cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Gaia data release 1: Principles of the photometric calibration of the G band
Creators: name: Carrasco, J. M.
name: Evans, D. W.
name: Montegriffo, P.
name: Jordi, C.
name: van Leeuwen, F.
name: Riello, M.
name: Voss, H.
name: De Angeli, F.
name: Busso, G.
name: Fabricius, C.
name: Cacciari, C.
name: Weiler, M.
name: Pancino, E.
name: Brown, A. G. A.
name: Holland, G.
name: Burgess, P.
name: Osborne, P.
name: Altavilla, G.
name: Gebran, M.
name: Ragaini, S.
name: Galleti, S.
name: Cocozza, G.
name: Marinoni, S.
name: Bellazzini, M.
name: Bragaglia, A.
name: Federici, L.
name: Balaguer-Núñez, L.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Context. Gaia is an ESA cornerstone mission launched on 19 December 2013 aiming to obtain the most complete and precise 3D map of our Galaxy by observing more than one billion sources. This paper is part of a series of documents explaining the data processing and its results for Gaia Data Release 1, focussing on the G band photometry. Aims. This paper describes the calibration model of the Gaia photometric passband for Gaia Data Release 1. Methods. The overall principle of splitting the process into internal and external calibrations is outlined. In the internal calibration, a self-consistent photometric system is generated. Then, the external calibration provides the link to the absolute photometric flux scales. Results. The Gaia photometric calibration pipeline explained here was applied to the first data release with good results. Details are given of the various calibration elements including the mathematical formulation of the models used and of the extraction and preparation of the required input parameters (e.g. colour terms). The external calibration in this first release provides the absolute zero point and photometric transformations from the Gaia G passband to other common photometric systems. Conclusions. This paper describes the photometric calibration implemented for the first Gaia data release and the instrumental effects taken into account. For this first release no aperture losses, radiation damage, and other second-order effects have not yet been implemented in the calibration.
description: 15 pages, 16 figures, Gaia data release 1 documentation special volume
Generic Torus Canards
Creators: name: Vo, Theodore
Publisher: name: arXiv
Year: 2016
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 34E17, 34C29, 34C15, 37N25, 34E15, 37G15, 34C20, 34C45

description: Torus canards are solutions of slow/fast systems that alternate between attracting and repelling manifolds of limit cycles of the fast subsystem. A relatively new dynamic phenomenon, torus canards have been found in neural applications to mediate the transition from spiking to bursting via amplitude-modulated spiking. In $\mathbb{R}^3$, torus canards are degenerate: they require one-parameter families of 2-fast/1-slow systems in order to be observed and even then, they only occur on exponentially thin parameter intervals. The addition of a second slow variable unfolds the torus canard phenomenon, making them generic and robust. That is, torus canards in slow/fast systems with (at least) two slow variables occur on open parameter sets. So far, generic torus canards have only been studied numerically, and their behaviour has been inferred based on averaging and canard theory. This approach, however, has not been rigorously justified since the averaging method breaks down near a fold of periodics, which is exactly where torus canards originate. In this work, we combine techniques from Floquet theory, averaging theory, and geometric singular perturbation theory to show that the average of a torus canard is a folded singularity canard. In so doing, we devise an analytic scheme for the identification and topological classification of torus canards in $\mathbb{R}^4$. We demonstrate the predictive power of our results in a model for intracellular calcium dynamics, where we explain the mechanisms underlying a novel class of elliptic bursting rhythms, called amplitude-modulated bursting, by constructing the torus canard analogues of mixed-mode oscillations. We also make explicit the connection between our results here with prior studies of torus canards and torus canard explosion in $\mathbb{R}^3$, and discuss how our methods can be extended to slow/fast systems of arbitrary (finite) dimension.
description: 54 pages, 19 figures
title: Primary cavitary sarcoidosis with “galaxy sign”
Creators: name: Havaux, Matthieu
Publisher: name: EURORAD
Year: 2024
Subjects: subject: Chest imaging
subject: Lung
subject: CT-Angiography
subject: Clinical Case

description: Clinical History: A 31-year-old female patient presented to the Emergency Unit with recent chest pain, 11 days after being tested positive for COVID-19. The pain was not radiating, pleuritic or reproduced by palpation. Chest auscultation findings disclosed rhonchi and wheezes on the right lung. The rest of the physical examination was normal.

description: 31 years, female
Inference from the small scales of cosmic shear with current and future Dark Energy Survey data
Creators: name: MacCrann, N.
name: Aleksić, J.
name: Amara, A.
name: Bridle, S. L.
name: Bruderer, C.
name: Chang, C.
name: Dodelson, S.
name: Eifler, T. F.
name: Huff, E. M.
name: Huterer, D.
name: Kacprzak, T.
name: Refregier, A.
name: Suchyta, E.
name: Wechsler, R. H.
name: Zuntz, J.
name: Abbott, T. M. C.
name: Allam, S.
name: Annis, J.
name: Armstrong, R.
name: Benoit-Lévy, A.
name: Brooks, D.
name: Burke, D. L.
name: Rosell, A. Carnero
name: Kind, M. Carrasco
name: Carretero, J.
name: Castander, F. J.
name: Crocce, M.
name: Cunha, C. E.
name: da Costa, L. N.
name: Desai, S.
name: Diehl, H. T.
name: Dietrich, J. P.
name: Doel, P.
name: Evrard, A. E.
name: Flaugher, B.
name: Fosalba, P.
name: Gerdes, D. W.
name: Goldstein, D. A.
name: Gruen, D.
name: Gruendl, R. A.
name: Gutierrez, G.
name: Honscheid, K.
name: James, D. J.
name: Jarvis, M.
name: Krause, E.
name: Kuehn, K.
name: Kuropatkin, N.
name: Lima, M.
name: Marshall, J. L.
name: Melchior, P.
name: Menanteau, F.
name: Miquel, R.
name: Plazas, A. A.
name: Romer, A. K.
name: Rykoff, E. S.
name: Sanchez, E.
name: Scarpine, V.
name: Sevilla-Noarbe, I.
name: Sheldon, E.
name: Soares-Santos, M.
name: Swanson, M. E. C.
name: Tarle, G.
name: Thomas, D.
name: Vikram, V.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Cosmic shear is sensitive to fluctuations in the cosmological matter density field, including on small physical scales, where matter clustering is affected by baryonic physics in galaxies and galaxy clusters, such as star formation, supernovae feedback and AGN feedback. While muddying any cosmological information that is contained in small scale cosmic shear measurements, this does mean that cosmic shear has the potential to constrain baryonic physics and galaxy formation. We perform an analysis of the Dark Energy Survey (DES) Science Verification (SV) cosmic shear measurements, now extended to smaller scales, and using the Mead et al. 2015 halo model to account for baryonic feedback. While the SV data has limited statistical power, we demonstrate using a simulated likelihood analysis that the final DES data will have the statistical power to differentiate among baryonic feedback scenarios. We also explore some of the difficulties in interpreting the small scales in cosmic shear measurements, presenting estimates of the size of several other systematic effects that make inference from small scales difficult, including uncertainty in the modelling of intrinsic alignment on nonlinear scales, `lensing bias', and shape measurement selection effects. For the latter two, we make use of novel image simulations. While future cosmic shear datasets have the statistical power to constrain baryonic feedback scenarios, there are several systematic effects that require improved treatments, in order to make robust conclusions about baryonic feedback.
description: 14 pages, 10 figures
A construction of certain weak colimits and an exactness property of the 2-category of categories
Creators: name: Descotte, M. E.
name: Dubuc, E. J.
name: Szyld, M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Category Theory (math.CT)
subject: FOS: Mathematics

description: Given a 2-category $\mathcal{A}$, a $2$-functor $\mathcal{A} \overset {F} {\longrightarrow} \mathcal{C}at$ and a distinguished 1-subcategory $Σ\subset \mathcal{A}$ containing all the objects, a $σ$-cone for $F$ (with respect to $Σ$) is a lax cone such that the structural $2$-cells corresponding to the arrows of $Σ$ are invertible. The conical $σ$-limit is the universal (up to isomorphism) $σ$-cone. The notion of $σ$-limit generalises the well known notions of pseudo and lax limit. We consider the fundamental notion of $σ$-filtered} pair $(\mathcal{A}, \, Σ)$ which generalises the notion of 2-filtered 2-category. We give an explicit construction of $σ$-filtered $σ$-colimits of categories, construction which allows computations with these colimits. We then state and prove a basic exactness property of the 2-category of categories, namely, that $σ$-filtered $σ$-colimits commute with finite weighted pseudo (or bi) limits. An important corollary of this result is that a $σ$-filtered $σ$-colimit of exact category valued 2-functors is exact. This corollary is essential in the 2-dimensional theory of flat and pro-representable 2-functors, that we develop elsewhere.
description: 20 pages, many 2-cell diagrams
Observables Processing for the Helioseismic and Magnetic Imager Instrument on the Solar Dynamics Observatory
Creators: name: Couvidat, Sebastien
name: Schou, Jesper
name: Hoeksema, J. Todd
name: Bogart, Rick S.
name: Bush, Rock I.
name: Duvall, Tom L.
name: Liu, Yang
name: Norton, Aimee A.
name: Scherrer, Philip H.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: NASA's Solar Dynamics Observatory (SDO) was launched 11 February 2010 with 3 instruments on board, including the Helioseismic and Magnetic Imager (HMI). Since beginning normal operations on 1 May 2010, HMI has observed the Sun's entire visible disk almost continuously. HMI collects sequences of polarized filtergrams taken at a fixed cadence with two 4096 x 4096 cameras from which are computed arcsecond-resolution maps of photospheric observables: the line-of-sight (LoS) velocity and magnetic field, continuum intensity, line width, line depth, and the Stokes polarization parameters, I Q U V, at 6 wavelengths. Two processing pipelines implemented at the SDO Joint Science Operations Center (JSOC) at Stanford University compute observables from calibrated Level-1 filtergrams. One generates LoS quantities every 45s, and the other, primarily for the vector magnetic field, computes averages on a 720s cadence. Corrections are made for static and temporally changing CCD characteristics, bad pixels, image alignment and distortion, polarization irregularities, filter-element uncertainty and non-uniformity, as well as Sun-spacecraft velocity. This report explains issues affecting the resulting physical quantities, describes the impact of regular updates to the instrument calibration, and shows how the computations are optimized for actual HMI observations. During the 5 years of the SDO prime mission, regular calibration sequences have been used to regularly improve and update the instrument calibration and to monitor instrument changes. The instrument more than satisfies the original specifications for data quality and continuity. The procedures described here still have significant room for improvement. The most significant remaining systematic errors are associated with the spacecraft orbital velocity.
description: Accepted for publication in Solar Physics
An Updated Dust-to-Star Geometry: Dust Attenuation Does Not Depend on Inclination in $1.3\leq z\leq 2.6$ Star-Forming Galaxies from MOSDEF
Creators: name: Lorenz, Brian
name: Kriek, Mariska
name: Shapley, Alice E.
name: Reddy, Naveen A.
name: Sanders, Ryan L.
name: Barro, Guillermo
name: Coil, Alison L.
name: Mobasher, Bahram
name: Price, Sedona H.
name: Runco, Jordan N.
name: Shivaei, Irene
name: Siana, Brian
name: Weisz, Daniel R.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We investigate dust attenuation and its dependence on viewing angle for 308 star-forming galaxies at $1.3\leq z\leq2.6$ from the MOSFIRE Deep Evolution Field (MOSDEF) survey. We divide galaxies with a detected H$α$ emission line and coverage of H$β$ into eight groups by stellar mass, star formation rate (SFR), and inclination (i.e., axis ratio), then stack their spectra. From each stack, we measure Balmer decrement and gas-phase metallicity, then we compute median \AV and UV continuum spectral slope ($β$). First, we find that none of the dust properties (Balmer decrement, \AV, $β$) vary with axis ratio. Second, both stellar and nebular attenuation increase with increasing galaxy mass, showing little residual dependence on SFR or metallicity. Third, nebular emission is more attenuated than stellar emission, and this difference grows even larger at higher galaxy masses and SFRs. Based on these results, we propose a three-component dust model where attenuation predominantly occurs in star-forming regions and large, dusty star-forming clumps, with minimal attenuation in the diffuse ISM. In this model, nebular attenuation primarily originates in clumps, while stellar attenuation is dominated by star-forming regions. Clumps become larger and more common with increasing galaxy mass, creating the above mass trends. Finally, we argue that a fixed metal yield naturally leads to mass regulating dust attenuation. Infall of low-metallicity gas increases SFR and lowers metallicity, but leaves dust column density mostly unchanged. We quantify this idea using the Kennicutt-Schmidt and fundamental metallicity relations, showing that galaxy mass is indeed the primary driver of dust attenuation.
description: 19 pages, 13 figures, accepted for publication in ApJ
Energy Efficiency in Multicast Multihop D2D Networks
Creators: name: Xia, Zicheng
name: Yan, Jiawei
name: Liu, Yuan
Publisher: name: arXiv
Year: 2016
Subjects: subject: Information Theory (cs.IT)
subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: As the demand of mobile devices (MDs) for data services is explosively increasing, traditional offloading in the cellular networks is facing the contradiction of energy efficiency and quality of service. Device-to-device (D2D) communication is considered as an effective solution. This work investigates a scenario where the MDs have the same demand for common content and they cooperate to deliver it using multicast multihop relaying. We focus on the problem of total power minimization by grouping the MDs in multihop D2D networks, while maintaining the minimum rate requirement of each MD. As the problem is shown to be NP-complete and the optimal solution can not be found efficiently, two greedy algorithms are proposed to solve this problem in polynomial time. Simulation results demonstrate that lots of power can be saved in the content delivery situation using multihop D2D communication, and the proposed algorithms are suitable for different situations with different advantages.
description: To appear in IEEE/CIC ICCC 2016
Harmonising, Harvesting, and Searching Metadata across a Repository Federation
Creators: name: Neumann, Steffen
name: Bach, Felix
name: Castro, Leyla
name: Fischer, Tillmann G.
name: Hofmann, Stefan
name: Huang, Pei-Chi
name: Jung, Nicole
name: Katabathuni, Bhavin
name: Mauz, Fabian
name: Meier, René
name: Nainala, Venkata Chandrasekhar
name: Rayya, Noura
name: Steinbeck, Christoph
name: Koepler, Oliver
Publisher: name: Zenodo
Year: 2023
Subjects: Chemistry
Metadata
Bioschemas
OAI-PMH
FAIR

description: Diverse repositories in a Federation serve different type of research data in chemistry research. Generic DataCite captures metadata about the dataset, complemented with domain-specific metadata expressed as (Bio)schemas.org types. Generic and domain-specific Search Services and Knowledge Graphs harvest the metadata.
M giants with IGRINS I. Stellar parameters and $α$-abundance trends of the solar neighborhood population
Creators: name: Nandakumar, G.
name: Ryde, N.
name: Casagrande, L.
name: Mace, G.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Cool stars, such as M giants, can only be analysed in the near-infrared (NIR) regime due to the ubiquitous TiO features in optical spectra of stars with Teff < 4000 K. In dust obscured regions, like the inner bulge and Galactic Center, the intrinsically bright M giants observed in the NIR is an optimal option to determine their stellar abundances. Due to uncertainties in photometric methods, a method to determine the stellar parameters for M giants from the NIR spectra themselves is needed. We have carried out new observations of 44 M giant stars (also in APOGEE DR17) with IGRINS (R=45,000) mounted on the Gemini South telescope. We also obtained HK band IGRINS spectra of six nearby well-studied M giants from the IGRINS spectral library. Using this sample, we have developed a method to determine the stellar parameters for M giants from the NIR spectra by spectral synthesis using SME. The method is validated using the six nearby well-studied M-giants. We demonstrate the accuracy and precision by determining stellar parameters and $α$-element trends versus metallicity for solar neighbourhood M giants. The effective temperatures that we derive (tested for 3400$\lesssim$ Teff $\lesssim$4000\,K) agree excellently with the six nearby M giants which indicates that the accuracy is indeed high. For the 43 solar neighborhood M giants, our Teff, logg, [Fe/H], $ξ_\mathrm{micro}$, [C/Fe], [N/Fe], and [O/Fe] are in unison with APOGEE with mean differences and scatter (our method - APOGEE) of -67$\pm$33 K, -0.31$\pm$0.15 dex, 0.02$\pm$0.05 dex, 0.22$\pm$0.13 km/s, -0.05$\pm$0.06 dex, 0.06$\pm$0.06 dex, and 0.02$\pm$0.09 dex, respectively. The $α$-element trends versus metallicity for Mg, Si, Ca and Ti are consistent with both APOGEE DR17 trends for the same stars as well as with the GILD optical trends. We also find clear enhancement in abundances for thick disc stars.
description: 27 Pages including appendix of 10 pages, 15 figures, Accepted for publication in A&A
Adsorption and sensing of CS2, H2S and COS gases by pure and metal (Cr, Fe, Ni and Zn) doped GaN nanosheets: a DFT-D study
Creators: name: Yekta, Melody
name: Zanjanchi, Mohammad Ali
name: Roohi, Hossein
name: Ardehjani, Nastaran Askari
Publisher: name: Taylor & Francis
Year: 2023
Subjects: Biophysics
Biochemistry
Space Science
Physical Sciences not elsewhere classified
Medicine
Biotechnology
Environmental Sciences not elsewhere classified
Chemical Sciences not elsewhere classified
Computational Biology

description: The performance of the pure and metal (Cr, Fe, Ni and Zn) doped gallium nitride nanosheets (GaNNSs) for adsorption and sensing of CS2, H2S and COS gases were scrutinised at the Grimme-corrected PBE/DNP level of theory. The range of adsorption energies for CS2 gas was between −5.51 to −16.57 kcal mol−1 for MGa-GaNNS and −18.32 to −65.02 kcal mol−1 for MN-GaNNS so that the highest CS2 adsorption capability was predicted for CrNGaNNS. Based on the adsorption energies for H2S gas (−3.70 to −10.17 kcal mol−1 for MGa-GaNNS and −9.93 to −53.40 kcal mol−1 for MN-GaNNS), CrNGaNNS was estimated to be more suitable for H2S adsorption. The adsorption energies for COS gas on the MGa-GaNNS (−6.26 to −9.18 kcal mol−1) were smaller than those found for MN-GaNNS (−9.83 to −40.80 kcal mol−1), indicating that the capability of FeNGaNNS for COS adsorption is greater than other doped-GaNNSs. From the calculated electronic properties of doped-GaNNSs, it was found that FeNGaNNS could be more suitable for sensing CS2 and H2S gases and CrNGaNNS for the detection of COS gas. The results of the present research make predictions about the most promising systems for sensing and capturing CS2, H2S and COS toxic gases.
Moving inhomogeneous envelopes of stars
Creators: name: Oskinova, Lidia M.
name: Kubatova, Brankica
name: Hamann, Wolf-Rainer
Publisher: name: arXiv
Year: 2016
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Massive stars are extremely luminous and drive strong winds, blowing a large part of their matter into the galactic environment before they finally explode as a supernova. Quantitative knowledge of massive star feedback is required to understand our Universe as we see it. Traditionally, massive stars have been studied under the assumption that their winds are homogeneous and stationary, largely relying on the Sobolev approximation. However, observations with the newest instruments, together with progress in model calculations, ultimately dictate a cardinal change of this paradigm: stellar winds are highly inhomogeneous. Hence, we are now advancing to a new stage in our understanding of stellar winds. Using the foundations laid by V.V. Sobolev and his school, we now update and further develop the stellar spectral analysis techniques. New sophisticated 3-D models of radiation transfer in inhomogeneous expanding media elucidate the physics of stellar winds and improve classical empiric mass-loss rate diagnostics. Applications of these new techniques to multiwavelength observations of massive stars yield consistent and robust stellar wind parameters.
description: slightly corrected version of the review for the special issue "V.V. Sobolev and his Legacy", Journal of Quantitative Spectroscopy and Radiative Transfer
The Effelsberg survey of FU~Orionis and EX~Lupi objects II. -- H$_2$O maser observations
Creators: name: Szabó, Zs. M.
name: Gong, Y.
name: Yang, W.
name: Menten, K. M.
name: Bayandina, O. S.
name: Cyganowski, C. J.
name: Kóspál, Á.
name: Ábrahám, P.
name: Belloche, A.
name: Wyrowski, F.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: FU Orionis (FUor) and EX Lupi (EXor) type objects are two groups of peculiar and rare pre-main sequence low-mass stars that are undergoing powerful accretion outbursts during their early stellar evolution. Water masers are widespread in star forming regions and are powerful probes of mass accretion and ejection, but little is known about the prevalence of them toward FUors/EXors. We perform the first systematic search for the 22.2 GHz water maser line in FUors/EXors to determine its overall incidence to perform follow-up high angular resolution observations. We used the Effelsberg 100-m radio telescope to observe the 22.2 GHz H2O maser toward a sample of 51 objects. We detect 5 water masers; 3 are associated with eruptive stars, resulting in a 6% detection rate for eruptive sources. These detections include one EXor, V512 Per (also known as SVS 13 or SVS 13A), and two FUors, Z CMa and HH 354 IRS. This is the first reported detection of water maser emission towards HH 354 IRS. We detect water maser emission in our pointing towards the FUor binary RNO 1B/1C, which most likely originates from the nearby deeply embedded source IRAS 00338+6312 (~4'', from RNO 1B/1C). Emission was also detected from H$_2$O(B) (also known as SVS 13C), a Class 0 source ~30'', from the EXor V512 Per. The peak flux density of H$_2$O(B) in our observations, 498.7 Jy, is the highest observed to date. In addition to the two non-eruptive Class 0 sources (IRAS 00338+6312 and H$_2$O(B) /SVS 13C), we detect maser emission towards one Class 0/I (HH 354 IRS) and two Class I (V512 Per and Z CMa) eruptive stars. We demonstrate the presence of 22.2 GHz water maser emission in FUor/EXor systems, opening the way to radio interferometric observations to study these eruptive stars on small scales. Comparing our data with historical observations suggest that multiple water maser flares have occurred in both V512 Per and H$_2$O(B).
description: 12 pages, 8 figures, accepted for publication in Astronomy & Astrophysics
Disentangling the ISM phases of the dwarf galaxy NGC 4214 using [CII] SOFIA/GREAT observations
Creators: name: Fahrion, Katja
name: Cormier, Diane
name: Bigiel, Frank
name: Hony, Sacha
name: Abel, Nick P.
name: Cigan, Phil
name: Csengeri, Timea
name: Graf, Urs
name: Lebouteiller, Vianney
name: Madden, Suzanne C.
name: Wu, Ronin
name: Young, Lisa
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The [CII] 158 um fine structure line is one of the dominant cooling lines in the interstellar medium (ISM) and is an important tracer of star formation. Recent velocity-resolved studies with Herschel/HIFI and SOFIA/GREAT showed that the [CII] line can constrain the properties of the ISM phases in star-forming regions. The [CII] line as a tracer of star formation is particularly important in low-metallicity environments where CO emission is weak because of the presence of large amounts of CO-dark gas. The nearby irregular dwarf galaxy NGC 4214 offers an excellent opportunity to study an actively star-forming ISM at low metallicity. We analyzed the spectrally resolved [CII] line profiles in three distinct regions at different evolutionary stages of NGC 4214 with respect to ancillary HI and CO data in order to study the origin of the [CII] line. We used SOFIA/GREAT [CII] 158 um observations, HI data from THINGS, and CO(2-1) data from HERACLES to decompose the spectrally resolved [CII] line profiles into components associated with neutral atomic and molecular gas. We use this decomposition to infer gas masses traced by [CII] under different ISM conditions. Averaged over all regions, we associate about 46% of the [CII] emission with the HI emission. However, we can assign only around 9% of the total [CII] emission to the cold neutral medium (CNM). We found that about 79% of the total molecular hydrogen mass is not traced by CO emission. On average, the fraction of CO-dark gas dominates the molecular gas mass budget. The fraction seems to depend on the evolutionary stage of the regions: it is highest in the region covering a super star cluster in NGC 4214, while it is lower in a more compact, more metal-rich region.
description: 13 pages, 6 figures, accepted for publication in A and A
A Telecare System for Use in Traditional Persian Medicine
Creators: name: Nafisi, Vahid Reza
name: Ghods, Roshanak
Publisher: name: arXiv
Year: 2023
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Persian Medicine (PM) uses wrist temperature/humidity and pulse to determine a person's health status and temperament. However, the diagnosis may depend on the physician's interpretation, hindering the combination of PM with modern medical methods. This study proposes a system for measuring pulse signals and temperament detection based on PM. The system uses recorded thermal distribution, a temperament questionnaire, and a customized pulse measurement device. The collected data can be sent to a physician via a telecare system for interpretation and prescription of medications. The system was clinically implemented for patient care, assessed the temperaments of 34 participants, and recorded thermal images of the wrist, back of the hand, and entire face. The study suggests that a customized device for measuring pulse waves and other criteria based on PM can be incorporated into a telemedicine system, reducing the dependency on PM specialists for diagnosis.
Effective description of generalized disformal theories
Creators: name: Takahashi, Kazufumi
name: Minamitsuji, Masato
name: Motohashi, Hayato
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Generalized disformal transformations enable us to construct the generalized disformal Horndeski theories, which form the most general class of ghost-free scalar-tensor theories to this date. We extend the effective field theory (EFT) of cosmological perturbations to incorporate these generalized disformal Horndeski theories. The main difference from the conventional EFT is that our extended EFT involves operators with higher spatial derivatives of the lapse function. Our EFT also accommodates the generalized disformal transformation of U-DHOST theories.
description: 16 pages
DNA-Au (111) Interactions and Transverse Charge Transport Properties for DNA-Based Electronic Devices
Creators: name: Demir, Busra
name: Mohammad, Hashem
name: Anantram, M. P.
name: Oren, Ersin Emre
Publisher: name: arXiv
Year: 2023
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: DNAs charge transfer and self-assembly characteristics have made it a hallmark of molecular electronics for the past two decades. A fast and efficient charge transfer mechanism with programmable properties using DNA nanostructures is required for DNA-based nanoelectronics applications and devices. The ability to integrate DNA with inorganic substrates becomes critical in this process. Such integrations may effect the conformation of DNA, altering the charge transport properties. Thus, using molecular dynamics simulations and first-principles calculations in conjunction with Greens function approach, we explore the impact of Au (111) substrate on the conformation of DNA and analyze its effect on the charge transport. Our results indicate that DNA sequence, leading its molecular conformation on Au substrate, is critical to engineer charge transport properties. We demonstrate that DNA can fluctuate on a gold substrate, sampling various distinct conformations over time. The energy levels, spatial locations of molecular orbitals and the DNA/Au contact atoms can differ between these distinct conformations. Depending on the sequence, at HOMO, the charge transmission differs up to 60 times between the top ten conformations. We demonstrate that the relative positions of the nucleobases are critical in determining the conformations and the coupling between orbitals. We anticipate these results can be extended to other inorganic surfaces and pave the way for understanding DNA inorganic interface interaction for future DNA-based electronic devices.
description: Main manuscript: 8 pages, 4 figures Supplementary Information: 13 pages, 9 figures
Anisotropic linear and non-linear excitonic optical properties of buckled monolayer semiconductors
Creators: name: Quintela, M. F. C. Martins
name: Pedersen, T. Garm
Publisher: name: arXiv
Year: 2023
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The optical properties of two-dimensional materials are exceptional in several respects. They are highly anisotropic and frequently dominated by excitonic effects. Dipole-allowed second order non-linear optical properties require broken inversion symmetry. Hence, several two-dimensional materials show strong in-plane (IP) non-linearity but negligible out-of-plane (OOP) response due to vertical symmetry. By considering buckled hexagonal monolayers, we analyze the critical role of broken vertical symmetry on their excitonic optical response. Both linear as well as second order shift current and second harmonic response are studied. We demonstrate that substantial OOP non-linear response can be obtained, in particular, through off-diagonal tensor elements coupling IP excitation to OOP response. Our findings are explained by excitonic selection rules for OOP response and the impact of dielectric screening on excitons is elucidated.
description: 20 pages, 8 figures
Clustering of Local Group distances: publication bias or correlated measurements? IV. The Galactic Center
Creators: name: de Grijs, Richard
name: Bono, Giuseppe
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Aiming at deriving a statistically well-justified Galactic Center distance, $R_0$, and reducing any occurrence of publication bias, we compiled the most comprehensive and most complete database of Galactic Center distances available to date, containing 273 new or revised $R_0$ estimates published since records began in October 1918 until June 2016. We separate our $R_0$ compilation into direct and indirect distance measurements. The latter include a large body of estimates that rely on centroid determinations for a range of tracer populations as well as measurements based on kinematic observations of objects at the solar circle, combined with a mass and/or rotational model of the Milky Way. Careful assessment of the Galactic Center distances resulting from orbital modeling and statistical parallax measurements in the Galactic nucleus yields our final Galactic Center distance recommendation of $R_0 = 8.3 \pm 0.2 \mbox{ (statistical)} \pm 0.4 \mbox{ (systematic)}$ kpc. The centroid-based distances are in good agreement with this recommendation. Neither the direct measurements nor the post-1990 centroid-based distance determinations suggest that publication bias may be important. The kinematics-based distance estimates are affected by significantly larger uncertainties, but they can be used to constrain the Galaxy's rotation velocity at the solar Galactocentric distance, $Θ_0$. Our results imply that the International Astronomical Union-recommended Galactic Center distance ($R_0^{\rm IAU} = 8.5$ kpc) needs a downward adjustment, while its $Θ_0$ recommendation ($Θ_0 = 220$ km s$^{-1}$) requires a substantial upward revision.
description: 16 pages, 4 figures; ApJS, in press; uses aastex6.cls
Well-posedness for moving interfaces in anisotropic plasmas
Creators: name: Trakhinin, Yuri
Publisher: name: arXiv
Year: 2023
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 76W05, 35L65, 35R35

description: We study the local-in-time well-posedness for an interface that separates an anisotropic plasma from a vacuum. The plasma flow is governed by the ideal Chew-Goldberger-Low (CGL) equations, which are the simplest collisionless fluid model with anisotropic pressure. The vacuum magnetic and electric fields are supposed to satisfy the pre-Maxwell equations. The plasma and vacuum magnetic fields are tangential to the interface. This represents a nonlinear hyperbolic-elliptic coupled problem with a characteristic free boundary. By a suitable symmetrization of the linearized CGL equations we reduce the linearized free boundary problem to a problem analogous to that in isotropic magnetohydrodynamics (MHD). This enables us to prove the local existence and uniqueness of solutions to the nonlinear free boundary problem under the same non-collinearity condition for the plasma and vacuum magnetic fields on the initial interface required by Secchi and Trakhinin (Nonlinearity 27:105-169, 2014) in isotropic MHD.
description: 10 pages
Spicy Analytics: Data Science for Life Science
Creators: name: Horváth, Bence
Publisher: name: Zenodo
Year: 2023
Subjects: life science, data sciene

description: Nowadays, one of the biggest challenges is to extract relevant information from large amount of data. To understand indications and map their interrelationships in the health, pharma, FMCG, marketing and IT industry complex algorithms are needed to identify individual customer groups, analyze area progressions, identify endpoints that occur, and create predictions. What is our solution good for?
 The analytical solution based on machine learning developed by Spicy Analytics Ltd. helps professionals in the following areas:
 o Based on descriptive future events can be predicted
 o Homogeneous product or consumersegments can be indetified
 o By recognizing the differences, communication and/or recommendation can be changed and strengthened.
 o The most important stages of a process become recognizable.
Accumulate and Jam: Towards Secure Communication via A Wireless-Powered Full-Duplex Jammer
Creators: name: Bi, Ying
name: Chen, He
Publisher: name: arXiv
Year: 2016
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: This paper develops a new cooperative jamming protocol, termed accumulate-and-jam (AnJ), to improve physical layer security in wireless communications. Specifically, a full-duplex (FD) friendly jammer is deployed to secure the direct communication between source and destination in the presence of a passive eavesdropper. We consider the friendly jammer as an energy-constrained node without embedded power supply but with an energy harvesting unit and rechargeable energy storage; it can thus harvest energy from the radio frequency (RF) signals transmitted by the source, accumulate the energy in its battery, and then use this energy to perform cooperative jamming. In the proposed AnJ protocol, based on the energy status of the jammer and the channel state of source-destination link, the system operates in either dedicated energy harvesting (DEH) or opportunistic energy harvesting (OEH) mode. Thanks to the FD capability, the jammer also harvests energy from the information-bearing signal that it overhears from the source. We study the complex energy accumulation and consumption procedure at the jammer by considering a practical finite-capacity energy storage, of which the long-term stationary distribution is characterized through applying a discrete-state Markov Chain. An alternative energy storage with infinite capacity is also studied to serve as an upper bound. We further derive closed-form expressions for two secrecy metrics, i.e., secrecy outage probability and probability of positive secrecy capacity. In addition, the impact of imperfect channel state information on the performance of our proposed protocol is also investigated. Numerical results validate all theoretical analyses and reveal the merits of the proposed AnJ protocol over its half-duplex counterpart.
description: Full version of a paper accepted to appear in IEEE Journal of Selected Topics in Signal Processing
The AGN fuelling/feedback cycle in nearby radio galaxies - V. The cold atomic gas of NGC 3100 and its group
Creators: name: Maccagni, F. M.
name: Ruffa, I.
name: Loni, A.
name: Prandoni, I.
name: Ragusa, R.
name: Kleiner, D.
name: Serra, P.
name: Iodice, E.
name: Spavone, M.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present Australia Compact Telescope Array (ATCA) 21-cm observations of the nearby low-excitation radio galaxy (LERG) NGC 3100. This is the brightest galaxy of a loose group and hosts a young ($\sim 2$ Myr) radio source. The ATCA observations reveal for the first time the presence of neutral hydrogen (HI) gas in absorption in the centre of this radio galaxy, and in emission in two low-mass galaxies of the group and in a diffuse dark cloud in the proximity of NGC 3100. The sensitivity to low-column density gas ($N_{\rm HI}\sim 10^{19}$ cm$^{-2}$) allows us to reveal asymmetries in the periphery of most the HI-detected galaxies, suggesting that tidal interactions may be on-going. The diffuse cloud does not show a stellar counterpart down to $27$ mag/arcsec$^2$ and could be the remnant of these interactions. The analysis of the HI absorption complex in NGC 3100 indicates that the atomic phase of the hydrogen is distributed as its molecular phase (observed at arcsecond resolution through several carbon monoxide emission lines). We suggest that the interactions occurring within the group are causing turbulent cold gas clouds in the intra-group medium to be slowly accreted towards the centre of NGC 3100. This caused the recent formation of the cold circum-nuclear disk which is likely sustaining the young nuclear activity.
description: 10 pages, 7 figures; submitted to Astronomy & Astrophysics
Existence and non-uniqueness of global weak solutions to inviscid primitive and Boussinesq equations
Creators: name: Chiodaroli, Elisabetta
name: Michálek, Martin
Publisher: name: arXiv
Year: 2016
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: We consider the initial value problem for the inviscid Primitive and Boussinesq equations in three spatial dimensions. We recast both systems as an abstract Euler-type system and apply the methods of convex integration of De Lellis and Székelyhidi to show the existence of infinitely many global weak solutions of the studied equations for general initial data. We also introduce an appropriate notion of dissipative solutions and show the existence of suitable initial data which generate infinitely many dissipative solutions.
Analysis Plan: Influence of percutaneous Vagus Nerve Stimulation (pVNS) on Learning in a Volatile Environment using Continuous-Valued States in the Water-Bucket-Task.
Creators: name: Wellstein, Katharina
name: Iglesias, Sandra
name: Hess, Alexander
name: Stephan, Klaas Enno
Publisher: name: Zenodo
Year: 2023

description: This analysis plan describes the procedures for the analysis of the effect of vagus nerve stimulation on learning of continuous-valued outcomes in a volatile environment.
On the equivalence of GPD representations
Creators: name: Müller, Dieter
name: Semenov-Tian-Shansky, Kirill
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Phenomenological representations of generalized parton distributions (GPDs) implementing the non-trivial field theoretical requirements are employed in the present day strategies for extracting of hadron structure information encoded in GPDs from the observables of hard exclusive reactions. Showing out the equivalence of various GPD representations can help to get more insight into GPD properties and allow to build up flexible GPD models capable of satisfactory description of the whole set of available experimental data. We review the mathematical aspects of establishing equivalence between the the double partial wave expansion of GPDs in the conformal partial waves and in the $t$-channel ${\rm SO}(3)$ partial waves and the double distribution representation of GPDs.
description: A contribution into the Proceedings of QUARKS-2016 19th International Seminar on High Energy Physics, Pushkin, Russia, 29 May - 4 June, 2016
Continuous spectrum for a class of smooth mixing Schrödinger operators
Creators: name: Fayad, Bassam
name: Qu, Yanhui
Publisher: name: arXiv
Year: 2016
Subjects: subject: Dynamical Systems (math.DS)
subject: Mathematical Physics (math-ph)
subject: Spectral Theory (math.SP)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We give the first example of a smooth volume preserving mixing dynamical system such that the discrete Schrödinger operators on the line defined with a potential generated by this system and a Hölder sampling function, have almost surely a continuous spectrum.
Grown-up stars physics with MATISSE
Creators: name: Millour, Florentin
name: Hron, J
name: Chiavassa, A
name: Weigelt, G
name: Soulain, A
name: Khorrami, Z
name: Meilland, A
name: Nardetto, N
name: Paladini, C
name: de Souza, A Domiciano
name: Niccolini, G
name: Hofmann, K. -H
name: Schertl, D
name: Stee, P
name: Bendjoya, P
name: Thévenin, F
name: Vakili, F
name: Berio, P
name: Lanz, T
name: Matter, A
name: Cruzalèbes, P
name: Petrov, R
name: Lopez, B
Publisher: name: arXiv
Year: 2016
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: MATISSE represents a great opportunity to image the environment around massive and evolved stars. This will allow one to put constraints on the circumstellar structure, on the mass ejection of dust and its reorganization , and on the dust-nature and formation processes. MATISSE measurements will often be pivotal for the understanding of large multiwavelength datasets on the same targets collected through many high-angular resolution facilities at ESO like sub-millimeter interferometry (ALMA), near-infrared adaptive optics (NACO, SPHERE), interferometry (PIONIER, GRAVITY), spectroscopy (CRIRES), and mid-infrared imaging (VISIR). Among main sequence and evolved stars, several cases of interest have been identified that we describe in this paper.
description: SPIE, Jun 2016, Edimbourgh, France
Weaving knotted vector fields with tunable helicity
Creators: name: Kedia, Hridesh
name: Foster, David
name: Dennis, Mark R.
name: Irvine, William T. M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Fluid Dynamics (physics.flu-dyn)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: We present a general construction of divergence-free knotted vector fields from complex scalar fields, whose closed field lines encode many kinds of knots and links, including torus knots, their cables, the figure-8 knot and its generalizations. As finite-energy physical fields they represent initial states for fields such as the magnetic field in a plasma, or the vorticity field in a fluid. We give a systematic procedure for calculating the vector potential, starting from complex scalar functions with knotted zero filaments, thus enabling an explicit computation of the helicity of these knotted fields. The construction can be used to generate isolated knotted flux tubes, filled by knots encoded in the lines of the vector field. Lastly we give examples of manifestly knotted vector fields with vanishing helicity. Our results provide building blocks for analytical models and simulations alike.
description: 6 pages, 4 figures
Constrained hyperbolic divergence cleaning in smoothed particle magnetohydrodynamics with variable cleaning speeds
Creators: name: Tricco, Terrence S.
name: Price, Daniel J.
name: Bate, Matthew R.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present an updated constrained hyperbolic/parabolic divergence cleaning algorithm for smoothed particle magnetohydrodynamics (SPMHD) that remains conservative with wave cleaning speeds which vary in space and time. This is accomplished by evolving the quantity $ψ/ c_h$ instead of $ψ$. Doing so allows each particle to carry an individual wave cleaning speed, $c_h$, that can evolve in time without needing an explicit prescription for how it should evolve, preventing circumstances which we demonstrate could lead to runaway energy growth related to variable wave cleaning speeds. This modification requires only a minor adjustment to the cleaning equations and is trivial to adopt in existing codes. Finally, we demonstrate that our constrained hyperbolic/parabolic divergence cleaning algorithm, run for a large number of iterations, can reduce the divergence of the field to an arbitrarily small value, achieving $\nabla \cdot B=0$ to machine precision.
description: 23 pages, 16 figures, accepted for publication in Journal of Computational Physics