cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The signless Laplacian spectral radius of graphs with forbidding linear forests
Creators: name: Chen, Ming-Zhu
name: Liu, A-Ming
name: Zhang, Xiao-Dong
Publisher: name: arXiv
Year: 2020
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05C50

description: Turán type extremal problem is how to maximize the number of edges over all graphs which do not contain fixed forbidden subgraphs. Similarly, spectral Turán type extremal problem is how to maximize (signless Laplacian) spectral radius over all graphs which do not contain fixed subgraphs. In this paper, we first present a stability result for $k\cdot P_3$ in terms of the number of edges and then determine all extremal graphs maximizing the signless Laplacian spectral radius over all graphs which do not contain a fixed linear forest with at most two odd paths or $k\cdot P_3$ as a subgraph, respectively.
description: 14 pagew, 2 figures. arXiv admin note: text overlap with arXiv:1801.06763
Additional file 6 of Yields and costs of recruitment methods with participant phenotypic characteristics for a diabetes prevention research study in an underrepresented pediatric population
Creators: name: Wyst, Kiley B. Vander
name: Olson, Micah L.
name: Hooker, Elva
name: Soltero, Erica G.
name: Yolando P. Konopken
name: Keller, Colleen S.
name: Castro, Felipe G.
name: Williams, Allison N.
name: Fernández, Arlene D. R.
name: Patrick, Donald L.
name: Ayers, Stephanie L.
name: Houchun H. Hu
name: Peña, Armando
name: Janiel Pimentel
name: Knowler, William C.
name: Shaibi, Gabriel Q.
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Biotechnology
subject: Sociology
subject: FOS: Sociology
subject: Science Policy

description: Additional file 6: Supplemental Table 2. Baseline Characteristics of Latino Youth Randomized (N = 117) to a Diabetes Prevention Program by Recruitment Site.
Recent and Future Observations in the X-ray and Gamma-ray Bands: Chandra, Suzaku, GLAST, and NuSTAR
Creators: name: Madejski, Greg
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: This paper presents a brief overview of the accomplishments of the Chandra satellite that are shedding light on the origin of high energy particles in astrophysical sources, with the emphasis on clusters of galaxies. It also discusses the prospects for the new data to be collected with instruments recently launched - such as Suzaku - or those to be deployed in the near future, and this includes GLAST and NuSTAR.
description: To appear in "Astrophysical Sources of High Energy Particles and Radiation", eds. T. Bulik, B. Rudak, and G. Madejski, AIP Conference Proceedings, vol 801 (2005), proc. conf. in Torun, Poland, 20-24 June 2005
Nanoparticles as a possible moderator for an ultracold neutron source
Creators: name: Nesvizhevsky, V. V.
name: Pignol, G.
name: Protasov, K. V.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Ultracold and very cold neutrons (UCN and VCN) interact strongly with nanoparticles due to the similarity of their wavelengths and nanoparticles sizes. We analyze the hypothesis that this interaction can provide efficient cooling of neutrons by ultracold nanoparticles at certain experimental conditions, thus increasing the density of UCN by many orders of magnitude. The present analytical and numerical description of the problem is limited to the model of independent nanoparticles at zero temperature. Constraints of application of this model are discussed.
Additional file 4 of Yields and costs of recruitment methods with participant phenotypic characteristics for a diabetes prevention research study in an underrepresented pediatric population
Creators: name: Wyst, Kiley B. Vander
name: Olson, Micah L.
name: Hooker, Elva
name: Soltero, Erica G.
name: Yolando P. Konopken
name: Keller, Colleen S.
name: Castro, Felipe G.
name: Williams, Allison N.
name: Fernández, Arlene D. R.
name: Patrick, Donald L.
name: Ayers, Stephanie L.
name: Houchun H. Hu
name: Peña, Armando
name: Janiel Pimentel
name: Knowler, William C.
name: Shaibi, Gabriel Q.
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Biotechnology
subject: Sociology
subject: FOS: Sociology
subject: Science Policy

description: Additional file 4: Supplemental Figure 4. Example Letter Provided to Parent/Guardian of Ineligible Youth.
Merging clusters of galaxies observed with XMM-Newton
Creators: name: Belsole, E.
name: Sauvageot, J-L.
name: Pratt, G. W.
name: Bourdin, H.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present results from the XMM-Newton observations of our ongoing program on merging clusters. To date three clusters have been observed, covering the temporal sequence from early to late stage mergers: A1750, A2065 and A3921. Using spatially-resolved spectroscopy of discrete regions, hardness ratio and temperature maps, we show that all three clusters display a complex temperature structure. In the case of A1750, a double cluster, we argue that the observed temperature structure is not only related to the ongoing merger but also to previous merger events. A2065 seems an excellent example of a `compact merger', i.e. when the centres of the two clusters have just started to interact, producing a shock in the ICM. Using comparisons with numerical simulations and complementary optical data, the highly complex temperature structure evident in A3921 is interpreted as an off-axis merger between two unequal mass components. These results illustrate the complex physics of merger events. The relaxation time can be larger than the typical time between merger events, so that the present day morphology of clusters depends not only on on-going interaction but also on the more ancient formation history.
description: 10 pages, 3 figures. Use elsart.cls. Accepted for publication in Advances in Space Research. A version with full resolution figures can be found at http://www.star.bris.ac.uk/elena/cospar_3clusters.pdf
Self-learning Kinetic Monte-Carlo method: application to Cu(111)
Creators: name: Trushin, Oleg
name: Karim, Altaf
name: Kara, Abdelkader
name: Rahman, Talat S.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We present a novel way of performing kinetic Monte Carlo simulations which does not require an {\it a priori} list of diffusion processes and their associated energetics and reaction rates. Rather, at any time during the simulation, energetics for all possible (single or multi-atom) processes, within a specific interaction range, are either computed accurately using a saddle point search procedure, or retrieved from a database in which previously encountered processes are stored. This self-learning procedure enhances the speed of the simulations along with a substantial gain in reliability because of the inclusion of many-particle processes. Accompanying results from the application of the method to the case of two-dimensional Cu adatom-cluster diffusion and coalescence on Cu(111) with detailed statistics of involved atomistic processes and contributing diffusion coefficients attest to the suitability of the method for the purpose.
description: 18 pages, 9 figures
Single Particle Thermodynamics with Levitated Nanoparticles
Creators: name: Millen, James
name: Gieseler, Jan
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: This chapter is intended as a pedagogical introduction to the dynamics of optically levitated nanoparticles with a focus on the study of single particle thermodynamics. Much of the work studying thermodynamics with nano- and micro-particles has taken place in liquid, and this chapter will avoid reviewing this impressive body of work, focussing instead on studies of thermodynamics with nanoparticles levitated in a gas. For a recent literature review we refer the reader to Gieseler & Millen Entropy 20, 326 (2018). The authors will discuss extensions into the quantum regime where relevant throughout the chapter.
description: This article appears as a chapter in the book `Thermodynamics in the Quantum Regime' (eds. Binder F., Correa L., Gogolin C., Anders J., Adesso G.), vol. 195 of the 'Fundamental Theories of Physics' series (Springer). arXiv admin note: text overlap with arXiv:1805.02927
The modified Magnetohydrodynamic equations
Creators: name: Chaliasos, Evangelos
Publisher: name: arXiv
Year: 2005
Subjects: subject: Mathematical Physics (math-ph)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: After finding the really self-consistent electromagnetic equations for a plasma, we proceed in a similar fashion to find how the MHD equations have to be modified accordingly. Substantially this is done by replacing the "Lorentz" force equation by the correct (in our case) force equation. Formally we have to use the vector potential instead of the magnetic field intensity.The appearance of the formulae presented is the one of classical vector analysis. We thus find a set of eight (8) equations in eight (8) unknowns, as previously known concerning the tradditional MHD equations.
Measurement of Trace I-129 Concentrations in CsI Powder and Organic Liquid Scintillator with Accelerator Mass Spectrometry
Creators: name: Dong, K. J.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Levels of trace radiopurity in active detector materials is a subject of major concern in low-background experiments. Procedures were devised to measure trace concentrations of I-129 in the inorganic salt CsI as well as in organic liquid scintillator with Accelerator Mass Spectrometry (AMS) which leads to improvement in sensitivities by several orders of magnitude over other methods. No evidence of their existence in these materials were observed. Limits of < 6 X 10^{-13} g/g and < 2.6 X 10^{-17} g/g on the contaminations of I-129 in CsI and liquid scintillator, respectively, were derived.These are the first results in a research program whose goals are to develop techniques to measure trace radioactivity in detector materials by AMS.
description: Proceedings of 10th International Conference on Accelerator Mass Spectrometry
Descriptive Set Theory and $ω$-Powers of Finitary Languages
Creators: name: Finkel, Olivier
name: Lecomte, Dominique
Publisher: name: arXiv
Year: 2020
Subjects: subject: Logic in Computer Science (cs.LO)
subject: Logic (math.LO)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: The $ω$-power of a finitary language L over a finite alphabet $Σ$ is the language of infinite words over $Σ$ defined by L $\infty$ := {w 0 w 1. .. $\in$ $Σ$ $ω$ | $\forall$i $\in$ $ω$ w i $\in$ L}. The $ω$-powers appear very naturally in Theoretical Computer Science in the characterization of several classes of languages of infinite words accepted by various kinds of automata, like B{ü}chi automata or B{ü}chi pushdown automata. We survey some recent results about the links relating Descriptive Set Theory and $ω$-powers.
description: arXiv admin note: substantial text overlap with arXiv:2006.08174
Classical and semiclassical description of Rydberg excitons in cuprous oxide
Creators: name: Ertl, Jan
name: Rommel, Patric
name: Mom, Michel
name: Main, Jörg
name: Bayer, Manfred
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Chaotic Dynamics (nlin.CD)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Experimental and theoretical investigations of excitons in cuprous oxide have revealed a significant fine-structure splitting of the excitonic Rydberg states caused by a strong impact of the valence band structure. We provide a semiclassical interpretation of that splitting by investigating the classical dynamics of the excitonic electron-hole pair beyond the hydrogen-like model. Considering the slow motion of Rydberg excitons in coordinate space compared to the fast dynamics of quasispin and hole spin we use an adiabatic approach and energy surfaces in momentum space for the computation of the exciton dynamics. We observe quasi-periodic motion on near-integrable tori. Semiclassical torus quantization yields the energy regions of the fine-structure splitting of $n$-manifolds in agreement with quantum mechanical computations.
description: 5 pages, 3 figures
Lattice isomorphisms between projection lattices of von Neumann algebras
Creators: name: Mori, Michiya
Publisher: name: arXiv
Year: 2020
Subjects: subject: Operator Algebras (math.OA)
subject: Functional Analysis (math.FA)
subject: FOS: Mathematics

description: Generalizing von Neumann's result on type II$_1$ von Neumann algebras, we characterize lattice isomorphisms between projection lattices of arbitrary von Neumann algebras by means of ring isomorphisms between the algebras of locally measurable operators. Moreover, we give a complete description of ring isomorphisms of locally measurable operator algebras when the von Neumann algebras are without type II direct summands.
description: 21 pages
Isospin in Reaction Dynamics. The Case of Dissipative Collisions at Fermi Energies
Creators: name: Di Toro, M.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: A key question in the physics of unstable nuclei is the knowledge of the $EOS$ for asymmetric nuclear matter ($ANM$) away from normal conditions. We recall that the symmetry energy at low densities has important effects on the neutron skin structure, while the knowledge in high densities region is crucial for supernovae dynamics and neutron star properties. The $only$ way to probe such region of the isovector $EOS$ in terrestrial laboratories is through very dissipative collisions of asymmetric (up to exotic) heavy ions from low to relativistic energies. A general introduction to the topic is firstly presented. We pass then to a detailed discussion on the $neck-fragmentation$ process as the main dissipative mechanism at the Fermi energies and to the related isospin dynamics. From Stochastic Mean Field simulations the isospin effects on all the phases of the reaction dynamics are thoroughly analysed, from the fast nucleon emission to the mid-rapidity fragment formation up to the dynamical fission of the $spectator$ residues. Simulations have been performed with an increasing stiffness of the symmetry term of the $EOS$. Some differences have been noticed, especially for the fragment charge asymmetry. New isospin effects have been revealed from the correlation of fragment asymmetry with dynamical quantities at the freeze-out time. A series of isospin sensitive observables to be further measured are finally listed.
description: 16 pages, 6 figures, Contribution to the 5th Italy-Japan Symposium, Recent Achievements and Perspectives in Nuclear Physics, Naples Nov.3-7 2004, World Sci. in press. Latex in WorldSci/proc/style
The London Study of Vortex States in a Superconducting Film Due to a Magnetic Dot
Creators: name: Erdin, Serkan
Publisher: name: arXiv
Year: 2005
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Here we report a study of vortex states in a thin superconducting film with a magnetic dot grown upon it by means of a method based on London-Maxwell equations. Vortices with single quantum flux ($Φ_0 = h c / 2 e$), giant vortices (vortices with multiple flux) as well as antivortices (vortices with negative vorticity) are taken into consideration. It turns out that giant vortices occur, when the dot's size is sufficiently smaller ($R \leq 4.5 ξ$) than the effective penetration depth $Λ$. In the case of a dot with sufficiently large size ($R \geq 6 ξ$), the vortices with single quantum flux dominate the vortex states. Their geometrical patterns are predicted up to seven vortices. Our calculations do not show the spontaneous appearance of antivortices.
description: 17 figures
Coupled mode theory for photonic crystal cavity-waveguide interaction
Creators: name: Waks, Edo
name: Vuckovic, Jelena
Publisher: name: arXiv
Year: 2005
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We derive a coupled mode theory for the interaction of an optical cavity with a waveguide that includes waveguide dispersion. The theory can be applied to photonic crystal cavity waveguide structures. We derive an analytical solution to the add and drop spectra arising from such interactions in the limit of linear dispersion. In this limit, the spectra can accurately predict the cold cavity quality factor (Q) when the interaction is weak. We numerically solve the coupled mode equations for the case of a cavity interacting with the band edge of a periodic waveguide, where linear dispersion is no longer a good approximation. In this regime, the density of states can distort the add and drop spectra. This distortion can lead to more than an order of magnitude overestimation of the cavity Q.
Dynamical formation and stability of fermion-boson stars
Creators: name: Di Giovanni, Fabrizio
name: Fakhry, Saeed
name: Sanchis-Gual, Nicolas
name: Degollado, Juan Carlos
name: Font, José A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Gravitationally bound structures composed by fermions and scalar particles known as fermion-boson stars are regular and static configurations obtained by solving the coupled Einstein-Klein-Gordon-Euler (EKGE) system. In this work, we discuss one possible scenario through which these fermion-boson stars may form by solving numerically the EKGE system under the simplifying assumption of spherical symmetry. Our initial configurations assume an already existing neutron star surrounded by an accreting cloud of a massive and complex scalar field. The results of our simulations show that once part of the initial scalar field is expelled via gravitational cooling the system gradually oscillates around an equilibrium configuration that is asymptotically consistent with a static solution of the system. The formation of fermion-boson stars for large positive values of the coupling constant in the self-interaction term of the scalar-field potential reveal the presence of a node in the scalar field. This suggests that a fermionic core may help stabilize configurations with nodes in the bosonic sector, as happens for purely boson stars in which the ground state and the first excited state coexist.
description: 13 pages, 16 figures
Mitigating long transient time in deterministic systems by resetting
Creators: name: Ray, Arnob
name: Pal, Arnab
name: Ghosh, Dibakar
name: Dana, Syamal K.
name: Hens, Chittaranjan
Publisher: name: arXiv
Year: 2020
Subjects: subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: How long does a trajectory take to reach a stable equilibrium point in the basin of attraction of a dynamical system? This is a question of quite general interest, and has stimulated a lot of activities in dynamical and stochastic systems where the metric of this estimation is often known as the transient or first passage time. In nonlinear systems, one often experiences long transients due to their underlying dynamics. We apply resetting or restart, an emerging concept in statistical physics and stochastic process, to mitigate the detrimental effects of prolonged transients in deterministic dynamical systems. We show that stopping an ongoing process at intermittent time only to restart all over from a spatial control line, can dramatically expedite its completion, resulting in a huge decrease in mean transient time. Moreover, our study unfolds a net reduction in fluctuations around the mean. Our claim is established with detailed numerical studies on the Stuart-Landau limit cycle oscillator and chaotic Lorenz system under different resetting strategies. Our analysis opens up a door to control the mean and fluctuations in transient time by unifying the original dynamics with an external stochastic or periodic timer, and poses open questions on the optimal way to harness transients in dynamical systems.
description: 5 pages, 3 figures in the main text + Supplemental material of 13 pages, 7 figures
Additional file 2 of Delivering ‘tiny targets’ in a remote region of southern Chad: a cost analysis of tsetse control in the Mandoul sleeping sickness focus
Creators: name: Jean-Baptiste Rayaisse
name: Courtin, Fabrice
name: Mahamat Hisséne Mahamat
name: Mahamat Chérif
name: Yoni, Wilfrid
name: Nadmba M. O. Gadjibet
name: Mallaye Peka
name: Solano, Philippe
name: Torr, Steve J.
name: Shaw, Alexandra P. M.
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Ecology
subject: FOS: Biological sciences
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: Science Policy

description: Additional file 2: Text S2. Cost data collection protocol (in French).
Vortex signatures in annular Bose-Einstein condensates
Creators: name: Cozzini, M.
name: Jackson, B.
name: Stringari, S.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We consider a Bose-Einstein condensate confined in a ``Mexican hat'' potential, with a quartic minus quadratic radial dependence. We find conditions under which the ground state is annular in shape, with a hole in the center of the condensate. Rotation leads to the appearance of stable multiply-quantized vortices, giving rise to a superfluid flow around the ring. The collective modes of the system are explored both numerically and analytically using the Gross-Pitaevskii and hydrodynamic equations. Potential experimental schemes to detect vorticity are proposed and evaluated, which include measuring the splitting of collective mode frequencies, observing expansion following release from the trap, and probing the momentum distribution of the condensate.
description: 11 pages, 7 figures
Monferrer-Sala, Juan-Pedro und Urbán, Ángel (Hrsg.): Sacred Text
Creators: name: Kropp, Manfred
Publisher: name: Oriens christianus : Hefte für die Kunde des christlichen Orients
Year: 2024

description: Oriens christianus : Hefte für die Kunde des christlichen Orients, Bd. 97 (2013): Oriens christianus, Band 97
Fostering the responsible citizen : citizenship and sexuality in the Girl Guides of Canada, 1979-1999
Creators: name: Faingold, Elizabeth
Publisher: name: University of British Columbia
Year: 2009

description: The Girl Guides of Canada is a youth service organization, serving almost 10% of the Canadian female population aged 5-17, that aims to teach girls and young women to become responsible citizens. In this thesis, I review the curriculum of the Pathfinder branch (for girls and young women aged 12-15) of the Girl Guides of Canada. Using feminist, anti-racist, and queer perspectives, I treat "responsible citizenship" as a discursive concept and conduct a discourse analysis of the Pathfinder programme to discover how it attempts to gain the consent of girls and young women to particular definitions of responsible citizenship. Drawing on feminist citizenship theory developed by Yuval-Davis, Anthias, Alexander, and Ross, I argue that the state implicates select female citizens in nation building practices as biological reproducers and transmitters of culture. I also draw on theories of moral regulation extended by Sangster, Strange, and Loo to illustrate ways in which the state and voluntary organizations attempt to gain the consent of citizens to particular ways of being. I argue that, because its texts authorize particular definitions of responsible citizenship, the Pathfinder curriculum implicates girls and young women in capitalist nation building in Canada. Specifically, I argue that the Pathfinder programme normalizes heterosexuality, whiteness, and ability, and privileges middle-class values. I also demonstrate that a responsible citizen, according to the Pathfinder curriculum, performs caregiving and environmental stewardship as volunteer service, prepares to join the labour force, and is healthy, hygienic, cheerful and obedient. I raise questions about the nature of the organization's efforts to teach about sexism, racism, classism, ableism, homophobia and heterosexism, and suggest some ways in which the curriculum can attend to these social relations to develop a more inclusive image of the ideal responsible citizen. I also suggest a number of directions for future research.
The singing bridge: sonification of a stress-ribbon footbridge
Creators: name: Torresan, Christian
name: Bernardes, Gilberto
name: Restivo, Teresa
name: Caetano, Elsa
Publisher: name: Zenodo
Year: 2022

description: Supplementary material to the conference paper "The singing bridge: Sonification of a stress-ribbon footbridge" published at EAI ArtsIT 2022.
The essential role of surface pinning in the dynamics of charge density waves submitted to external dc fields
Creators: name: Bellec, E.
name: Jacques, V. L. R.
name: Caillaux, J.
name: Bolloc'h, D. Le
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: A Charge Density Wave (CDW) submitted to an electric field displays a strong shear deformation because of pinning at the lateral surfaces of the sample. This CDW transverse pinning was recently observed but has received little attention from a theoretical point of view until now despite important consequences on electrical conductivity properties. Here, we provide a description of this phenomenon by considering a CDW submitted to an external dc electric field and constrained by boundary conditions including both longitudinal pinning due to electrical contacts and transverse surface pinning. A simple formula for the CDW phase is obtained in 3D by using the Green function and image charges method. In addition, an analytical expression of the threshold field dependence on both length and sample cross section is obtained by considering the phase slip process. We show that the experimental data are well reproduced with this model and that bulk pinning can be neglected. This study shows that the dynamical properties of CDW systems could be mainly driven by boundary effects, despite the comparatively huge sample volumes.
description: 7 pages of main text, 7 pages of appendices 15 figures
Bausi, Alessandro und Gori, Alessandro: Tradizioni orientali del >>Martirio di Aretha
Creators: name: Kropp, Manfred
Publisher: name: Oriens christianus : Hefte für die Kunde des christlichen Orients
Year: 2024

description: Oriens christianus : Hefte für die Kunde des christlichen Orients, Bd. 97 (2013): Oriens christianus, Band 97
131. Double white dwarf mergers
Creators: name: Perryman, Michael
Publisher: name: Zenodo
Year: 2023

description: Gaia is making some fascinating contributions to the known occurrence of white dwarf–white dwarf binary systems, and on the observational consequences of the eventual merger of the two white dwarfs. The story involves gravitational waves, the unusual properties of `ultra-massive' white dwarfs, and the precursors of (some) type Ia supernovae.
Labridae Cuvier 1816
Creators: name: Cicimurri, David J.
name: Ebersole, Jun A.
name: Stringer, Gary L.
name: Starnes, James E.
name: Phillips, George E.
Publisher: name: Zenodo
Year: 2025
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Perciformes
Labridae

description: Labridae gen. et sp. indet.
Fig. 25O–T
Material examined
UNITED STATES OF AMERICA – Mississippi • 12 isolated teeth; Catahoula Formation; SC 2013.28.603 (12 specimens) • 7 tooth masses; Catahoula Formation; SC 2013.28.596 (Fig. 25O–Q), SC 2013.28.597 (Fig. 25R–T), SC 2013.28.598 to 28.602.
Description
Our sample includes fragments of pharyngeal plates and isolated teeth. The pharyngeal plate fragments consist of tightly packed teeth of differing sizes that form a roughly contiguous surface. In cross section, up to four sets of replacement teeth are visible (Fig. 25Q, T). Teeth were apparently not replaced at a regular rate, as newer (replacement) teeth are intermingled with older functional teeth (Fig. 25O, R). In profile view, individual teeth can be low with a convex occlusal surface or high with a globular appearance. In occlusal/basal view, they have a circular to oval outline. Teeth essentially consist of a very thick enameloid cap with an open pulp cavity free of dentine (Fig. 25P, S).
Remarks
The unusual arrangement of the teeth within the jaw plates, as well as the composition of individual teeth, facilitates separating wrasse specimens from those of other, similar-looking taxa (see below). Fossil occurrences of Labridae are sparse, but Cicimurri et al. (2022) reported specimens from the Rupelian Ashley Formation of South Carolina, and Cicimurri & Knight (2009) mentioned their occurrence in the Chattian Chandler Bridge Formation. Labrid molecular divergence times were estimated by Cowman et al. (2009), who postulated that the extant lineages within this family largely diverged within the Miocene. This suggests that the labrid elements in our Catahoula Formation sample represent an unrecognized stem-member of the lineage.
description: Published as part of Cicimurri, David J., Ebersole, Jun A., Stringer, Gary L., Starnes, James E. & Phillips, George E., 2025, Late Oligocene fishes (Chondrichthyes and Osteichthyes) from the Catahoula Formation in Wayne County, Mississippi, USA, pp. 1-131 in European Journal of Taxonomy 984 (1) on pages 86-87, DOI: 10.5852/ejt.2025.984.2851, http://zenodo.org/record/15126034
title: New frontiers in strain-tuning : apparatus development, and tuning of the nemacity of FeSe across a wide strain range
Creators: name: Bartlett, Jack Michael
Publisher: name: University of St Andrews
Year: 2019

description: Over the last decade, an ‘iron age’ of superconductivity has challenged the paradigm of unconventional pairing established by copper-oxide-based materials. Fascinatingly, in these iron-based compounds superconductivity emerges from a state in which electrons choose to distinguish between two equivalent directions of the underlying crystalline axes. The origin of this ‘nematic’ state is highly debated. This thesis concentrates on FeSe, a material appealing because its nematicity does not occur in proximity to long-range magnetic order. Although uniaxial strain couples to nematic order, experiments to date have focused on applying only a small symmetry-breaking strain. The mechanical properties of FeSe make utilising established piezoelectric-based apparatus, designed for continuous tuning of large uniaxial strains, challenging. In this thesis we develop a platform to which samples can be adhered, and apply large anisotropic strain to FeSe. When of the same symmetry as the nematicity, and larger than the structural distortion, this applied strain fully constrains the lattice. We provide a precise set of resistivity measurements across a wide temperature and strain range, revealing vital new phenomenologies. We establish the relationship between electrical transport and nematicity across a large strain range at the structural transition and, by isolating the influence of domain walls, characterise the elastoresistivity for temperatures below this transition. By tracking the onset of domain formation, we determine the temperature dependence of the spontaneous structural distortion, and use this to extract the intrinsic resistivity anisotropy within a single nematic domain. Interestingly, we discover a crossover at ~ 50 K between distinct high- and low-temperature behaviours. This thesis is also concerned with the development of apparatus for tuning strain. We conceptualise a new type of stress-controlled cell, which can apply large (up to 8 GPa in compression) uniaxial stresses to microstructured samples – pushing them to their ultimate mechanical limit.
On a Classification of Irreducible Almost Commutative Geometries, A Second Helping
Creators: name: Jureit, Jan-H.
name: Stephan, Christoph A.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We complete the classification of almost commutative geometries from a particle physics point of view given in hep-th/0312276. Four missing Krajewski diagrams will be presented after a short introduction into irreducible, non-degenerate spectral triples.
description: 11 pages
Measurement of the transverse spatial quantum state of light at the single-photon level
Creators: name: Smith, Brian J.
name: Killett, Bryan
name: Raymer, M. G.
name: Walmsley, I. A.
name: Banaszek, K.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We present an experimental method to measure the transverse spatial quantum state of an optical field in coordinate space at the single-photon level. The continuous-variable measurements are made with a photon-counting, parity-inverting Sagnac interferometer based on all-reflecting optics. The technique provides a large numerical aperture without distorting the shape of the wave front, does not introduce astigmatism, and allows for characterization of fully or partially coherent optical fields at the single-photon level. Measurements of the transverse spatial Wigner functions for highly attenuated coherent beams are presented and compared to theoretical predictions.
description: 3 pages, 2 figures
Helium line emissivities in the solar corona
Creators: name: Del Zanna, G.
name: Storey, P. J.
name: Badnell, N. R.
name: Andretta, V.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present new collisional-radiative models (CRMs) for helium in the quiescent solar corona, and predict the emissivities of the He and He$^+$ lines to be observed by DKIST, Solar Orbiter, and Proba-3. We discuss in detail the rates we selected for these models, highlighting several shortcomings we have found in previous work. As no previous complete and self-consistent coronal CRM for helium existed, we have benchmarked our largest model at a density of 10$^{6}$ cm$^{-3}$ and temperature of 20,000 K against recent CRMs developed for photoionised nebulae. We then present results for the outer solar corona, using new dielectronic recombination rates we have calculated, which increase the abundance of neutral helium by about a factor of two. We also find that all the optical triplet He I lines, and in particular the well known He I 10830 and 5876 A lines are strongly affected by both photo-excitation and photo-ionisation from the disk radiation, and that extensive CRM models are required to obtain correct estimates. Close to the Sun, at an electron density of 10$^{8}$ cm$^{-3}$ and temperature of 1 MK, we predict the emissivity of the He I 10830 A to be comparable to that of the strong Fe XIII coronal line at 10798 A. However, we expect the He I emissivity to sharply fall in the outer corona, with respect to Fe XIII. We confirm that the He$^+$ Lyman $α$ at 304 A is also significantly affected by photo-excitation and is expected to be detectable as a strong coronal line up to several solar radii.
description: Accepted for publication in ApJ
An "Analytic" Version of Menshov's Representation Theorem
Creators: name: Kozma, Gady
name: Olevskii, Alexander
Publisher: name: arXiv
Year: 2005
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: Complex Variables (math.CV)
subject: FOS: Mathematics

description: Every measurable function f on the circle can be represented as a sum of harmonics with positive spectrum, converging in measure. For convergence almost everywhere this is not true. We discuss several other subsets of Z for which one might get a Menshov type representation converging almost everywhere or in measure.
description: 4 pages. Announcement of math.CA/0510616. Should be identical to journal version except for the French abstract
Is Contract Farming More Profitable and Efficient Than Non-Contract Farming-A Survey Study of Rice Farms In Taiwan
Creators: name: Chang, Ching-Cheng
name: Chen, Chi-Chung
name: Chin, Min-Ching
name: Tseng, Wei-Chun
name: Chang, Ching-Cheng
name: Chen, Chi-Chung
name: Chin, Min-Ching
name: Tseng, Wei-Chun
Publisher: name: Unknown
Year: 2006
Subjects: Land Economics/Use

description: Trade liberalization and globalization has modernized the food retail sector in Taiwan, affecting consumers, producers and trade patterns. These changes have placed significant pressures on farmers and processors including more stringent quality control and product varieties. The government has launched a rice production-marketing contract program in 2005 to assist rice farmers and the agro-business sector to work together as partners. The minimum scale for each contract is 50 hectares of adjacent rice paddies with 50 participants including rice farmers, seedling providers, millers and marketing agents. In order to evaluate the outcome of this program, a survey is conducted in the summer of 2005 after the first (spring) crop is harvested. Information of price and value of output and major variable and fixed inputs are collected along with characteristics of the farmers and farms. The survey results show that the average revenue of a contract farm is about 11 percent higher than an average non-contract farm. The per hectare cost of production in a contract farm is about 13 percent lower and as a result the average profit margin under contract is more than 50 percent above those without contract. A swtiching regression profit frontier model is adopted to further investigate their efficiency performance. The result indicates that an average contract farms is 20 percent more efficient than an average non-contract farm in a comparable operating environment. The result also suggests that although contract farming has potential to improve the profit of smallholders, it is not a sufficient condition for such improvement.
Scattering mechanisms and spectral properties of the one-dimensional Hubbard model
Creators: name: Carmelo, J. M. P.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: It is found that the finite-energy spectral properties of the one-dimensional Hubbard model are controlled by the scattering of charged $η$-spin-zero $2ν$-holon composite objects, spin-zero $2ν$-spinon composite objects, and charged $η$-spin-less and spin-less objects, rather than by the scattering of independent $η$-spin 1/2 holons and spin 1/2 spinons. Here $ν=1,2,...$. The corresponding $S$ matrix is calculated and its relation to the spectral properties is clarified.
description: 8 pages, no figures
County-Level Determinants of Local Public Services in Appalachia: A Multivariate Spatial Autoregressive Model Approach
Creators: name: Gebremariam, Gebremeskel H.
name: Gebremedhin, Tesfa G.
name: Gebremariam, Gebremeskel H.
name: Gebremedhin, Tesfa G.
Publisher: name: Unknown
Year: 2006
Subjects: Public Economics

description: In this paper, multivariate spatial autoregressive model of local public expenditure determination is developed. The empirical model is developed based on maximization of community utility function. The model is estimate by efficient GMM using Appalachian counties and the results indicate significant spatial spillover effects with respect to local public expenditures.
Determining the Probability of Default of Agricultural Loans in a French Bank
Creators: name: Jouault, Amelie
name: Featherstone, Allen M.
name: Jouault, Amelie
name: Featherstone, Allen M.
Publisher: name: Unknown
Year: 2006
Subjects: Agricultural Finance

description: Recently, financial institutions have developed improved internal risk rating systems and emphasized the probability of default and loss given default. Also they have been affected by globalization and it became important to understand the way foreign banks operate. The probability of default is studied for 756 loans from a French bank: CIC- Banque SNVB. A binomial logit regression is used to estimate a model of the probability of default of an agribusiness loan. The results show that leverage, profitability and liquidity at loan origination are good indicators of the probability of default. The loan length is another good indicator of the probability of default. Also it is more accurate to develop a model for each type of collateral (activity).
Dilute Nitride GaInNAsSb for Next Generation Optical Communications
Creators: name: Collins, Xiao
Publisher: name: Lancaster University
Year: 2021

description: Current technology for the light detection in telecommunication revolves around InGaAs based on InP substrates. However, there is interest in switching to GaAs substrates to take advantage of the cheaper and larger substrates as well as the lattice-matched AlxGa1−xAs material system. Therefore, this thesis reports on the use of the dilute nitride alloy GaInNAsSb lattice matched to GaAs that can detect at wavelengths important to telecommunications such as 1.55µm. Molecular beam epitaxy (MBE) was used to grow GaInNAsSb p-i-n and n-i-p photodetectors on GaAs substrates with the lowest band gap reaching 0.64eV, far below the necessary band gap required for detection at 1.55µm (0.8eV) and that for InGaAs (0.74eV). However, due to the high defect concentration typically found in dilute nitride alloys, a post-growth thermal anneal was applied to the samples which has the effect of blueshifting the band gap by approximately 40meV. The effect of a post-growth anneal on the band gap, dark current, unintentional doping concentration and quantum efficiency is investigated in order to find the most optimal temperature. This temperature is found to be related to an intrinsic dopant type switch in the GaInNAsSb as one of the samples with the lowest dark current density (2.2mAcm −2 at −5V) is one that is annealed at 735◦C, just before a switch in intrinsic type from n-type to p-type. This is further investigated with a much narrower annealing range centred around 735◦C. While this narrow annealing range did not result in a consistent type switch temperature for all samples, admittance spectroscopy indicated a large increase in a p-type defect concentration demonstrating the potential for the anneal to worsen the performance of the photodiode at sufficiently high temperatures. Furthermore, it was found that annealing at temperatures close to 730◦C results in a much better photodetector than as-grown devices, which can be quantified by comparing the quantum efficiency at 1.55µm where the annealed sample reaches 38% as compared to the 3% in the as-grown device.The 3dB bandwidth was measured on the most optimally annealed photodetectors. In this measurement, the highest bandwidth reached is 9.2GHz at −18V which is limited by the resistance of the photodetector and can be further improved using Ohmic contacts with a lower resistance. Finally, a discussion on the integration of GaInNAsSb with AlGaAs in a separate absorption and multiplication avalanche photodiode (SAM APD) is held. Impact ionisation in GaInNAsSb and its effect on noise is discussed, as well as the design of a SAM APD with a very thin AlGaAs multiplication layer of 50nm. In this study, such SAM APDs are grown with a GaAs absorber instead of GaInNAsSb to allow for any corrections required in the important charge sheet layer, however in future studies GaInNAsSb can be used instead of GaAs as an absorber.
Market Penetration of Biomass Fuels for Electricity Generation
Creators: name: Maung, Thein A.
name: Maung, Thein A.
Publisher: name: Unknown
Year: 2006
Subjects: Resource /Energy Economics and Policy

description: The electric power sector is a main source of carbon dioxide (CO2) emissions that contribute to global warming. In the U.S., fossil fuel fired power plants are responsible for about 38% of the total CO2 emissions from all sources. Switching a significant portion of the U.S. electricity generating capacity from fossil fuels to biomass fuels would help reduce CO2 emissions from the electric power industries. At present, biomass accounts for only about 1% of the fuel used for electricity generation in the U.S. In contrast, coal alone accounts for about 50%, and nuclear, natural gas and petroleum explain for about 20%, 16% and 3% respectively of the fuels used for electricity generation. There are a number of factors that may influence the extent to which biomass fuels are to penetrate the electricity market: facility needs, growth in electricity demand, prices of fossil fuels and advances in technology. Electricity is generally produced in large, expensive and long-lived facilities. However new facilities or capitals are often built to meet demand growth. Capitals can be generally said to have a given productive lifetime. As new capital investment occurs and older capital is retired, electricity producers will have opportunities to substitute away from fossil fuels. Thus, an increase in the market penetration of biomass power will likely occur when existing fossil power plants are retired and replaced by new and less carbon intensive power plants. The market penetration of biomass electricity will also depend on a strong growth in electricity demand due to economic and population growth, availability and prices of fuels, environmental considerations and technological advances. Specifically, this paper will look at the potential for biomass penetration into the electricity market considering: a) prices of fossil fuels such as coal, natural gas and petroleum for power production, b) the capital turnover rate for existing stock of fossil power plants, c) changes in technologies which could facilitate the use of biomass as fuels for electricity generation.
Weather derivatives as an instrument to hedge against the risk of high energy cost in greenhouse production
Creators: name: Berg, Ernst
name: Schmitz, Bernhard
name: Starp, Michael
name: Berg, Ernst
name: Schmitz, Bernhard
name: Starp, Michael
Publisher: name: Unknown
Year: 2006
Subjects: Risk and Uncertainty

description: In many areas agriculture is exposed to weather-related risks. Weather derivatives that get more and more in the focus of interest can reduce these risks. In this study we develop a temperature based weather derivative and analyse how it can reduce the weather-related energy cost risk in greenhouse production. We base this study on a temperature index whose stochastic characteristics are analysed. Finally we simulate the heating energy demand of a horticultural firm.
LAND TENURE AND SOCIOECONOMIC INTERACTIONS
Creators: name: Ssemambo, James
name: Bukenya, James O.
name: Mojica, Maribel N.
name: Ssemambo, James
name: Bukenya, James O.
name: Mojica, Maribel N.
Publisher: name: Unknown
Year: 2006
Subjects: Land Economics/Use

description: The study analyzed the determinants of land tenure insecurity in Uganda using survey data collected by the International Food Policy Research Institute (IFPRI) during the Policies for Improved Land Management Project in Uganda, 1999-2001. The survey included a sample of 1322 farm households randomly selected and interviewed using a formal questionnaire. The analysis revealed that tenure category, number of households in the village involved in disputes outside the village, and the number of households in the village who lost land as a result of a dispute over land were significant factors affecting tenure insecurity.
Bausi, Alessandro (Hrsg.): La vita e i miracoli di Libānos
Creators: name: Kropp, Manfred
Publisher: name: Oriens christianus : Hefte für die Kunde des christlichen Orients
Year: 2024

description: Oriens christianus : Hefte für die Kunde des christlichen Orients, Bd. 97 (2013): Oriens christianus, Band 97