$, for simplexes and hyperoctahedrons $-$ of order $-\ln \varepsilon$, for $\ell_p$ balls with $p \in [1;2]$ $-$ of order $(-\ln \varepsilon)^{\frac{1}{p}}$. These estimates are not dependent on the dimensionality $n$. The goal of the paper is to study this phenomenon. Isoperimetric inequalities will play a key role in our approach.
MHigh temperature oxidation behaviour of the single crystal superalloy CMSX-10
Creators: name: Hegde, Subray R.
Publisher: name: University of British Columbia
Year: 2010

description: The gas turbine industry has sought to increase the operating temperature of turbines so as to achieve higher efficiency. The compositions of superalloys used in the critical components of engines are changing to improve their high temperature capabilities. Historically, efforts in improving the performance of superalloys, in general, have been focused only on the mechanical properties; predominantly, the creep resistance. Surface protection, though an important issue, has received less attention. The recent trend in the superalloy design is to reduce the chromium content and to increase additions of refractory metals such as Ta and Re. As a result, mechanical strength of the alloy has been considerably improved with little attention to corrosion resistance. The present work studies the high temperature oxidation behaviour of a 3rd generation single crystal superalloy, CMSX-10. In this work, a series of isothermal oxidation tests of the alloy were conducted in air using a thermo gravimetric analyser at temperatures ranging from 800 °C to 1250 °C. The mass gain versus time curve shows parabolic growth at short exposure, followed by sub-parabolic growth at longer times. The alloy exhibits a transition from parabolic oxidation to sub-parabolic oxidation behaviour at all temperatures. The mass gain versus temperature curve shows anomalous behaviour. Characterisation of the oxidised specimens revealed that this anomaly is attributable to the diffusion driven morphological changes of spinel and alumina phases in the subsurface. Chromium oxide (Cr₂O₃), which is considered to be a diffusion barrier, does not form in the oxidation of CMSX-10. However, the alloy forms continuous layers of spinel, NiAl₂O₄ and alumina when oxidised at temperatures above 1000 °C. Theses layers may act as a diffusion barrier at a later stage.
Gravidez na Adolescência e Planejamento de vida - Wallysson Correia Aniceto
Creators: name: Aniceto, Wallysson Correia
Publisher: name: figshare
Year: 2020
Subjects: subject: 111707 Family Care
subject: FOS: Health sciences
subject: 111710 Health Counselling
subject: 111712 Health Promotion

description: Com o tema “Gravidez na Adolescência e Planejamento de vida". No dia 05 de setembro de 2018, foi realizado uma visita à escola pública Jenny Gomes, no Rio de Janeiro - RJ.
 A atividade foi desenvolvida a fim de levar informação de métodos contraceptivos e esclarecer dúvidas sobre gravidez e como isso pode influenciar no planejamento de vida.
Additional file 1 of Improving assent in health research: a rapid systematic review
Creators: name: Soll, Dominik
name: Guraiib, Maria Magdalena
name: Rollins, Nigel Campbell
name: Reis, Andreas Alois
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Biotechnology
subject: Sociology
subject: FOS: Sociology
subject: Science Policy

description: Additional file 1 Table S1. Search strategies.
Narrow Pentaquark States in a Quark Model with Antisymmetrized Molecular Dynamics
Creators: name: Kanada-En'yo, Y.
name: Morimatsu, O.
name: Nishikawa, T.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The exotic baryon $Θ^+(uudd\bar{s})$ is studied with microscopic calculations in a quark model by using a method of antisymmetrized molecular dynamics(AMD). We predict narrow states, $J^π=1/2^+(I=0)$, $J^π=3/2^+(I=0)$, and $J^π=3/2^-(I=1)$, which nearly degenerate in a low-energy region of the $uudd\bar{s}$ system. We discuss $NK$ decay widths and estimate them to be $Γ< 7$ for the $J^π=\{1/2^+,3/2^+\}$, and $Γ<1$ MeV for the $J^π=3/2^-$ state.
description: Talk given at International Workshop on PENTAQUARK04, Spring-8, Hyogo, Japan, 20-23 Jul 2004
Supplementary document for Real-Time Frame-Registered Resonant Fluorescence Scanning Laser Ophthalmoscopy for Quantifying Static and Dynamic Cellular Properties in the Mouse Retina - 7360672.pdf
Creators: name: Song, Tianqi
name: Wang, Yao
name: Zhou, Yuxiang
name: Zhou, Mingliang
name: Ma, Yanhong
name: Ma, Donghan
name: Qu, Jia
name: Zhang, Jinyi
name: Zhang, Pengfei
Publisher: name: Optica Publishing Group
Year: 2025
Subjects: Biophysics
Animal Cell and Molecular Biology

description: Supplement
Photospheric Polarization Signatures From Long Gamma Ray Burst Simulations
Creators: name: Parsotan, Tyler
name: Lopez-Camara, Diego
name: Lazzati, Davide
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: A comprehensive understanding of Gamma Ray Bursts (GRBs) has been elusive due to the variety of questions surrounding the radiation mechanism at play in these events. Polarization measurements of GRBs can heavily constrain the relevant radiation mechanisms and the structure of the GRB jet; however, there is a limited number of theoretical predictions that observed GRB polarizations can be compared against. Here, we conduct radiative transfer calculations of a set of two dimensional relativistic hydrodynamic long GRB (LGRB) jet simulations, of a constant and a variable jet, using the Monte Carlo Radiation Transport (MCRaT) code. MCRaT has been enhanced by the inclusion of polarization; it has been first verified by reproducing a variety of results in the literature and then used to obtain the time integrated and resolved polarization degrees and angles of the synthetic LGRBs. While the obtained time-integrated polarization degrees {($\lesssim 1$\%)} are consistent with the constraints from the POLAR experiment, they are lower than other theoretical studies due to the lack of strong gradients in the model jet profiles that we use. The time resolved results suggests that GRBs with wide jets observed on axis will have small polarization degrees ($\lesssim 2\%$) and {constant polarization angles}, during the brightest portion of the light curve. GRBs observed off axis will have larger polarization degrees and polarization angles that change with the temporal structure of radiating shells in the outflow. We then place our results in the context of GRB prompt emission models and future LEAP and POLAR-2 GRB polarimetry detections.
description: 14 pages, 7 figures, final version after it has been accepted to ApJ
Stroboscopic two-stroke quantum heat engines
Creators: name: Molitor, Otavio A. D.
name: Landi, Gabriel T.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The formulation of models describing quantum versions of heat engines plays an important role in the quest toward establishing the laws of thermodynamics in the quantum regime. Of particular importance is the description of stroke-based engines which can operate at finite-time. In this paper we put forth a framework for describing stroboscopic, two-stroke engines, in generic quantum chains. The framework is a generalization of the so-called SWAP engine and is based on a collisional model, which alternates between pure heat and pure work strokes. The transient evolution towards a limit-cycle is also fully accounted for. Moreover, we show that once the limit-cycle has been reached, the energy of the internal sites of the chain no longer changes, with the heat currents being associated exclusively to the boundary sites. Using a combination of analytical and numerical methods, we show that this type of engine offers multiple ways of optimizing the output power, without affecting the efficiency. Finally, we also show that there exists an entire class of models, characterized by a specific type of inter-chain interaction, which always operate at Otto efficiency, irrespective of the operating conditions of the reservoirs.
Matter-Wave Solitons in an F=1 Spinor Bose-Einstein Condensate
Creators: name: Ieda, Jun'ichi
name: Miyakawa, Takahiko
name: Wadati, Miki
Publisher: name: arXiv
Year: 2004
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: Following our previous work [J. Ieda, T. Miyakawa, M. Wadati, cond-mat/0404569] on a novel integrable model describing soliton dynamics of an F=1 spinor Bose--Einstein condensate, we discuss in detail the properties of the multi-component system with spin-exchange interactions. The exact multiple bright soliton solutions are obtained for the system where the mean-field interaction is attractive (c_0 < 0) and the spin-exchange interaction is ferromagnetic (c_2 < 0). A complete classification of the one-soliton solution with respect to the spin states and an explicit formula of the two-soliton solution are presented. For solitons in polar state, there exists a variety of different shaped solutions including twin peaks. We show that a "singlet pair" density can be used to distinguish those energetically degenerate solitons. We also analyze collisional effects between solitons in the same or different spin state(s) by computing the asymptotic forms of their initial and final states. The result reveals that it is possible to manipulate the spin dynamics by controlling the parameters of colliding solitons.
description: 12 pages, 9 figures, to appear in J. Phys. Soc. Jpn. Vol.73 No.11 (2004)
Structure and fluctuations of the premelted liquid film of ice at the triple point
Creators: name: Benet, Jorge
name: Llombart, Pablo
name: Sanz, Eduardo
name: MacDowell, Luis G.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: FOS: Physical sciences

description: In this paper we study the structure of the ice/vapor interface in the neighborhood of the triple point for the TIP4P/2005 model. We probe the fluctuations of the ice/film and film/vapor surfaces that separate the liquid film from the coexisting bulk phases at basal, primary prismatic and secondary prismatic planes. The results are interpreted using a coupled sine Gordon plus Interface Hamiltonian model. At large length-scales, the two bounding surfaces are correlated and behave as a single complex ice/vapor interface. For small length, on the contrary, the ice/film and film/vapor surfaces behave very much like independent ice/water and water/vapor interfaces. The study suggests that the basal facet of the TIP4P/2005 model is smooth, the prismatic facet is close to a roughening transition, and the secondary prismatic facet is rough. For the faceted basal face, our fluctuation analysis allows us to estimate the step free energy in good agreement with experiment. Our results allow for a quantitative characterization of the extent to which the adsorbed quasi-liquid layer behaves as water, and explains experimental observations which reveal similar activation energies for crystals grown in bulk vapor or bulk water.
description: 39 pages, 7 figures
Accessibility of Rice Farmers to the Ghana School Feeding Programme and its Effect on Output
Creators: name: Shaibu, Abdul-Fatawu
name: Al-Hassan, R. M.
name: Shaibu, Abdul-Fatawu
name: Al-Hassan, R. M.
Publisher: name: Unknown
Year: 2015
Subjects: subject: Agricultural and Food Policy
subject: Community/Rural/Urban Development
subject: Food Consumption/Nutrition/Food Safety
subject: Food Security and Poverty
subject: Land Economics/Use
subject: Accessibility
subject: effect
subject: production
subject: Ghana School Feeding Programme and rice farmers

description: The Ghana School Feeding Programme (GSFP) is the Ghanaian version of a Home-Grown School Feeding Programme (HGSP) that has a mandate to give one hot meal a day to school children in public schools from kindergarten through to primary six. The programme was launched in 2005 with the goal of contributing to poverty reduction and increased food security in Ghana. One of the key objectives of the programme is to boost domestic food production by sourcing GSFP raw materials locally, and providing a sustainable market for local food producers in the community. To analyse accessibility of rice farmers to the Ghana School Feeding Programme and its effect on production in three districts of the Northern Region of Ghana, a formal cross section survey of 100 small holder rice farmers was conducted. The transcendental logarithmic production function was applied to analyse the programme’s effect on rice output in the three districts using access to the GSFP and other input variables. Our results show that farm labour, farm size, and fertilizer application were significant in increasing farmers’ output while access to the GSFP market was not. Again there is no significant difference between the output of those who had access to the school feeding programme and those who do not.
Effect of Low Proportion Ceiba Pentandra Biodiesel Blend on Performance, Combustion and Emission Characteristics of a CI Engine
Creators: name: R. Tamilselvan
Publisher: name: figshare
Year: 2020
Subjects: subject: 90201 Automotive Combustion and Fuel Engineering (incl. Alternative/Renewable Fuels)
subject: FOS: Environmental engineering
subject: 91305 Energy Generation, Conversion and Storage Engineering
subject: FOS: Mechanical engineering

description: The engine performance and emission investigations were carried out on a diesel engine with diesel and B10 (10% Ceiba Pentandra + 90% diesel), B20 (20% Ceiba Pentandra + 80% diesel) blended fuel. Blended fuels were shown in a VCR engine with various engine speeds to work out the brake power and emissions of the engine. Fuel consumption evaluation also has been composed throughout the investigational. NOx, HC, CO2, CO, and O2 emissions also have been together. The parameters differ with engine speed. Results exposed that at all engine speeds, brake power outputs for B10 fuel were like to petroleum product fuel. Emission reduced significantly for all the fuels, but the different emission parameters were shrunken with engine speed.
title: Paratexte_Guide de l'amateur de livres à vignettes (et à figures) du XVIIIe siècle
Creators: name: AmateurS
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2021

description: Paratexte
description: ID_PARA_00992
Full causal bulk viscous LRS Bianchi I with time varying constants
Creators: name: Belinchón, J. A.
Publisher: name: arXiv
Year: 2004
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In this paper we study the evolution of a LRS Bianchi I Universe, filled with a bulk viscous cosmological fluid in the presence of time varying constants "but" taking into account the effects of a c-variable into the curvature tensor. We find that the only physical models are those which ``constants'' $G$ and $c$ are growing functions on time $t$, while the cosmological constant $Λ$ is a negative decreasing function. In such solutions the energy density obeys the ultrastiff matter equation of state i.e. $ω=1$.
description: 29 pages, 24 figures