cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Late-Type Near-Contact Eclipsing Binary [HH97] FS Aur-79
Creators: name: Austin, S. J.
name: Robertson, J. W.
name: Tycner, C.
name: Campbell, T.
name: Honeycutt, R. K.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The secondary photometric standard star #79 for the FS Aur field (Henden & Honeycutt 1997) designated as [HH97] FS Aur-79 (GSC 1874 399) is a short period (0.2508 days) eclipsing binary whose light curve is a combination of the $β$ Lyr and BY Dra type variables. High signal-to-noise multi-color photometry were obtained using the USNO 1-m telescope. These light curves show asymmetry at quadrature phases (O'Connell effect), which can be modeled with the presence of star spots. A low resolution spectrum obtained with the 3.5-m WIYN telescope at orbital phase 0.76 is consistent with a spectral type of dK7e and dM3e. A radial velocity curve for the primary star was constructed using twenty-four high resolution spectra from the 9.2 m HET. Spectra show H-alpha and H-beta in emission confirming chromospheric activity and possibly the presence of circumstellar material. Binary star models that simultaneously fit the U, B, V, R and RV curves are those with a primary star of mass 0.59+-0.02 Msun, temperature 4100+-25 K, mean radius of 0.67 Rsun, just filling its Roche lobe and a secondary star of mass 0.31+-0.09 Msun, temperature 3425+-25 K, mean radius of 0.48 Rsun, just within its Roche lobe. An inclination angle of 83+-2 degrees with a center of mass separation of 1.62 Rsun is also derived. Star spots, expected for a rotation period of less than a day, had to be included in the modeling to fit the O'Connell effect.
Orbital Magnetism of Active Viscoelastic Suspension
Creators: name: Muhsin, M
name: Sahoo, M
name: Saha, A
Publisher: name: arXiv
Year: 2021
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We consider a dilute suspension of active (self-propelling) particles in a visco-elastic fluid. Particles are charged and constrained to move in a two dimensional harmonic trap. Their dynamics is coupled to a constant magnetic field applied perpendicular to their motion via Lorentz force. Due to the finite activity, the generalised fluctuation-dissipation relation (GFDR) breaks down, driving the system away from equilibrium. While breaking GFDR, we have shown that the system can have finite classical orbital magnetism only when the dynamics of the system contains finite inertia. The orbital magnetic moment has been calculated exactly. Remarkably, we find that when the elastic dissipation time scale of the medium is larger (smaller) than the persistence time scale of the self-propelling particles, the system is diamagnetic (paramagnetic). Therefore, for a given strength of the magnetic field, the system undergoes a novel transition from diamagnetic to paramagnetic state (and vice-versa) simply by tuning the time scales of underlying physical processes, such as, active fluctuations and visco-elastic dissipation. Interestingly, we also find that the magnetic moment, which vanishes at equilibrium, behaves non-monotonically with respect to increasing persistence of self-propulsion, that drives the system out of equilibrium
description: 9 pages
Immersive Stories for Health Information: Design Considerations from Binge Drinking in VR
Creators: name: Zytko, Douglas
name: Ma, Zexin
name: Gleason, Jacob
name: Lundquist, Nathaniel
name: Taylor, Medina
Publisher: name: arXiv
Year: 2021
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: Multimedia (cs.MM)
subject: FOS: Computer and information sciences

description: Immersive stories for health are 360-degree videos that intend to alter viewer perceptions about behaviors detrimental to health. They have potential to inform public health at scale, however, immersive story design is still in early stages and largely devoid of best practices. This paper presents a focus group study with 147 viewers of an immersive story about binge drinking experienced through VR headsets and mobile phones. The objective of the study is to identify aspects of immersive story design that influence attitudes towards the health issue exhibited, and to understand how health information is consumed in immersive stories. Findings emphasize the need for an immersive story to provide reasoning behind character engagement in the focal health behavior, to show the main character clearly engaging in the behavior, and to enable viewers to experience escalating symptoms of the behavior before the penultimate health consequence. Findings also show how the design of supporting characters can inadvertently distract viewers and lead them to justify the detrimental behavior being exhibited. The paper concludes with design considerations for enabling immersive stories to better inform public perception of health issues.
Small-Scale X-ray Variability in the Cassiopeia A Supernova Remnant
Creators: name: Patnaude, D. J.
name: Fesen, R. A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: A comparison of X-ray observations of the Cassiopeia A supernova remnant taken in 2000, 2002, and 2004 with the Chandra ACIS-S3 reveals the presence of several small scale features (<= 10 arcsec) which exhibit significant intensity changes over a 4 year time frame. Here we report on the variability of six features, four of which show count rate increases from ~ 10% to over 90%, and two which show decreases of ~ 30% -- 40%. While extracted 1-4.5 keV X-ray spectra do not reveal gross changes in emission line strengths, spectral fits using non-equilibrium ionization, metal-rich plasma models indicate increased or decreased electron temperatures for features showing increasing or decreasing count rates, respectively. Based on the observed count rate changes and the assumption that the freely expanding ejecta has a velocity of ~ 5000 km/s at the reverse shock front, we estimate the unshocked ejecta to have spatial scale variations of 0.02 - 0.03 pc, which is consistent with the X-ray emitting ejecta belonging to a more diffuse component of the supernova ejecta than that seen in the optically emitting ejecta, which have spatial scales ~ 0.001 pc.
description: 9 pages, 8 figures, to be published in Astronomical Journal
Tunable magnetism in ferroelectric α-In2Se3 by hole-doping
Creators: name: Liu, Chang
name: Wang, Bing
name: Jia, Guanwei
name: Liu, Pengyu
name: Yin, Huabing
name: Guan, Shan
name: Cheng, Zhenxiang
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: Two-dimensional (2D) multiferroics attract intensive investigations because of underlying science and their potential applications. Although many 2D systems have been observed/predicted to be ferroelectric or ferromagnetic, 2D materials with both ferroic properties are still scarce. By using first-principles calculations, we predict that hole-doping can induce robust ferromagnetism in 2D ferroelectric α-In2Se3 due to its unique flat band structure, and the Curie temperature (TC) can be much higher than room temperature. Moreover, the doping concentration, strain, and number of layers can effectively modulate the magnetic moment and the TC of the material. Interestingly, strong magnetoelectric coupling is found at the surface of hole doped multilayer α-In2Se3, which allows non-volatile electric control of magnetization. Our work provides a feasible approach for designing/searching 2D multiferroics with great potential in future device applications, such as memory devices and sensors.
Gauge Symmetry of the Third Kind and Quantum Mechanics as an Infrared Phenomenon
Creators: name: Elze, Hans-Thomas
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We introduce functional degrees of freedom by a new gauge principle related to the phase of the wave functional. Thereby, quantum mechanical systems are seen as dissipatively embedded part of a nonlinear classical structure producing universal correlations. There are a fundamental length and an entropy/area parameter, besides standard couplings. For states that are sufficiently spread over configuration space, quantum field theory is recovered.
description: 12 pages. To appear in the Festschrift "A Sense of Beauty in Physics" dedicated to Adriano Di Giacomo on occasion of his 70th birthday
Magnetization dependent tunneling conductance of ferromagnetic barriers
Creators: name: Wang, Zhe
name: Gutiérrez-Lezama, Ignacio
name: Dumcenco, Dumitru
name: Ubrig, Nicolas
name: Taniguchi, Takashi
name: Watanabe, Kenji
name: Giannini, Enrico
name: Gibertini, Marco
name: Morpurgo, Alberto F.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Recent experiments on van der Waals antiferrmagnets such as CrI3, CrCl3 and MnPS3 have shown that using atomically thin layers as tunnel barriers and measuring the temperature ($T$) and magnetic field ($H$) dependence of the conductance allows their magnetic phase diagram to be mapped. In contrast, barriers made of CrBr3 -- the sole van der Waals ferromagnet investigated in this way -- were found to exhibit small and featureless magnetoconductance, seemingly carrying little information about magnetism. Here we show that -- despite these early results -- the conductance of CrBr3 tunnel barriers does provide detailed information about the magnetic state of atomically thin CrBr3 crystals for $T$ both above and below the Curie temperature ($T_C = 32$ K). Our analysis establishes that the tunneling conductance depends on $H$ and $T$ exclusively through the magnetization $M(H,T)$, over the entire temperature range investigated (2-50 K). The phenomenon is reproduced in detail by the spin-dependent Fowler-Nordheim model for tunneling, and is a direct manifestation of the spin splitting of the CrBr3 conduction band. These findings demonstrate that the investigation of magnetism by tunneling conductance measurements is not limited to antiferromagnets, but can also be applied to ferromagnetic materials.
Functional Quantum Nodes for Entanglement Distribution over Scalable Quantum Networks
Creators: name: Chou, Chin-Wen
name: Laurat, Julien
name: Deng, Hui
name: Choi, Kyung Soo
name: de Riedmatten, Hugues
name: Felinto, Daniel
name: Kimble, H. Jeff
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We demonstrate entanglement distribution between two remote quantum nodes located 3 meters apart. This distribution involves the asynchronous preparation of two pairs of atomic memories and the coherent mapping of stored atomic states into light fields in an effective state of near maximum polarization entanglement. Entanglement is verified by way of the measured violation of a Bell inequality, and can be used for communication protocols such as quantum cryptography. The demonstrated quantum nodes and channels can be used as segments of a quantum repeater, providing an essential tool for robust long-distance quantum communication.
description: 10 pages, 7 figures. Text revised, additional information included in Appendix. Published online in Science Express, 5 April, 2007
Joule expansion of a pure many-body state
Creators: name: Camalet, S.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We derive the Joule expansion of an isolated perfect gas from the principles of quantum mechanics. Contrary to most studies of irreversible processes which consider composite systems, the gas many-body Hilbert space cannot be factorised into Hilbert spaces corresponding to interesting and ignored degrees of freedom. Moreover, the expansion of the gas into the entire accessible volume is obtained for pure states. Still, the number particle density is characterised by a chemical potential and a temperature. We discuss the special case of a boson gas below the Bose condensation temperature.
Closing the loop: nonlinear Taylor vortex flow through the lens of resolvent analysis
Creators: name: Barthel, Benedikt
name: Zhu, Xiaojue
name: McKeon, Beverley J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We present an optimization-based method to efficiently calculate accurate nonlinear models of Taylor vortex flow. We use the resolvent formulation of McKeon & Sharma (2010) to model these Taylor vortex solutions by treating the nonlinearity not as an inherent part of the governing equations but rather as a triadic constraint which must be satisfied by the model solution. We exploit the low rank linear dynamics of the system to calculate an efficient basis for our solution, the coefficients of which are then calculated through an optimization problem where the cost function to be minimized is the triadic consistency of the solution with itself as well as with the input mean flow. Our approach constitutes, what is to the best of our knowledge, the first fully nonlinear and self-sustaining, resolvent-based model described in the literature. We compare our results to direct numerical simulation of Taylor Couette flow at up to five times the critical Reynolds number, and show that our model accurately captures the structure of the flow. Additionally, we find that as the Reynolds number increases the flow undergoes a fundamental transition from a classical weakly nonlinear regime, where the forcing cascade is strictly down scale, to a fully nonlinear regime characterized by the emergence of an inverse (up scale) forcing cascade. Triadic contributions from the inverse and traditional cascade destructively interfere implying that the accurate modeling of a certain Fourier mode requires knowledge of its immediate harmonic and sub-harmonic. We show analytically that this finding is a direct consequence of the structure of the quadratic nonlinearity of the governing equations formulated in Fourier space. Finally, we show that using our model solution as an initial condition to a higher Reynolds number DNS significantly reduces the time to convergence.
The Gauss-Bonnet theorem for vector bundles
Creators: name: Bell, Denis
Publisher: name: arXiv
Year: 2007
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics

description: We give a short proof of the Gauss-Bonnet theorem for a real oriented Riemannian vector bundle $E$ of even rank over a closed compact orientable manifold $M$. This theorem reduces to the classical Gauss-Bonnet-Chern theorem in the special case when $M$ is a Riemannian manifold and $E$ is the tangent bundle of $M$ endowed with the Levi-Civita connection. The proof is based on an explicit geometric construction of the Thom class for 2-plane bundles.
Influence of the contacts on the conductance of interacting quantum wires
Creators: name: Janzen, K.
name: Meden, V.
name: Schoenhammer, K.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We investigate how the conductance G through a clean interacting quantum wire is affected by the presence of contacts and noninteracting leads. The contacts are defined by a vanishing two-particle interaction to the left and a finite repulsive interaction to the right or vice versa. No additional single-particle scattering terms (impurities) are added. We first use bosonization and the local Luttinger liquid picture and show that within this approach G is determined by the properties of the leads regardless of the details of the spatial variation of the Luttinger liquid parameters. This generalizes earlier results obtained for step-like variations. In particular, no single-particle backscattering is generated at the contacts. We then study a microscopic model applying the functional renormalization group and show that the spatial variation of the interaction produces single-particle backscattering, which in turn leads to a reduced conductance. We investigate how the smoothness of the contacts affects G and show that for decreasing energy scale its deviation from the unitary limit follows a power law with the same exponent as obtained for a system with a weak single-particle impurity placed in the contact region of the interacting wire and the leads.
description: 10 page, 4 figures included, minor changes in the summary, version accepted for publication in PRB
Optimal Normal Bases Over Finite Fields
Creators: name: Krishna, Duggirala Meher
name: Ravi, Duggirala
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Mathematics (math.GM)
subject: FOS: Mathematics

description: In this paper, a method for constructing a near optimal normal basis for algebraic extensions of a finite field is described. In each extension, except for the squares of basis elements, the product of two distinct normal basis elements can be expressed as a linear combination of those two basis elements, with coefficients in a much smaller subfield.
Household pets and depression among urban adolescents
Creators: name: Nevin-Haas, Mary M.
Publisher: name: University of British Columbia
Year: 2008

description: This study was designed to describe the prevalence of depression among a group of adolescents and examine the relationships between depression and presence of pets in the home, primary ownership of pets and perceived degree of attachment to the pets by the subjects. The coping conceptual framework of Folkman and Lazarus (1988) provided the structure for the study. Subjects were 401 grade nine males and females attending three Vancouver and three Victoria secondary schools. The instruments utilized to gather the data were the Center for Epidemiologic Studies Depression Scale (CES-D) (Radloff, 1977) and the Adolescent and Pet Characteristics Questionnaire, developed by the researcher. The subjects completed the instruments anonymously in classroom settings. Among the grade nine students sampled, 48.4% demonstrated no depressive symptoms, 41.4% demonstrated what were classified as mild symptoms of depression, 8.7% demonstrated moderate symptoms of depression, and 1.5% of those sampled indicated severe depressive symptoms. Female adolescents were significantly more depressed than their male counterparts with mean depression scores being 18.7 and 15.1, respectively. Those subjects with pets in the home were significantly less depressed than their counterparts without household pets. There was no relationship between gender and pet ownership combined with level of depression. An analysis of primary pet ownership indicated that subjects who owned their own pets were significantly more depressed on a whole than those in homes where the pet was owned by the entire family. Perceived degree of attachment to the household pet was not related to depression among the subjects. Conclusions are drawn from the findings and implications for nursing practice and research are discussed.
Diffusionseigenschaften von Nickel in einer Festoxid-Brennstoffzelle
Creators: name: Haremski, Patricia
Publisher: name: KIT Scientific Publishing
Year: 2021
Subjects: Nickel
Diffusion
Korngrenzenergie
SOFC
Festoxid-Brennstoffzelle
nickel
diffusion
grain boundary energy
solid oxide fuel cell

description: In dieser Arbeit wurden Thermal Grooving Experimente an Anodenmikrostrukturen, Ni-Polykristallen sowie Ni-Bikristallen durchgeführt und die Korngrenzfurchen mittels eines AFM vermessen. Die Ergebnisse liefern erstmals zuverlässige Werte sowie die komplette Anisotropie der relevanten Materialparameter – der relativen Korngrenzenergien und der Oberflächendiffusionskoeffizienten – von Nickel unter realitätsnahen Betriebsbedingungen einer SOFC-Anode.
The experimental feature on the data of the primary proton identification in stratospheric X-ray emulsion chambers at energies >10 TeV (RUNJOB experiment)
Creators: name: Zayarnaya, I. S.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The RUNJOB balloon-born emulsion chamber experiments have been carried out for investigating the composition and energy spectra of primary cosmic rays at energies 10-1000 TeV/nucleon. On the data of the treatment of RUNJOB` X-ray emulsion chambers exposed since 1995 to 1999 year about 50 % proton tracks were identified. In remained half of the events from proton group the one charged primary tracks were not found in the search area determined with high accuracy by the triangulation method using the several background heavy tracks. Considered methodical reasons in this paper could not explain this experimental result. The one from the probable physical reasons that is the neutrons in cosmic ray flux does not explain it too.
description: 8 pages, 2 figures
Large-scale inference and graph theoretical analysis of gene-regulatory networks in B. stubtilis
Creators: name: Christensen, C.
name: Gupta, A.
name: Maranas, C. D.
name: Albert, R.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Molecular Networks (q-bio.MN)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Subcellular Processes (q-bio.SC)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: We present the methods and results of a two-stage modeling process that generates candidate gene-regulatory networks of the bacterium B. subtilis from experimentally obtained, yet mathematically underdetermined microchip array data. By employing a computational, linear correlative procedure to generate these networks, and by analyzing the networks from a graph theoretical perspective, we are able to verify the biological viability of our inferred networks, and we demonstrate that our networks' graph theoretical properties are remarkably similar to those of other biological systems. In addition, by comparing our inferred networks to those of a previous, noisier implementation of the linear inference process [17], we are able to identify trends in graph theoretical behavior that occur both in our networks as well as in their perturbed counterparts. These commonalities in behavior at multiple levels of complexity allow us to ascertain the level of complexity to which our process is robust to noise.
description: 22 pages, 4 figures, accepted for publication in Physica A (2006)
A critical test of empirical mass loss formulae applied to individual giants and supergiants
Creators: name: Schroder, Klaus-Peter
name: Cuntz, Manfred
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: To test our new, improved Reimers-type mass-loss relation, given by Schroder & Cuntz in 2005 (ApJL 630, L73), we take a look at the best studied galactic giants and supergiants - particularly those with spatially resolved circumstellar shells and winds, obtained directly or by means of a companion acting as a probing light source. Together with well-known physical parameters, the selected stars provide the most powerful and critical observational venues for assessing the validity of parameterized mass-loss relations for cool winds not driven by molecules or dust. In this study, star by star, we compare our previously published relation with the original Reimers relation (1975), the Lamers relation (1981), and the two relations by de Jager and his group (1988, 1990). The input data, especially the stellar masses, have been constrained using detailed stellar evolution models. We find that only the relationship by Schroder & Cuntz agrees, within the error bars, with the observed mass-loss rates for all giants and supergiants.
description: 11 pages, 5 Figs. accepted by Astronomy & Astrophysics
Karolus'un Ölümüne Ağıt – Planctus de Obitu Karoli
Creators: name: Ofli, Erdinç
Publisher: name: Zenodo
Year: 2023
Subjects: Karolus Magnus
Franklar
planctus
Karolenjler
Karolenj yazını

description: As one of the most important political leaders in the history of medieval Europe, Karolus Magnus (Charlemagne, 768-814) was a prominent figure in medieval literary narratives both in his own time and in the centuries following his death. His political career, which saw him rise to the rank of emperor, was the subject of many works throughout the Middle Ages. In this study, the Planctus De Obitu Karoli (Lament on the Death of Karolus), which was written for the death of Karolus in 814, was analysed and translated into Turkish. This short lament (planctus) draws attention to the profound influence of Karolus Magnus as a ruler on Europe and the Christian world, as well as to the great sadness caused by his death, and with its religious and political references it also contains valuable clues for the construction of the image of Karolus Magnus in the centuries to come.
FILOU oscillation code
Creators: name: Suarez, J. C.
name: Goupil, M. J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The present paper provides a description of the oscillation code FILOU, its main features, type of applications it can be used for, and some representative solutions. The code is actively involved in CoRoT/ESTA exercises (this volume) for the preparation for the proper interpretation of space data from the CoRoT mission. Although CoRoT/ESTA exercises have been limited to the oscillations computations for non-rotating models, the main characteristic of FILOU is, however, the computation of radial and non-radial oscillation frequencies in presence of rotation. In particular, FILOU calculates (in a perturbative approach) adiabatic oscillation frequencies corrected for the effects of rotation (up to the second order in the rotation rate) including near degeneracy effects. Furthermore, FILOU works with either a uniform rotation or a radial differential rotation profile (shellular rotation), feature which makes the code singular in the field.
description: 6 pages, 5 figures. Astrophysics and Space Science (in press)
Molecular junctions in the Coulomb blockade regime: rectification and nesting
Creators: name: Song, Bo
name: Ryndyk, Dmitry A.
name: Cuniberti, Gianaurelio
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Quantum transport through single molecules is very sensitive to the strength of the molecule-electrode contact. Here, we investigate the behavior of a model molecular junction weakly coupled to external electrodes in the case where charging effects do play an important role (Coulomb blockade regime). As a minimal model we consider a molecular junction with two spatially separated donor and acceptor sites. Depending on their mutual coupling to the electrodes, the resulting transport observables show well defined features such as rectification effects in the I-V characteristics and nesting of the stability diagrams. To be able to accomplish these results, we have developed a theory which allows to explore the charging regime via the nonequilibrium Green function formalism parallel to the widely used master equation technique. Our results, beyond their experimental relevance, offer a transparent framework for the systematic and modular inclusion of a richer physical phenomenology.
The warm-up phase in massive star-forming cores around RCW 120
Creators: name: Kirsanova, M. S.
name: Salii, S. V.
name: Kalenskii, S. V.
name: Wiebe, D. S.
name: Sobolev, A. M.
name: Boley, P. A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We study molecular emission in a massive condensation at the border of the HII region RCW 120, paying particular attention to the Core 1 and Core 2 objects, the most massive fragments of the condensation found previously by ALMA. The latter fragment was previously suggested to host a high-mass analogue of Class 0 young stellar object. We present spectra of molecular emission in the 1 mm range made with the APEX telescope. We detect CH$_3$OH and C$^{34}$S lines in Core 1 and Core 2. The CH$_3$CN series and the SO$_2$ lines are only found in Core 2. We estimate gas physical parameters using methanol lines and obtain gas temperature less than 100 K in both regions. Molecular hydrogen number density in Core 2 is in the range of $10^5-10^7$ cm$^{-3}$ and is more uncertain in Core 1. However, the detection of the CH$_3$CN lines corresponding to highly excited transitions ($E_{\rm u}> 400$~K) in Core~2 indicates that the region contains hot gas, while the abundances of CH$_3$OH, CS, SO$_2$ and CH$_3$CN are quite low for a hot core stage. We propose that Core 2 is in the warm-up phase prior to the establishing of the hot gas chemistry. We suggest that Core 2 is in the beginning of the hot core stage. There are no detected CH$_3$CN lines in Core 1, therefore, it might be on an even less evolved evolutionary stage.
description: 11 pages, 6 figures, accepted by MNRAS
Molecular line intensities as measures of cloud masses - I. Sensitivity of CO emissions to physical parameter variations
Creators: name: Bell, T. A.
name: Roueff, E.
name: Viti, S.
name: Williams, D. A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: A reliable estimate of the molecular gas content in galaxies plays a crucial role in determining their dynamical and star-forming properties. However, H2, the dominant molecular species, is difficult to observe directly, particularly in the regions where most molecular gas is thought to reside. Its mass is therefore commonly inferred by assuming a direct proportionality with the integrated intensity of the CO(J=1-0) emission line, using a CO-to-H2 conversion factor, X. Although a canonical value for X is used extensively in such estimates, there is increasing evidence, both theoretical and observational, that the conversion factor may vary by over an order of magnitude under conditions different to those of the local neighbourhood. In an effort to understand the influence of changing environmental conditions on the conversion factor, we derive theoretical estimates of X for a wide range of physical parameters using a photon-dominated region (PDR) time-dependent chemical model, benchmarking key results against those of an independent PDR code to ensure reliability. Based on these results, the sensitivity of the X factor to change in each physical parameter is interpreted in terms of the chemistry and physical processes within the cloud. In addition to confirming previous observationally derived trends, we find that the time-dependence of the chemistry, often neglected in such models, has a considerable influence on the value of the conversion factor.
description: 9 pages, 8 figures, accepted for publication in MNRAS
SalmoBase2.0: An integrative genomic data resource for salmonids
Creators: name: Namouchi, Amine
name: Nome, Torfinn
name: Thu-Hien  To
name: Grønvold, Lars
name: Sandve, Simen Rød
name: Våge, Dag Inge
Publisher: name: F1000 Research Limited
Year: 2019

description: SalmoBase (salmobase.org) is developed, hosted and maintained by the Ås node of ELIXIR Norway, located at the Norwegian University of Life Sciences, Ås, Norway. Here, we present the new release of SalmoBase. The major goals of this new release are as follow (i) Offer new features with an intuitive user interface (ii) Make the available omics data searchable (iii) Connect all the different omics data to offer to users a better overview about their request (iv) Explore and visualise duplicated genes and synteny maps (v) Ensure the scalability of SalmoBase as new species and omics data will be made publicly available.
Dark Matter and Sterile Neutrinos
Creators: name: Biermann, Peter L.
name: Munyaneza, Faustin
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Dark matter has been recognized as an essential part of matter for over 70 years now, and many suggestions have been made, what it could be. Most of these ideas have centered on Cold Dark Matter, particles that are predicted in extensions of standard particle physics, such as supersymmetry. Here we explore the concept that dark matter is sterile neutrinos, particles that are commonly referred to as Warm Dark Matter. Such particles have keV masses, and decay over a very long time, much longer than the Hubble time. In their decay they produce X-ray photons which modify the ionization balance in the very early universe, increasing the fraction of molecular Hydrogen, and thus help early star formation. Sterile neutrinos may also help to understand the baryon-asymmetry, the pulsar kicks, the early growth of black holes, the minimum mass of dwarf spheroidal galaxies, as well as the shape and smoothness of dark matter halos. As soon as all these tests have been made quantitative in their various parameters, we may focus on the creation mechanism of these particles, and could predict the strength of the sharp X-ray emission line, expected from any large dark matter assembly. A measurement of this X-ray emission line would be definitive proof for the existence of may be called weakly interacting neutrinos, or WINs.
description: 18 pages, To appear in Proceedings of the 11th Marcel Grossmann Meeting on General Relativity, 23-29 July 2006, Berlin, Germany
Spin chains and channels with memory
Creators: name: Plenio, M. B.
name: Virmani, S.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In most studies of the channel capacity of quantum channels, it is assumed that the errors in each use of the channel are independent. However, recent work has begun to investigate the effects of memory or correlations in the error. This work has led to speculation that interesting non-analytic behaviour may occur in the capacity. Motivated by these observations, we connect the study of channel capacities under correlated error to the study of critical behaviour in many-body physics. This connection enables us the techniques of many-body physics to either completely solve or understand qualitatively a number of interesting models of correlated error. The models can display analogous behaviour to associated many-body systems, including `phase transitions'.
description: V2: changes in presentation, some additional comments on generalisation. V3: In accordance with published version, most (but not all) details of proofs now included. A separate paper will shortly be submitted separately with all details and more results
UseGalaxy.eu: Community, Training, Infrastructure, and Users
Creators: name: Rasche, Helena
name: Galaxy Project Europe
Publisher: name: F1000 Research Limited
Year: 2019

description: With the UseGalaxy.eu server we provide access to: Free compute and storage resources more than 2000 different, well-documented and constantly maintained bioinformatics tools 250 GB per user free registration Login with ELIXIR AAI When this effort is combined with our community-maintained workflows and our in-depth training material, it makes up for a truly productive work experience. We believe in enabling everyone to perform reproducible science.
Grammatical and phonological elicitation: Wordhood and stress
Creators: name: Palacio, Frank
name: Dabkowski, Maksymilian
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2022
Subjects: subject: cab

description: Stress and phonological wordhood with -gi 'still,' potential -di, future -ba, imperfective -j̃ei, passive -wa, nonfuture -mu.
The influence of spin-dependent phases of tunneling electrons on the conductance of a point ferromagnet/isolator/superconductor contact
Creators: name: Vodopyanov, B. P.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The Andreev reflection probability for a ferromagnet/isolator/superconductor (FIS) contact at the arbitrary spin-dependent amplitudes of the electron waves transmitted through and reflected from the potential barrier is found. It is shown that Andreev reflection probabilities of electron and hole excitations in the FIS contact are different. The energy levels of Andreev bound states are found. The ballistic conductance of the point FIS contact is calculated.
description: e.g.:10 pages, 3 figures added in tex. file: abstract and article's title
Extracting infrared QCD coupling from meson spectrum
Creators: name: Baldicchi, M.
name: Prosperi, G. M.
name: Simolo, C.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In the framework of the Bethe-Salpeter formalism used in previous papers to evaluate the quarkonium spectrum, here we reverse the point of view to extract an ``experimental'' running coupling alpha_s(Q^2) in the infrared (IR) region from the data. The values so obtained agree within the errors with the Shirkov-Solovtsov analytic coupling for 200 MeV
description: Talk given at 7th International Conference on Quark Confinement and the Hadron Spectrum, Azores - Portugal, 2-7 Sep 2006. To be published in AIP Conf.Proc
Periodic and Localized Solutions of the Long Wave-Short Wave Resonance Interaction Equation
Creators: name: Radha, R.
name: Kumar, C. Senthil
name: Lakshmanan, M.
name: Tang, X. Y.
name: Lou, S. Y.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: In this paper, we investigate the (2+1) dimensional long wave-short wave resonance interaction (LSRI) equation and show that it possess the Painlevé property. We then solve the LSRI equation using Painlevé truncation approach through which we are able to construct solution in terms of three arbitrary functions. Utilizing the arbitrary functions present in the solution, we have generated a wide class of elliptic function periodic wave solutions and exponentially localized solutions such as dromions, multidromions, instantons, multi-instantons and bounded solitary wave solutions.
description: 13 pages, 6 figures
Clustering of dark matter tracers: renormalizing the bias parameters
Creators: name: McDonald, Patrick
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: A commonly used perturbative method for computing large-scale clustering of tracers of mass density, like galaxies, is to model the tracer density field as a Taylor series in the local smoothed mass density fluctuations, possibly adding a stochastic component. I suggest a set of parameter redefinitions, eliminating problematic perturbative correction terms, that should represent a modest improvement, at least, to this method. As presented here, my method can be used to compute the power spectrum and bispectrum to 4th order in initial density perturbations, and higher order extensions should be straightforward. While the model is technically unchanged at this order, just reparameterized, the renormalized model is more elegant, and should have better convergence behavior, for three reasons: First, in the usual approach the effects of beyond-linear-order bias parameters can be seen at asymptotically large scales, while after renormalization the linear model is preserved in the large-scale limit, i.e., the effects of higher order bias parameters are restricted to relatively high k. Second, while the standard approach includes smoothing to suppress large perturbative correction terms, resulting in dependence on the arbitrary cutoff scale, no cutoff-sensitive terms appear explicitly after my redefinitions (and, relatedly, my correction terms are less sensitive to high-k, non-linear, power). Third, the 3rd order bias parameter disappears entirely, so my model has one fewer free parameter than usual (this parameter was redundant at the order considered). This model predicts a small modification of the baryonic acoustic oscillation (BAO) signal, in real space, supporting the robustness of BAO as a probe of dark energy, and providing a complete perturbative description over the relevant range of scales.
description: fixed factor of 2 in one term, results not qualitatively changed
A Manifold Calculus Approach to Link Maps and the Linking Number
Creators: name: Munson, Brian
Publisher: name: arXiv
Year: 2007
Subjects: subject: Algebraic Topology (math.AT)
subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 57R99 (primary) 57R90, 57M25, 57Q25, 55S35, 55P99 (secondary)

description: We study the space of "link maps": the space of maps of a disjoint union of compact, closed manifolds P_1, . . ., P_k into a manifold N whose images are pairwise disjoint. We apply the manifold calculus of functors developed by Goodwillie and Weiss to study the difference between it and its linear and quadratic approximations. We identify an appropriate generalization of the linking number as the geometric object which measures the difference between the space of link maps and its linear approximation. Our analysis of the difference between link maps and its quadratic approximation connects with recent work of the author, and is used to show that the Borromean rings are linked. We also conjecture connectivity estimates for the approximating spaces.
description: 32 pages, minor changes to sections 2.3, 6.5, 6.6
Randomness enhances cooperation: a resonance type phenomenon in evolutionary games
Creators: name: Ren, Jie
name: Wang, Wen-Xu
name: Qi, Feng
Publisher: name: arXiv
Year: 2006
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Biological Physics (physics.bio-ph)
subject: Populations and Evolution (q-bio.PE)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: We investigate the effect of randomness in both relationships and decisions on the evolution of cooperation. Simulation results show, in such randomness' presence, the system evolves to a more frequency cooperation state than in its absence. Specifically, there is an optimal amount of randomness, which can induce the highest level of cooperation. The mechanism of randomness promoting cooperation resembles a coherence-resonance-like fashion, which could be of particular interest in evolutionary game dynamics in economic, biological and social systems.
description: 4 pages, 5 figures
On the number of rational squares at fixed distance from a fifth power
Creators: name: Stoll, Michael
Publisher: name: arXiv
Year: 2006
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11D41, 11D45, 11G30, 14G05, 14G25 (Primary) 11G10, 14H25, 14H40 (Secondary)

description: The main result of this note is that there are at most seven rational points (including the one at infinity) on the curve C_A with the affine equation y^2 = x^5 + A (where A is a tenth power free integer) when the Mordell-Weil rank of the Jacobian of C_A is one. This bound is attained for A = 18^2.
description: 10 pages
Magnetic Fields in Stellar Jets
Creators: name: Hartigan, P.
name: Frank, A.
name: Varniere, P.
name: Blackman, E.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Although several lines of evidence suggest that jets from young stars are driven magnetically from accretion disks, existing observations of field strengths in the bow shocks of these flows imply that magnetic fields play only a minor role in the dynamics at these locations. To investigate this apparent discrepancy we performed numerical simulations of expanding magnetized jets with stochastically variable input velocities with the AstroBEAR MHD code. Because the magnetic field B is proportional to the density n within compression and rarefaction regions, the magnetic signal speed drops in rarefactions and increases in the compressed areas of velocity-variable flows. In contrast, B ~ n^0.5 for a steady-state conical flow with a toroidal field, so the Alfven speed in that case is constant along the entire jet. The simulations show that the combined effects of shocks, rarefactions, and divergent flow cause magnetic fields to scale with density as an intermediate power 1 > p > 0.5. Because p > 0.5, the Alfven speed in rarefactions decreases on average as the jet propagates away from the star. This behavior is extremely important to the flow dynamics because it means that a typical Alfven velocity in the jet close to the star is significantly larger than it is in the rarefactions ahead of bow shocks at larger distances, the one place where the field is a measurable quantity. We find that the observed values of weak fields at large distances are consistent with strong fields required to drive the observed mass loss close to the star. For a typical stellar jet the crossover point inside which velocity perturbations of 30 - 40 km/s no longer produce shocks is ~ 300 AU from the source.
Consent for Medical Treatment of Trans Youth: A Comparative Analysis of the Law in Australia and in England and Wales
Creators: name: Jowett, Steph
name: Mathews, Ben
name: Herring, Jonathan
Publisher: name: Monash University
Year: 2024
Subjects: classificationCode: 480407
subject: Law, gender and sexuality (incl. feminist legal scholarship)

description: Clinical and legal regulation of consent to medical treatment for trans youth, both binary and non-binary, is complex as well as controversial. In this article, we outline the clinical context in which consent is sought for gender-affirming medical treatment of trans youth in Australia and in England and Wales. Then, informed by an understanding of the developing evidence base behind early gender-affirming treatment, the lived experience of trans young people, and a developmental approach to capacity in decision-making regarding medical treatment, this article goes on to consider the justifiability of current legal regulation in this area. First, this article examines general principles in relation to consent for children’s medical care, then charts the development of those principles through key cases that have shaped this particular area of law in Australia, England and Wales. These developments are then synthesised and compared in respect of the extent to which they promote or impede autonomous decision-making in the respective jurisdictions. We identify decisive similarities and differences between the jurisdictions, along with the likely practical implications for trans youth, their families, and treating doctors. Our analysis adds further weight to the growing consensus spanning the judiciary, doctors, legal scholars, and interest groups, that the law in Australia should be reformed to reduce unnecessary and harmful barriers to treatment for all trans youth.