cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Fordonia leucobalia
Creators: name: Leviton, Alan E.
name: Siler, Cameron D.
name: Weinell, Jeffrey L.
name: Brown, Rafe M.
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Repitilia
Squamata
Homalopsidae
Fordonia
Fordonia leucobalia

description: Fordonia leucobalia (Schlegel, 1837)
White-bellied [crab-eating] Water Snake
Homalopsis leucobalia Schlegel, 1837b:345, pl. 13, figs. 8–9.— Taylor, 1922a:115.
Fordonia leucobalia, Gray, 1842:75.— Murphy and Voris, 2014:20.— Wallach, Williams, and Boundy, 2014:293.
TYPE LOCALITY AND TYPE SPECIMEN (S).— Timor, Indonesia. Lectotype: RMNH 1161 (designated by Iskandar and Colijn [2001:92]).
PHILIPPINE DISTRIBUTION.— Mindanao (fide Wallach et al. [2014:293]).
GENERAL DISTRIBUTION (OTHER THAN PHILIPPINES).— India (Bengal), Myanmar, Vietnam, Nicobar Ids., Malaysia, Singapore, Indonesia (Java, Sumatra, Timor) to northern Australia.
REMARKS.— Wallach et al. (2014:293) include Luzon in their distribution statement but we know of no confirmed record for its occurrence there.
CONSERVATION STATUS [IUCN].— Least Concern [2016] ver. 3.1.
description: Published as part of Leviton, Alan E., Siler, Cameron D., Weinell, Jeffrey L. & Brown, Rafe M., 2018, Synopsis of the Snakes of the Philippines A Synthesis of Data from Biodiversity Repositories, Field Studies, and the Literature, pp. 399-568 in Proceedings of the California Academy of Sciences (Oxford, England) (Oxford, England) 64 (14) on page 416, DOI: 10.5281/zenodo.11512589
Regge trajectories in light and heavy mesons: the pattern of appearances and possible dynamical explanations
Creators: name: Afonin, S. S.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: I briefly review the Regge approach to the hadron spectrum and advocate a dynamical emergence of principal quantum number in the known spectrum of light non-strange mesons. Further it is shown how the linear radial trajectories with universal slope can be extended to heavy quarkonia and a qualitative string interpretation is given. After that I discuss a recently proposed non-string model leading to a natural appearance of linear Regge trajectories and explaining many mass relations.
description: 6 pages, contribution to HADRON 2019. arXiv admin note: text overlap with arXiv:1606.05218
Metallicity of the globular cluster NGC 6388 from high resolution spectra of more than 160 giant stars
Creators: name: Carretta, Eugenio
name: Bragaglia, Angela
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: NGC 6388 is one of the most massive Galactic globular clusters (GC) and it is an old, metal-rich, Galactic bulge cluster. By exploiting previous spectroscopic observations we were able to bypass the uncertainties in membership related to the strong field stars contamination. We present the abundance analysis of 12 new giant stars with UVES spectra and 150 giants with GIRAFFE spectra acquired at the ESO-VLT. We derived radial velocities, atmospheric parameters and iron abundances for all stars. When combined to previous data, we obtain a grand total of 185 stars homogeneously analysed in NGC 6388 from high-resolution spectroscopy. The average radial velocity of the 185 stars is 81.2+/-0.7, rms = 9.4 km/s. We obtain an average metallicity [Fe/H]=-0.480 dex, rms = 0.045 dex (35 stars) and [Fe/H]=-0.488 dex, rms = 0.040 dex (150 stars) from the UVES and GIRAFFE samples, respectively. Comparing these values to internal errors in abundance, we exclude the presence of a significant intrinsic metallicity spread within the cluster. Since about a third of giants in NGC 6388 is claimed to belong to the "anomalous red giants" in the HST pseudo-colour map defining the so-called type-II GCs, we conclude that either enhanced metallicity is not a necessary requisite to explain this classification (as also suggested by the null iron spread for NGC 362) or NGC 6388 is not a type-II globular cluster.
description: 17 pages, 16 figures, 8 tables; accepted for publication on Astronomy and Astrophysics
The rainbow modified-ladder approximation and degenerate pion
Creators: name: Chang, Lei
name: Ding, Minghui
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Correlation functions can be described by the corresponding equations, $viz.$, gap equation for quark propagator and the inhomogeneous Bethe-Salpeter equation for vector dressed-fermion-Abelian-gauge-boson vertex in which specific truncations have to be implemented. The general vector and axial-vector Ward-Green-Takahashi identities require these correlation functions to be interconnected, in consequence of this, truncations made must be controlled consistently. It turns out that if the rainbow approximation is assumed in gap equation, the scattering kernel in Bethe-Salpeter equation can adopt the ladder approximation, which is one of the most basic attempts to truncate the scattering kernel. Additionally, a modified-ladder approximation is also found to be a possible symmetry-preserving truncation scheme. As an illustration of this approximation for application a treatment of pion is included. Pion mass and decay constant are found to be degenerate in ladder and modified-ladder approximations, even though the Bethe-Salpeter amplitude are with apparent distinction. The justification for the modified-ladder approximation is examined with the help of the Gell-Mann-Oakes-Renner (GMOR) relation.
description: 9 pages, 4 figures
The \bar\partial_b-complex on decoupled boundaries in C^n
Creators: name: Nagel, Alexander
name: Stein, Elias
Publisher: name: arXiv
Year: 2007
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics

description: The purpose of this paper is to prove optimal estimates for solutions of the Kohn-Laplacian for certain classes of model domains in several complex variables. This will be achieved by applying a type of singular integral operator whose novel features (related to product theory and flag kernels) differ essentially from the more standard Calderon-Zygmund operators that have been used in these problems hitherto.
description: 65 pages, published version
mRNA bisulfite-sequening of human developmental samples
Creators: name: 刘健恒
Publisher: name: CNGB
Year: 2022
Subjects: Raw sequence reads
Transcriptome or Gene expression
Other
Bisulfite
Multiisolate
RNA modification

description: We applied mRNA BS-seq on human developmental samples, such as human GV and MII oocytes. This dataset also includes hESC samples related to embryo development.
Testing Accretion Disk Theory in Black Hole X-ray Binaries
Creators: name: Davis, Shane W.
name: Done, Chris
name: Blaes, Omer M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present results from spectral modeling of three black hole X-ray binaries: LMC X-3, GRO J1655-40, and XTE J1550-564. Using a sample of disk dominated observations, we fit the data with a range of spectral models that includes a simple multitemperature blackbody (DISKBB), a relativistic accretion disk model based on color-corrected blackbodies (KERRBB), and a relativistic model based on non-LTE atmosphere models within an alpha prescription (BHSPEC). BHSPEC provides the best fit for a BeppoSAX observation of LMC X-3, which has the broadest energy coverage of our sample. It also provides the best fit for multiple epochs of Rossi X-ray Timing Explorer (RXTE) data in this source, except at the very highest luminosity (L/L_{Edd} >~ 0.7), where additional physics must be coming into play. BHSPEC is also the best-fit model for multi-epoch RXTE observations of GRO J1655-40 and XTE J1550-564, although the best-fit inclination of the inner disk differs from the binary inclination. All our fits prefer alpha=0.01 to alpha=0.1, in apparent disagreement with the large stresses inferred from the rapid rise times observed in outbursts of these two sources. In all three sources our fits imply moderate black hole spins (a/M ~ 0.1 - 0.8), but this is sensitive to the reliability of independent measurements of these system parameters and to the physical assumptions which underly our spectral models.
description: 15 pages, emulateapj, ApJ, in press
Channeling 5-min photospheric oscillations into the solar outer atmosphere through small-scale vertical magnetic flux tubes
Creators: name: Khomenko, E.
name: Centeno, R.
name: Collados, M.
name: Bueno, J. Trujillo
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report two-dimensional MHD simulations which demonstrate that photospheric 5-min oscillations can leak into the chromosphere inside small-scale vertical magnetic flux tubes. The results of our numerical experiments are compatible with those inferred from simultaneous spectropolarimetric observations of the photosphere and chromosphere obtained with the Tenerife Infrared Polarimeter (TIP) at 10830 A. We conclude that the efficiency of energy exchange by radiation in the solar photosphere can lead to a significant reduction of the cut-off frequency and may allow for the propagation of the 5 minutes waves vertically into the chromosphere.
description: accepted by ApJL
Outflows, envelopes, and disks as evolutionary indicators in Lupus YSOs
Creators: name: Vazzano, M. M.
name: Fernández-López, M.
name: Plunkett, A.
name: de Gregorio-Monsalvo, I.
name: Santamaría-Miranda, A.
name: Takahashi, S.
name: Lopez, C.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: By studying 7 objects in the Lupus clouds we aim to test if a coherence exists between commonly used evolutionary tracers. We present ALMA observations of the continuum and molecular line emission that probe the dense gas and dust of cores and their associated molecular outflows. Our source selection in a common environment allows for a consistent comparison across different evolutionary stages. The quality of the ALMA molecular data allows us to reveal the nature of the molecular outflows by studying their morphology and kinematics. The images in IRAS15398-3359 appear to show that it drives a precessing episodic jet-driven outflow with at least 4 ejections separated by periods of time between 50 and 80 years, while data in IRAS16059-3857 show similarities with a wide-angle wind model also showing signs of being episodic. The outflow of J160115-41523 could be better explain with the wide-angle wind model as well, but new observations are needed to explore its nature. We find that the most common evolutionary tracers are useful for broad evolutionary classifications, but are not consistent with each other to provide enough granularity to disentangle different evolutionary stage of sources that belong to the same Class. Outflow properties used as protostellar age tracers (mass, momentum, energy, opening angle) may suffer from differences in the nature of each outflow, thus detailed observations are needed to refine evolutionary classifications. We found both AzTEC-lup1-2 and AzTEC-lup3-5 to be in the pre-stellar stage, although the latter could be more evolved. IRAS15398-3359, IRAS16059-3857 and J160115-41523, which have clearly detected outflows, are Class 0 sources, although we are not able to determine which is younger and which is older. Sz102 and Merin28 are the most evolved sources and show signs of having associated flows, not as well traced by CO as for the younger sources.
Assessment of Cr isotopic heterogeneities of volatile-rich asteroids based on multiple planet formation models
Creators: name: Fukai, Ryota
name: Arakawa, Sota
Publisher: name: arXiv
Year: 2020
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Describing the comprehensive evolutionary scenario for asteroids is key to explaining the various physical processes of the solar system. Bulk-scale carbonaceous chondrites (CCs) possibly record the primordial information associated with the formation processes of their parent bodies. In this study, we tried to estimate the relative formation region of volatile-rich asteroids by utilizing the nucleosynthetic Cr isotopic variation (54Cr/52Cr) in bulk-scale CCs. Numerical calculations were conducted to track the temporal evolution of isotopically different (solar and presolar) dust and 54Cr/52Cr values for mixed materials with disk radius. First, we found that isotopic heterogeneities in CC formation regions would be preserved with a weak turbulence setting that would increase the timescales of the advection and diffusion in the disk. Second, we assessed the effects of gaps formed by giant planets. Finally, the distance from the injected supernovae and Cr isotopic compositions of the presolar grains were investigated in terms of the estimated formation region of CCs. In our results, a plausible formation region of four types of CCs can be obtained with the supernova from approximately 2 pc and typical Cr isotopic compositions of presolar grains. Among the parent bodies of CCs (i.e., volatile-rich asteroids), B-type asteroids formed in the outermost region, which is inconsistent with the present population, showing that D-type asteroids are generally located beyond most of the C-complex asteroids. Both the initial and present orbits of asteroids might be explained by the scatter attributed to the inward-outward migration of Jupiter and Saturn.
description: 43 pages, 15 figures, and 1 table, accepted for publication in The Astrophysical Journal
Covariant four dimensional differential calculus in $κ$-Minkowski
Creators: name: Rosati, Giacomo
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: It is generally believed that it is not possible to have a four dimensional differential calculus in $κ$-Minkowski spacetime, with $κ$-Poincaré relativistic symmetries, covariant under ($κ$-deformed) Lorentz transformations. Thus, one usually introduces a fifth differential form, whose physical interpretation is still challenging, and defines a covariant five dimensional calculus. Nevertheless, the four dimensional calculus is at the basis of several works based on $κ$-Minkowski/$κ$-Poincaré framework that led to meaningful insights on its physical interpretation and phenomenological implications. We here revisit the argument against the covariance of the four dimensional calculus, and find that it depends crucially on an incomplete characterization of Lorentz transformations in this framework. In particular, we understand that this is due to a feature, still uncovered at the time, that turns out to be fundamental for the consistency of the relativistic framework: the noncommutativity of the Lorentz transformation parameters. Once this is taken into account, the four dimensional calculus is found to be fully Lorentz covariant. The result we obtain extends naturally to the whole $κ$-Poincaré algebra of transformations, showing the close relation between its relativistic nature and the properties of the differential calculus.
description: some misprints were corrected, and some references were added
The history of LHCb
Creators: name: Belyaev, I.
name: Carboni, G.
name: Harnew, N.
name: Teubert, C. Matteuzzi. F.
Publisher: name: arXiv
Year: 2021
Subjects: subject: History and Philosophy of Physics (physics.hist-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: In this paper we describe the history of the LHCb experiment over the last three decades, and its remarkable successes and achievements. LHCb was conceived primarily as a b-physics experiment, dedicated to CP violation studies and measurements of very rare b decays, however the tremendous potential for c-physics was also clear. At first data taking, the versatility of the experiment as a general-purpose detector in the forward region also became evident, with measurements achievable such as electroweak physics, jets and new particle searches in open states. These were facilitated by the excellent capability of the detector to identify muons and to reconstruct decay vertices close to the primary pp interaction region. By the end of the LHC Run 2 in 2018, before the accelerator paused for its second long shut down, LHCb had measured the CKM quark mixing matrix elements and CP violation parameters to world-leading precision in the heavy-quark systems. The experiment had also measured many rare decays of b and c quark mesons and baryons to below their Standard Model expectations, some down to branching ratios of order 10-9. In addition, world knowledge of b and c spectroscopy had improved significantly through discoveries of many new resonances already anticipated in the quark model, and also adding new exotic four and five quark states.
Multiplicative bijections between algebras of differentiable functions
Creators: name: Mrcun, J.
name: Semrl, P.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 58A05; 46E25

description: We show that any multiplicative bijection between the algebras of differentiable functions, defined on differentiable manifolds of positive dimension, is an algebra isomorphism, given by composition with a unique diffeomorphism.
Transculturing and/or Pluricultural Competence?
Creators: name: Narcy-Combes, Jean-Paul
name: Narcy-Combes, Marie-Françoise
Publisher: name: Humboldt-Universität zu Berlin
Year: 2024
Subjects: subject: transculturing
subject: pluricultural competence
subject: transdisciplinarity
subject: cognition
subject: action
subject: interaction
subject: comportements transculturels
subject: compétence pluriculturelle
subject: transdisciplinarité
subject: 400 Sprache
subject: 370 Bildung und Erziehung
subject: 402 Verschiedenes

description: This contribution aims to lead the reader to an answer to the question in the title. It must be seen as a meta-reflection on the results of a series of courses set up as action (intervention) research. These courses primarily revealed that it was important to understand the internal processes that take place before discourse is produced and trigger its production in situations where the interactants come from different cultural backgrounds. The courses will be briefly described, followed by a transdisciplinary theoretical development. A final course taking on board the results of our theoretical and field work will then be analyzed. The need for some form of introspection to understand what is described as transcultural behavior will justify the answer to the question in the title.
description: Cette contribution a pour objectif d’amener le lecteur à comprendre la réponse apportée à la question du titre. Elle doit être perçue comme une métaréflexion sur les résultats de plusieurs formations organisées sous forme de recherches-interventions. Ces formations ont révélé qu’il était important de comprendre comment fonctionnent les processus internes qui précèdent la production de discours et qui déclenchent celle-ci. Une brève analyse de ces formations suivra, complétée par un développe¬ment théorique transdisciplinaire. Une dernière formation prenant en compte l’ensemble des résultats de notre travail théorique et pratique sera ensuite abordée. Le besoin d’une forme d’introspection pour comprendre ce que l’on pourrait appeler un comportement transculturel justifiera la réponse que nous donnons à la question du titre.
An analytical solution for the correct determination of crack lengths via cantilever stiffness
Creators: name: Alfreider, Markus
name: Kolitsch, Stefan
name: Wurster, Stefan
name: Kiener, Daniel
Publisher: name: arXiv
Year: 2020
Subjects: subject: Applied Physics (physics.app-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The present work provides an analytic solution for the stiffness to crack length relation in microscopic cantilever shaped fracture specimens based on classical beam theory and substitution of the crack by a virtual rotational spring element. The resulting compact relationship allows for accounting of the actual beamgeometry and agrees very well with accompanying finite element simulations. Compared with the only other model present in literature the proposed relationship reduces the deviation between model and data to a maximum of 1.6% fromthe previous minimumof 15%. Thus, the novel solution will help to reduce the necessity for individual simulations and aim to increase the comparability of elastic-plastic microcantilever fracture experiments in the future.
Relativistic action-at-a-distance interactions: Lagrangian and Hamiltonian to terms of second order
Creators: name: Louis-Martinez, Domingo J.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Relativistic systems of particles interacting pairwise at a distance (interactions not mediated by fields) in flat spacetime are studied. It is assumed that the interactions propagate at the speed of light in vacuum and that all masses are scalars under Poincaré transformations. The action functional of the theory depends on multiple times (the proper times of the particles). In the static limit, the theory has three components: a linearly rising potential, a Coulomb-like interaction and a dynamical component to the Poincaré invariant mass. In this Letter we obtain explicitly, to terms of second order, the Lagrangian and the Hamiltonian with all the dynamical variables depending on a single time. Approximate solutions of the relativistic two-body problem are presented.
$Ξ^{0}(1530)$ Production in Heavy-Ion Collisions \linebreak and its Implications for $Δt_{therm-chem}$
Creators: name: Witt, R.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: We present the first measurements of the transverse momentum spectra and mid-rapidity yields of the $Ξ^{0}(1530)$ multi-strange baryon resonance, from $\sqrt{\mathrm{s_{NN}}}=200$ GeV Au+Au collisions at RHIC from the STAR experiment. Ratios of the mid-rapidity yield of this long-lived ($cτ=21$ fm) resonance to its non-resonance partner (the $Ξ$ baryon) are compared to predictions from thermal models and to the corresponding ratios for other resonances previously reported by STAR. Conclusions will be drawn about the implication of these measurements for the time between chemical and thermal freeze-out ($Δt_{therm-chem}$) and any observed deviations from the expected mass and width will be discussed.
description: 5 pages, 3 figures, proceedings of the 19th International Conference on Ultra-Relativistic Nucleus-Nucleus Collisions (QM2006)
A photometric and spectroscopic survey of AGB stars in M31
Creators: name: Brewer, James Philip
Publisher: name: University of British Columbia
Year: 2009

description: Asymptotic giant-branch (AGB) stars are identified and classified in five 7'x7' fields spaced along M31's SW semi-major axis using a four band photometric system. An investigation of the AGB luminosity functions and red giant-branch widths reveals significant differences between the star forming histories of the five fields. The distance modulus of M31 is derived using carbon stars (C-stars) and found to be consistent with both a value obtained from Cepheids and with values in the literature. The ratio of AGB C- to M-stars (C/M ratio) in the five fields is found to increase with galactocentric distance and it is shown that photometric incompleteness is not responsible for this effect. This is the first clear demonstration of a varying C/M ratio in an external galaxy. The C/M ratios appear to be insensitive to star-forming history differences but sensitive to metallicity differences between the fields. Previous observations are used to define a relationship between the C/M ratio and metallicity, and this is used to obtain estimates of the field metallicities. These estimates are found to be consistent with a previous measurement of M31's metallicity gradient. The C /M ratios measured in M31 indicate that the composition of M31's interstellar medium may be position dependent, and evidence is cited in favour of this. Follow up spectroscopy was obtained in two of the five fields, and is used to show that the photometric system did an excellent job of discriminating between M-, S- and C-stars. Of the 48 C-stars for which spectra were obtained, 7 have strongly enhanced ¹³C bands (J-stars), 2 have strong H⍺ emission, while 3 are found to exhibit enhanced Li absorption (Li-stars). Both the J- and Li-stars are fainter than predicted by current theoretical models, while the colours of the H⍺ stars suggest they may be in the terminal phases of their evolution. The C₂ and CN bandstrengths of the C-stars are measured, and no correlation between these bandstrengths and either M[sub bol] or (V — I) is found. It is suggested that this lack of correlation is due to an age spread. The spectra of the first confirmed S-star in M31 is presented, and two evolutionary pathways are suggested to account for this star's high luminosity.
Infrared Dark Clouds: precursors to star clusters
Creators: name: Rathborne, J. M.
name: Jackson, J. M.
name: Simon, R.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Infrared Dark Clouds (IRDCs) are dense molecular clouds seen as extinction features against the bright mid-infrared Galactic background. Millimeter continuum maps toward 38 IRDCs reveal extended cold dust emission to be associated with each of the IRDCs. IRDCs range in morphology from filamentary to compact and have masses of 120 to 16,000 Msun, with a median mass of ~940 Msun. Each IRDC contains at least one compact (<=0.5 pc) dust core and most show multiple cores. We find 140 cold millimeter cores unassociated with MSX 8um emission. The core masses range from 10 to 2,100 Msun, with a median mass of ~120 Msun. The slope of the IRDC core mass spectrum (alpha ~ 2.1 +/- 0.4) is similar to that of the stellar IMF. Assuming that each core will form a single star, the majority of the cores will form OB stars. IRDC cores have similar sizes, masses, and densities as hot cores associated with individual, young high-mass stars, but they are much colder. We therefore suggest that IRDC represent an earlier evolutionary phase in high-mass star formation. In addition, because IRDCs contain many compact cores, and have the same sizes and masses as molecular clumps associated with young clusters, we suggest that IRDCs are the cold precursors to star clusters. Indeed, an estimate of the star formation rate within molecular clumps with similar properties to IRDCs (~2 Msun/yr) is comparable to the global star formation rate in the Galaxy, supporting the idea that all stars may form in such clumps.
description: Accepted for publication in ApJ. 19 pages. 10 figures
Comment: Classifier Technology and the Illusion of Progress
Creators: name: Stine, Robert A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics

description: Comment on Classifier Technology and the Illusion of Progress [math.ST/0606441]
description: Published at http://dx.doi.org/10.1214/088342306000000042 in the Statistical Science (http://www.imstat.org/sts/) by the Institute of Mathematical Statistics (http://www.imstat.org)
The role of standing wave in the generation of hot electrons by femtosecond laser beams incident on dense ionized target
Creators: name: Babjak, Robert
name: Psikal, Jan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: We demonstrate the differences in hot electron absorption mechanisms dominant in the interaction of femtosecond laser pulse with intensities 1e18 W/cm2 and 1e21 W/cm2 on fully ionized target with steep density profile and preplasma with moderate scale length (3 microns). We show that acceleration of each electron starts at the moment when magnetic component of standing electromagnetic wave changes its polarity in regime without preplasma. In the presence of preplasma the stochastic heating is the dominant absorption mechanism along with the longitudinal electric field. It is observed, that wave's energy is absorbed only if standing wave is already created at the position of electron during the interaction with the pulse with intensity 1e18 W/cm2. In the case with intensity 1e21 W/cm2, part of electrons is pre-accelerated in front of the target before the reflection and following stochastic heating. The presence of preplasma results in electron temperatures close to or even exceeding ponderomotive scaling. At higher intensity, the re-injection of electrons previously repelled by incident wave's ponderomotive force into high-field regions is allowed if standing wave is created.
description: 29 pages, 17 figures
Transition between vacuum and finite-density states in the infinite-dimensional Bose-Hubbard model with spatially inhomogeneous dissipation
Creators: name: Asai, Shiono
name: Goto, Shimpei
name: Danshita, Ippei
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We analyze dynamics of the infinite-dimensional Bose-Hubbard model with spatially inhomogeneous dissipation in the hardcore boson limit by solving the Lindblad master equation with use of the Gutzwiller variational method. We consider dissipation processes that correspond to inelastic light scattering in the case of Bose gases in optical lattices. We assume that the dissipation is applied to a half of lattice sites in a spatially alternating manner. We focus on steady states at which the system arrives after long-time evolution. We find that when the average particle density is varied, the steady state exhibits a transition between a state in which the sites without dissipation are vacuum and that containing a finite number of particles at those sites. We associate the transition with the tendency of the sites with dissipation towards a local state at infinite temperature.
description: 10 pages, 8 figures
Elicitation - switch-reference and relative clauses
Creators: name: Sampi Ríos, Celia
name: Clem, Emily
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2024
Subjects: subject: amc

description: This bundle contains recordings and associated notes from an elicitation session conducted by Emily Clem with Celia Sampi Ríos. Topics covered include switch-reference, attitude reports, binding, relative clauses, and negation.
On the classical confinement of test particles to a thin 3-brane in the absence of non-gravitational forces
Creators: name: La Camera, M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The classical confinement condition of test particles to a brane universe in the absence of non-gravitational forces is transformed using the Hamilton-Jacobi formalism. The transformed condition provides a direct criterion for selecting in a cosmological scenario 5D bulk manifolds wherein it is possible to obtain confinement of trajectories to 4D hypersurfaces purely due to classical gravitational effects.
description: 12 pages, version to appear in MPLA
Strangeness $S = -3$ and $-4$ baryon-baryon interactions in relativistic chiral effective field theory
Creators: name: Liu, Zhi-Wei
name: Song, Jing
name: Li, Kai-Wen
name: Geng, Li-Sheng
Publisher: name: arXiv
Year: 2020
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The strangeness $S=-3$ and $-4$ baryon-baryon interactions are investigated in the relativistic chiral effective field theory at leading order. First, the potentials are derived from the $S=-1$ sector assuming that the corresponding low-energy constants are related to each other via SU(3) flavor symmetry. The comparison with the state-of-the-art lattice QCD simulations, show, however, that SU(3) flavor symmetry breaking effects can not be neglected. In order to take into account these effects, we redetermine two sets of low-energy constants by fitting to the lattice QCD data in the $ΞΣ$ and $ΞΞ$ channels respectively. The fitting results demonstrate that the lattice QCD $S$-waves phase shifts for both channels can be described rather well. Without any additional free low-energy constants, the predicted phase shifts for the ${}^3D_1$ channel and the mixing angle $\varepsilon_1$ are also in qualitative agreement with the lattice QCD data for the $S=-3$ channel, while the results for the $S=-4$ channel remain to be checked by future lattice QCD simulations. With the so-obtained low-energy constants, the $S$-wave scattering lengths and effective ranges are calculated for these two channels at the physical point. Finally, in combination with the $S=0$ and $-2$ results obtained in our previous works, we study the evolution of the irreducible representation $27$ in the baryon-baryon interactions as a function of increasing strangeness. It is shown that the attraction decreases dramatically as strangeness increases from $S=0$ to $S=-2$, but then remains relatively stable until $S=-4$. The results indicate that the existence of bound states in the $ΞΣ$ and $ΞΞ$ channels is rather unlikely.
description: 9 pages, 4 figures
Modular Information Flow through Ownership
Creators: name: Crichton, Will
name: Patrignani, Marco
name: Agrawala, Maneesh
name: Hanrahan, Pat
Publisher: name: arXiv
Year: 2021
Subjects: subject: Programming Languages (cs.PL)
subject: FOS: Computer and information sciences

description: Statically analyzing information flow, or how data influences other data within a program, is a challenging task in imperative languages. Analyzing pointers and mutations requires access to a program's complete source. However, programs often use pre-compiled dependencies where only type signatures are available. We demonstrate that ownership types can be used to soundly and precisely analyze information flow through function calls given only their type signature. From this insight, we built Flowistry, a system for analyzing information flow in Rust, an ownership-based language. We prove the system's soundness as a form of noninterference using the Oxide formal model of Rust. Then we empirically evaluate the precision of Flowistry, showing that modular flows are identical to whole-program flows in 94% of cases drawn from large Rust codebases. We illustrate the applicability of Flowistry by using it to implement prototypes of a program slicer and an information flow control system.
description: Published at PLDI 2022
Scintillation reduction by use of multiple Gaussian laser beams with different wavelengths
Creators: name: Peleg, Avner
name: Moloney, Jerome V.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We study the scintillation index of N partially overlapping collimated lowest order Gaussian laser beams with different wavelengths in weak atmospheric turbulence. Using the Rytov approximation we calculate the initial beam separation that minimizes the longitudinal scintillation. Further reduction of the longitudinal scintillation is obtained by optimizing with respect to both beam separation and spot size. The longitudinal scintillation of the optimal N-beam configurations is inversely proportional to N, resulting in a 92% reduction for a 9-beam system compared with the single beam value. The radial scintillation values for the optimal N-beam configurations are significantly smaller than the corresponding single beam values.
description: 8 pages, 3 figures. Submitted to IEEE Photonics Technology Letters
THE STATE OF HEALTH JOURNALIST TRAINING AND EDUCATION: AN EXPLORATORY QUALITATIVE STUDY
Creators: name: Livengood, Jamie Marie
Publisher: name: Digital Repository at the University of Maryland
Year: 2015
Subjects: subject: Public health
subject: Journalism
subject: Health education
subject: health communication
subject: health journalism
subject: health journalism education
subject: health journalist training
subject: journalism education
subject: public health journalism

description: Health journalism critiques have often attributed shortcomings to inadequate training of health journalists, but few researchers have examined the educational opportunities available to health journalists. The purpose of this study was to explore how specialized education and training activities impart skills critical to performing health journalism. Eighteen semi-structured interviews were conducted with health journalists and health journalism educators. Interviewees identified skills critical to health journalism and described educational opportunities available to help specialists hone those skills. Educational opportunities vary in depth of coverage of science- and health-related subjects. Interviewees discussed the challenges of obtaining health journalism training and education weighed against benefits of such activities. Interviewee perceptions and experiences echo concepts from science journalism sociology literature, and align with theoretical media influence models. Findings indicate that opportunities exist to target public health messages through health journalists, and public health communicators may find partners for collaboration in health journalism educators.
Fracture mechanics of micro samples: Fundamental considerations
Creators: name: Pippan, Reinhard
name: Wurster, Stefan
name: Kiener, Daniel
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: In this review article we consider the crack growth resistance ofmicrometer and submicrometer sized samples from the fracture mechanics point of view. Standard fracture mechanics test procedures were developed for macroscale samples, and reduction of the specimen dimensions by three to five orders of magnitude has severe consequences. This concerns the interpretation of results obtained by micro and nanomechanics, as well as the life time and failure prediction of micro and nano devices. We discuss the relevant fracture mechanics length scales and their relation to the material specific structural lengths in order to conduct rigorous fracture mechanics experiments. To ensure general validity and applicability of evaluation concepts, these scaling considerations are detailed for ideally brittle, semi brittle and micro ductile crack propagation, subject to both monotonic and cyclic loading. Special attention is devoted to the requirements for determining specimen size for various loading types to measure material characteristic crack propagation resistance at small scales. Finally, we discuss novel possibilities of micron and submicron fracture mechanics tests to improve the basic understanding of specific crack propagation processes.
Families of k-derivations on k-algebras
Creators: name: Bonnet, Philippe
Publisher: name: arXiv
Year: 2006
Subjects: subject: Commutative Algebra (math.AC)
subject: FOS: Mathematics
subject: 13N15; 13A99; 13A50

description: Let $A$ be an integral $k$-algebra of finite type over a field $k$ of characteristic zero. Let ${\cal{F}}$ be a family of $k$-derivations on $A$ and $M_{\cal{F}}$ the $A$-module spanned by ${\cal{F}}$. In this paper, we generalize a result due to A. Nowicki and construct an element $\partial$ of $M_{\cal{F}}$ such that $\ker \partial=\cap_{d\in {\cal{F}}} \ker d$. Such a derivation is called ${\cal{F}}$-minimal. Then we establish a density theorem for ${\cal{F}}$-minimal derivations in $M_{\cal{F}}$.
description: 16 pages
STUDENTS' PERCEPTION TOWARD VIDEO MAKING TASK IN ENGLISH TO IMPROVING STUDENTS' SPEAKING SKILLS A STUDY AT DIPA MAKASSAR UNIVERSITY
Creators: name: SITA LARASATI
name: ABIDIN PAMMU
name: NASMILAH
name: ROSMIATY
Publisher: name: Zenodo
Year: 2023
Subjects: Perception, Speaking Skills, Video, Effect, Improve

description: Abstract

Techniques that teachers can use to improve students' speaking skills and minimize student errors are now becoming prevalent. In a modern era, teachers usually combine their lessons with technological tools to improve students' language skills. This study discuses students’ perception about video making task in improving students speaking skills. The type of research design is mixed method. The population of this research were 219 from Systems Information Department students, Dipa Makassar University and 89 students were selected as the sample. The data collection used questionnaire distribution by Google Form and interview. The purpose of this research was to explore the implementation and the effect of video making task also to determine students’ perception of the learning process in their courses by using video making task in improving their speaking skills. The result of this research indicated that the implementation of video making task in improving students speaking skills encountered several difficulties such as the aspects of students' motivation in video making task, students' experienced differences from preparing courses, students' difficulties in pronunciation and the difficulties that influential to students' self-study and self-correction and students have positive perceptions toward video making task in improving their speaking skills.
SPITZER/IRAC-MIPS Survey of NGC2244: Protostellar Disk Survival in the Vicinity of Hot Stars
Creators: name: Balog, Zoltan
name: Muzerolle, James
name: Rieke, G. H.
name: Su, Kate Y. L.
name: Young, Eric T.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the results from a survey of NGC 2244 from 3.6 to 24 micron with the Spitzer Space Telescope. The 24micron-8micron-3.6micron color composite image of the region shows that the central cavity surrounding the multiple O and B stars of NGC2244 contains a large amount of cool dust visible only at 24micron. Our survey gives a detailed look at disk survivability within the hot-star-dominated environment in this cavity. Using mid infrared two color diagrams ([3.6]-[4.5] vs [5.8]-[8.0]) we identified 337 class II and 25 class I objects out of 1084 objects detected in all four of these bands with photometric uncertainty better than 10%. Including the 24 micron data, we found 213 class II and 20 class I sources out of 279 stars detected also at this latter band. The center of the class II density contours is in very good agreement with the center of the cluster detected in the 2MASS images. We studied the distribution of the class II sources relative to the O stars and found that the effect of high mass stars on the circumstellar disks is significant only in their immediate vicinity.
description: 10 pages, 9 figures accepted for publication in Astrophysical Journal
Conditional quantum-state engineering using ancillary squeezed-vacuum states
Creators: name: Jeong, Hyunseok
name: Lance, Andrew M.
name: Grosse, Nicolai B.
name: Symul, Thomas
name: Lam, Ping Koy
name: Ralph, Timothy C.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate an optical scheme to conditionally engineer quantum states using a beam splitter, homodyne detection and a squeezed vacuum as an ancillar state. This scheme is efficient in producing non-Gaussian quantum states such as squeezed single photons and superpositions of coherent states (SCSs). We show that a SCS with well defined parity and high fidelity can be generated from a Fock state of $n\leq4$, and conjecture that this can be generalized for an arbitrary $n$ Fock state. We describe our experimental demonstration of this scheme using coherent input states and measuring experimental fidelities that are only achievable using quantum resources.
description: 10 pages, 14 figures, use pdf version, high quality figures available on request
APPLICATIONS OF MODEL-BASED SYSTEMS ENGINEERING IN PERFORMANCE-BASED VULNERABILITY ASSESSMENT
Creators: name: Bassam, Seyed Soroush -
Publisher: name: Digital Repository at the University of Maryland
Year: 2015
Subjects: subject: Engineering
subject: Systems science
subject: Model-Based Systems Engineering
subject: Physical Protection Systems
subject: Requirements Analysis
subject: SysML
subject: System Integration
subject: Vulnerability Assessment

description: This thesis discusses the use of a model-based systems engineering (MBSE) approach for physical protection systems (PPS) evaluation. We discuss the role of requirements analysis in Vulnerability Assessment (VA). Then, we discuss different tools that are being used for requirement analysis and demonstrate how requirements modeling tools can be used in analyzing requirements for VA. Next, we review the steps in vulnerability assessment (VA) and describe the use of SysML models in these steps. The thesis presents examples of SysML models that can be used when conducting VA. Such models can enable the development and integration of other VA tools and reduce the time and cost of conducting VA, which will lead to safer facilities.
A study of neutrino propagation and oscillations both in vacuum and in dense media
Creators: name: Kiers, Kenneth Albert
Publisher: name: University of British Columbia
Year: 2009

description: The phenomenon of neutrino oscillations has been studied for many years and is quite well understood. There remain, however, several issues related to the localization of neutrinos in space and time which have not been entirely resolved. In this thesis we present a detailed study of several of these issues and we present some novel approaches which are useful in their resolution. We begin by examining the effects of coherent and incoherent broadening on the oscillations of relativistic neutrinos. Such effects are due to distinct physical processes which could in principle be controlled at the source. We show under very general assumptions that these two types of broadening cannot be distinguished at the detector. The consequences of these issues for the oscillations of solar neutrinos is also discussed. We then present a novel approach to account for the localization in space and time of neutrinos in a typical neutrino oscillation experiment. This is accomplished by modelling the source and detector as spatially and temporally localized oscillators. This simple model allows us to study the effects due to the mass of the exchanged neutrinos and due to the time resolution of the detector. We then study the propagation of neutrinos in dense media. It is shown that the asymmetry of the dispersion relation as a function of the neutrino's momentum leads to several interesting and amusing effects. The dispersion relation has a minimum at a non-zero value of the momentum p~ρG[sub F], where ρ is the number density of particles in the medium. We show that as a result of this minimum a Dirac (but not Majorana) neutrino may be "trapped" by the medium provided its momentum is less than a critical value which is of order ρG[sub F].