cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The EDIBLES survey VI. Searching for time variations of interstellar absorption features
Creators: name: Farhang, Amin
name: Smoker, Jonathan
name: Cox, Nick L. J.
name: Cami, Jan
name: Linnartz, Harold
name: van Loon, Jacco Th.
name: Cordiner, Martin A.
name: Sarre, Peter J.
name: Khosroshahi, Habib G.
name: Ehrenfreund, Pascale
name: Foing, Bernard H.
name: Kaper, Lex
name: Laverick, Mike
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Interstellar lines observed toward stellar targets change slowly over long timescales, mainly due to the proper motion of the background target relative to the intervening clouds. On longer timescales, the cloud's slowly changing physical and chemical conditions can also cause variation. We searched for systematic variations in the absorption profiles of the diffuse interstellar bands (DIBs) and interstellar atomic and molecular lines by comparing the high-quality data set from the ESO diffuse interstellar bands extensive exploration survey (EDIBLES) to older archival observations, bridging typical timescales of 10 years with a maximum timescale of 22 years. We found good archival observations for 64 EDIBLES targets. Our analysis focused on 31 DIBs, 7 atomic, and 5 molecular lines. We considered various systematic effects and applied a robust Bayesian test to establish which absorption features could display significant variations. While systematic effects greatly complicate our search, we find evidence for variations in the profiles of the $λλ$4727 and 5780 DIBs in a few sightlines. Toward HD~167264, we find a new \ion{Ca}{i} cloud component that appears and becomes stronger after 2008. The same sightline furthermore displays marginal but systematic changes in the column densities of the atomic lines originating from the leading cloud component in the sightline. Similar variations are seen toward HD~147933. Our high-quality spectroscopic observations and archival data show that it is possible to probe interstellar time variations on time scales of typically a decade. Even though systematic uncertainties, as well as the generally somewhat lower quality of older data, complicate matters, we can conclude that time variations can be made visible, both in atomic lines and DIB profiles for a few targets, but that generally, these features are stable along many lines of sight.
description: 180 pages, 138 figures, accepted for publication in A&A journal
Potential Local And Systemic effects of microplasTICS upon ingestion - PLASTICS)
Creators: name: Steeg, E.vande
Publisher: name: Zenodo
Year: 2020
Subjects: microplastics, intestinal absorption, InTESTine, toxicology, in vitro

description: Microplastics are a new type of environmental pollutant and are very prevalent in our environment. Microplastics may affect human health through multiple routes e.g. by the food chain or by inhalation. It is unclear as to what extent human exposure to environmental small plastic particles of varying shape, size and composition is a health threat. As microplastics are easily ingested, the intestinal mucosa is continuously being exposed to the microplastics. Our projects aims to determine the potential hazard of consuming small plastic particles of varying shape, size and composition by studying the potential systemic exposure of these small plastic particles by determining intestinal absorption and transport. A subset of microplastics will be exposed to the physiologically relevant InTESTine system and intestinal absorption will be determined as well as toxicologic parameters will be measured by studying the viability and integrity as well as the local inflammatory responses.
Inferring the presence of very massive stars in local star-forming regions
Creators: name: Martins, Fabrice
name: Schaerer, Daniel
name: Marques-Chaves, Rui
name: Upadhyaya, Ankur
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present a study aiming at detecting VMS in local star-forming region from the imprint they leave on the integrated UV and optical light. We analyzed a sample of 27 star-forming regions and galaxies in the local Universe. We selected sources with a metallicity close to that of the LMC. We defined empirical criteria to distinguish sources dominated by VMS and Wolf-Rayet stars (WR), using template spectra of VMS- and WR-dominated regions. We subsequently built population synthesis models with an updated treatment of VMS. We show that the UV range alone is not sufficient to distinguish between VMS- and WR-dominated sources. The region of the WR bumps in the optical breaks the degeneracy. In particular, the morphology of the blue bump at 4640-4686 A is a key diagnostic. Beyond the prototypical R136 region we identify two galaxies showing clear signatures of VMS. In two other galaxies or regions the presence of VMS can be suspected, as already discussed in the literature. The stellar population is clearly dominated by WR stars in seven other sources. The most recent BPASS population synthesis models can neither account for the strong HeII 1640 emission, nor for the shape of the blue bump in VMS- and WR-dominated sources. Our models that include VMS more realistically reproduce the UV-optical spectra of VMS-dominated sources. We conclude that VMS are present in some local star-forming regions, but that separating them from WR-dominated populations requires optical spectroscopy with a high signal-to-noise ratio. A high equivalent width of HeII 1640 is not a sufficient condition for identifying VMS. Populations synthesis models need to take VMS into account by incorporating not only evolutionary tracks, but also dedicated spectral libraries. Finally, we stress that the treatment of WR stars needs to be improved as well.
description: 16 pages, 10 figures + appendix. Accepted in Astronomy and Astrophysics
Initialization of hydrodynamics in relativistic heavy ion collisions with an energy-momentum transport model
Creators: name: Naboka, V. Yu.
name: Akkelin, S. V.
name: Karpenko, Iu. A.
name: Sinyukov, Yu. M.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: A key ingredient of hydrodynamical modeling of relativistic heavy ion collisions is thermal initial conditions, an input that is the consequence of a pre-thermal dynamics which is not completely understood yet. In the paper we employ a recently developed energy-momentum transport model of the pre-thermal stage to study influence of the alternative initial states in nucleus-nucleus collisions on flow and energy density distributions of the matter at the starting time of hydrodynamics. In particular, the dependence of the results on isotropic and anisotropic initial states is analyzed. It is found that at the thermalization time the transverse flow is larger and the maximal energy density is higher for the longitudinally squeezed initial momentum distributions. The results are also sensitive to the relaxation time parameter, equation of state at the thermalization time, and transverse profile of initial energy density distribution: Gaussian approximation, Glauber Monte Carlo profiles, etc. Also, test results ensure that the numerical code based on the energy-momentum transport model is capable of providing both averaged and fluctuating initial conditions for the hydrodynamic simulations of relativistic nuclear collisions.
description: 29 pages, 15 figures, minor changes, to be published in Phys. Rev. C
3D Adversarial Augmentations for Robust Out-of-Domain Predictions
Creators: name: Lehner, Alexander
name: Gasperini, Stefano
name: Marcos-Ramiro, Alvaro
name: Schmidt, Michael
name: Navab, Nassir
name: Busam, Benjamin
name: Tombari, Federico
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: Since real-world training datasets cannot properly sample the long tail of the underlying data distribution, corner cases and rare out-of-domain samples can severely hinder the performance of state-of-the-art models. This problem becomes even more severe for dense tasks, such as 3D semantic segmentation, where points of non-standard objects can be confidently associated to the wrong class. In this work, we focus on improving the generalization to out-of-domain data. We achieve this by augmenting the training set with adversarial examples. First, we learn a set of vectors that deform the objects in an adversarial fashion. To prevent the adversarial examples from being too far from the existing data distribution, we preserve their plausibility through a series of constraints, ensuring sensor-awareness and shapes smoothness. Then, we perform adversarial augmentation by applying the learned sample-independent vectors to the available objects when training a model. We conduct extensive experiments across a variety of scenarios on data from KITTI, Waymo, and CrashD for 3D object detection, and on data from SemanticKITTI, Waymo, and nuScenes for 3D semantic segmentation. Despite training on a standard single dataset, our approach substantially improves the robustness and generalization of both 3D object detection and 3D semantic segmentation methods to out-of-domain data.
description: 37 pages, 12 figures
Second generation stationary digital breast tomosynthesis system with faster scan time and wider angular span
Creators: name: Zhou, O.
name: Jafari, H.
name: Gao, B.
name: Wu, G.
name: Spronk, D.
name: Laganis, P.E.
name: Olson, K.
name: Calliste, J.
name: Lee, Y.Z.
name: Lu, J.
Publisher: name: John Wiley and Sons Ltd
Year: 2017

description: Purpose: The aim of this study was to characterize a new generation stationary digital breast tomosynthesis system with higher tube flux and increased angular span over a first generation system. Methods: The linear CNT x-ray source was designed, built, and evaluated to determine its performance parameters. The second generation system was then constructed using the CNT x-ray source and a Hologic gantry. Upon construction, test objects and phantoms were used to characterize system resolution as measured by the modulation transfer function (MTF), and artifact spread function (ASF). Results: The results indicated that the linear CNT x-ray source was capable of stable operation at a tube potential of 49 kVp, and measured focal spot sizes showed source-to-source consistency with a nominal focal spot size of 1.1 mm. After construction, the second generation (Gen 2) system exhibited entrance surface air kerma rates two times greater the previous s-DBT system. System in-plane resolution as measured by the MTF is 7.7 cycles/mm, compared to 6.7 cycles/mm for the Gen 1 system. As expected, an increase in the z-axis depth resolution was observed, with a decrease in the ASF from 4.30 mm to 2.35 mm moving from the Gen 1 system to the Gen 2 system as result of an increased angular span. Conclusions: The results indicate that the Gen 2 stationary digital breast tomosynthesis system, which has a larger angular span, increased entrance surface air kerma, and faster image acquisition time over the Gen 1 s-DBT system, results in higher resolution images. With the detector operating at full resolution, the Gen 2 s-DBT system can achieve an in-plane resolution of 7.7 cycles per mm, which is better than the current commercial DBT systems today, and may potentially result in better patient diagnosis.
The LOFAR Two-Metre Sky Survey (LoTSS): VI. Optical identifications for the second data release
Creators: name: Hardcastle, M. J.
name: Horton, M. A.
name: Williams, W. L.
name: Duncan, K. J.
name: Alegre, L.
name: Barkus, B.
name: Croston, J. H.
name: Dickinson, H.
name: Osinga, E.
name: Röttgering, H. J. A.
name: Sabater, J.
name: Shimwell, T. W.
name: Smith, D. J. B.
name: Best, P. N.
name: Botteon, A.
name: Brüggen, M.
name: Drabent, A.
name: de Gasperin, F.
name: Gürkan, G.
name: Hajduk, M.
name: Hale, C. L.
name: Hoeft, M.
name: Jamrozy, M.
name: Kunert-Bajraszewska, M.
name: Kondapally, R.
name: Magliocchetti, M.
name: Mahatma, V. H.
name: Mostert, R. I. J.
name: O'Sullivan, S. P.
name: Pajdosz-Śmierciak, U.
name: Petley, J.
name: Pierce, J. C. S.
name: Prandoni, I.
name: Schwarz, D. J.
name: Shulewski, A.
name: Siewert, T. M.
name: Stott, J. P.
name: Tang, H.
name: Vaccari, M.
name: Zheng, X.
name: Bailey, T.
name: Desbled, S.
name: Goyal, A.
name: Gonano, V.
name: Hanset, M.
name: Kurtz, W.
name: Lim, S. M.
name: Mielle, L.
name: Molloy, C. S.
name: Roth, R.
name: Terentev, I. A.
name: Torres, M.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The second data release of the LOFAR Two-Metre Sky Survey (LoTSS) covers 27% of the northern sky, with a total area of $\sim 5,700$ deg$^2$. The high angular resolution of LOFAR with Dutch baselines (6 arcsec) allows us to carry out optical identifications of a large fraction of the detected radio sources without further radio followup; however, the process is made more challenging by the many extended radio sources found in LOFAR images as a result of its excellent sensitivity to extended structure. In this paper we present source associations and identifications for sources in the second data release based on optical and near-infrared data, using a combination of a likelihood-ratio cross-match method developed for our first data release, our citizen science project Radio Galaxy Zoo: LOFAR, and new approaches to algorithmic optical identification, together with extensive visual inspection by astronomers. We also present spectroscopic or photometric redshifts for a large fraction of the optical identifications. In total 4,116,934 radio sources lie in the area with good optical data, of which 85% have an optical or infrared identification and 58% have a good redshift estimate. We demonstrate the quality of the dataset by comparing it with earlier optically identified radio surveys. This is by far the largest ever optically identified radio catalogue, and will permit robust statistical studies of star-forming and radio-loud active galaxies.
description: 29 pages. Accepted by A&A; data products available at https://lofar-surveys.org/dr2_release.html
La suggestione del doppio. Sinesio di Cirene e il fantomatico Evagrio
Creators: name: Monticini, Francesco
Publisher: name: Parekbolai. An Electronic Journal for Byzantine Literature
Year: 2020
Subjects: Synesius of Cyrene; John Moschus; dreams

description: This article deals with a legend reported by the Byzantine monk John Moschus (6th-7th century) in The Spiritual Meadow. It features the Christian bishop Synesius of Cyrene and a pagan philosopher called Evagrius. By comparing this text with Synesius’ authentic biography – as it emerges from his own letters and works –, the author tries to seize the origin of the legend. As a conclusion, he argues that it was probably composed in order to conciliate some apparently conflicting features of the personality of Synesius – who was simultaneously a pagan Neoplatonic philosopher and a Christian bishop – at a time when such a complexity was no longer understood and accepted.
description: Parekbolai. An Electronic Journal for Byzantine Literature, Vol 10 (2020)
Ένα ανέκδοτο ποίημα του Νικηφόρου Καλλίστου Ξανθοπούλου στον Ευαγγελισμό της Θεοτόκου και στον Ακάθιστο Ύμνο
Creators: name: Paraskevopoulou, Iliana
Publisher: name: Parekbolai. An Electronic Journal for Byzantine Literature
Year: 2020
Subjects: Nikephoros Xanthopoulos, Theotokos, Annunciation, poem, metrical prefaces

description: The article focuses on an unedited poem of the well-known writer Nikephoros Kallistos Xanthopoulos dedicated to Theotokos’ Annunciation feast. The poem preserved in codices Bodl. Auct. E.5.14 and Neapol. II.A.25, both dated in the XIV century. It consists of 190 dodecasyllabic verses and belongs to a group of poems, known as “metrical prefaces”, which served as introductions to homilies of various kinds.
description: Parekbolai. An Electronic Journal for Byzantine Literature, Vol 10 (2020)
Redundant basis interpretation of Doi-Peliti method and an application
Creators: name: Takahashi, Shunta
name: Ohkubo, Jun
Publisher: name: arXiv
Year: 2023
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The Doi-Peliti method is effective for investigating classical stochastic processes, and it has wide applications, including field theoretic approaches. Furthermore, it is applicable not only to master equations but also to stochastic differential equations; one can derive a kind of discrete process from stochastic differential equations. A remarkable fact is that the Doi-Peliti method is related to a different analytical approach, i.e., generating function. The connection with the generating function approach helps to understand the derivation of discrete processes from stochastic differential equations. Here, a redundant basis interpretation for the Doi-Peliti method is proposed, which enables us to derive different types of discrete processes. The conventional correspondence with the generating function approach is also extended. The proposed extensions give us a new tool to study stochastic differential equations. As an application of the proposed interpretation, we perform numerical experiments for a finite-state approximation of the derived discrete process from the noisy van der Pol system; the redundant basis yields reasonable results compared with the conventional discrete process with the same number of states.
description: 21 pages, 2 figures
Estimating scatter from sparsely measured primary signal
Creators: name: Lee, Y.Z.
name: Shan, J.
name: Wu, G.
name: Calliste, J.
name: Inscoe, C.R.
name: Zhou, O.
name: Lu, J.
Publisher: name: SPIE
Year: 2017

description: Scatter radiation severely degrades the image quality. Measurement-based scatter correction methods sample the scatter signal at sparsely distributed points, from which the scatter profile is estimated and deterministically removed from the projection image. The estimation of the scatter profile is generally done through a spline interpolation and the resulting scatter profile is quite smooth. Consequently, the noise is intact and the signal-to-noise ratio is reduced in the projection image after scatter correction, leading to image artifacts and increased noise in the reconstruction images. We propose a simple and effective method, referred to as filtered scatter-to-primary ratio (f -SPR) estimation, to estimate the scatter profile using the sparsely sampled scatter signal. Using the primary sampling device and the stationary digital tomosynthesis systems previously developed in our lab, we evaluated and compared the f-SPR method in comparison with existing methods in terms of contrast ratio, signal difference-to-noise ratio, and modulation transfer function. A significant improvement in image quality is observed in both the projection and the reconstruction images using the proposed method.
Generalized Born--Infeld Actions and Projective Cubic Curves
Creators: name: Ferrara, S.
name: Porrati, M.
name: Sagnotti, A.
name: Stora, R.
name: Yeranyan, A.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We investigate $U(1)^{\,n}$ supersymmetric Born-Infeld Lagrangians with a second non-linearly realized supersymmetry. The resulting non-linear structure is more complex than the square root present in the standard Born-Infeld action, and nonetheless the quadratic constraints determining these models can be solved exactly in all cases containing three vector multiplets. The corresponding models are classified by cubic holomorphic prepotentials. Their symmetry structures are associated to projective cubic varieties.
description: 17 pages, LaTeX, 1 eps figure. Comments added and misprints corrected. Final version to appear in Fortschritte der Physik - Progress of Physics
A new material for probing spin-orbit coupling in Iridates
Creators: name: Phelan, Brendan F.
name: Krizan, Jason
name: Xie, Weiwei
name: Gibson, Quinn
name: Cava, R. J.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We report the structure and magnetic properties of a new iridate compound, SrxLa11-xIr4O24, where the d-electron count of Ir and therefore its number of unpaired electrons can be tuned continuously from 5d5 Ir4+ to 5d4 Ir5+, i.e. from SrLa10Ir4O24 to Sr5La6Ir4O24. The IrO6 octahedra in SrxLa11-xIr4O24 are isolated from each other and from other transition elements, minimizing band effects, and the doping is on the framework sites, not the Ir sites, minimizing the effects of disorder. Measurements of the temperature dependent magnetic susceptibility are employed to determine the evolution of the Ir magnetic moment on progressing from 5d5 Ir4+ to 5d4 Ir5+, and are clearly best described by a transition from a J=1/2 to a J=0 Ir magnetic state; that is, the evolution of the magnetic susceptibility shows the dominance of spin-orbit coupling in determining the magnetic properties of a material with highly isolated IrO6 octahedra.
description: Accepted Physical Review
... Nun aber ist Christus von den Toten auferweckt worden, als Erster der Entschlafenen (1 Kor 15,20)
Creators: name: Gubler, Marie-Louise
Publisher: name: Diakonia
Year: 1970

description: Diakonia, Bd. 22 Nr. 1 (1991): Diakonia, Band 22, Heft 1
The space weather around the exoplanet GJ 436 b. II. Stellar wind-exoplanet interactions
Creators: name: Vidotto, A. A.
name: Bourrier, V.
name: Fares, R.
name: Bellotti, S.
name: Donati, J. F.
name: Petit, P.
name: Hussain, G. A. J.
name: Morin, J.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: The M dwarf star GJ 436 hosts a warm-Neptune that is losing substantial amount of atmosphere, which is then shaped by the interactions with the wind of the host star. The stellar wind is formed by particles and magnetic fields that shape the exo-space weather around the exoplanet GJ 436 b. Here, we use the recently published magnetic map of GJ 436 to model its 3D Alfvén-wave driven wind. By comparing our results with previous transmission spectroscopic models and measurements of non-thermal velocities at the transition region of GJ 436, our models indicate that the wind of GJ 436 is powered by a smaller flux of Alfvén waves than that powering the wind of the Sun. This suggests that the canonical flux of Alfvén waves assumed in solar wind models might not be applicable to the winds of old M dwarf stars. Compared to the solar wind, GJ 436's wind has a weaker acceleration and an extended sub-Alfvénic region. This is important because it places the orbit of GJ 436 b inside the region dominated by the stellar magnetic field (i.e., inside the Alfvén surface). Due to the sub-Alfvénic motion of the planet through the stellar wind, magnetohydrodynamic waves and particles released in reconnection events can travel along the magnetic field lines towards the star, which could power the anomalous ultraviolet flare distribution recently observed in the system. For an assumed planetary magnetic field of $B_p \simeq 2$ G, we derive the power released by stellar wind-planet interactions as $\mathcal{P} \sim 10^{22}$ -- $10^{23}$ erg s$^{-1}$, which is consistent with the upper limit of $10^{26}$ erg s$^{-1}$ derived from ultraviolet lines. We further highlight that, because star-planet interactions depend on stellar wind properties, observations that probe these interactions and the magnetic map used in 3D stellar wind simulations should be contemporaneous for deriving realistic results.
description: 12 pages, 7 figures, 1 table; accepted for publication in A&A
Die Einheit des Glaubens und die Vielheit der Theologien
Creators: name: Bouyer, Louis
Publisher: name: Internationale katholische Zeitschrift Communio
Year: 2022

description: Internationale katholische Zeitschrift Communio, Bd. 1 Nr. 2 (1972): Internationale katholische Zeitschrift Communio, Band 1, Heft 2
Compact tunable Compton x-ray source from laser-plasma accelerator and plasma mirror
Creators: name: Tsai, Hai-En
name: Wang, Xiaoming
name: Shaw, Joseph
name: Li, Zhengyan
name: Arefiev, Alexey V.
name: Zhang, Xi
name: Zgadzaj, Rafal
name: Henderson, Watson
name: Khudik, V.
name: Shvets, G.
name: Downer, M. C.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We present an in-depth experimental-computational study of the parameters necessary to optimize a tunable, quasi-monoenergetic, efficient, low-background Compton backscattering (CBS) x-ray source that is based on the self-aligned combination of a laser-plasma accelerator (LPA) and a plasma mirror (PM). The main findings are: (1) an LPA driven in the blowout regime by 30 TW, 30 fs laser pulses producesnot only a high-quality, tunable, quasi-monoenergetic electron beam, but also a high-quality, relativistically intense (a0~1) spent drive pulse that remains stable in profile and intensity over the LPA tuning range. (2) A thin plastic film near the gas jet exit retro-reflects the spent drive pulse efficiently into oncoming electrons to produce CBS x-rays without detectable bremsstrahlung background. Meanwhile anomalous far-field divergence of the retro-reflected light demonstrates relativistic "denting" of the PM. Exploiting these optimized LPA and PM conditions, we demonstrate quasi-monoenergetic (50% FWHM energy spread), tunable (75 to 200 KeV) CBS x-rays, characteristics previously achieved only on more powerful laser systems by CBS of a split-off, counter-propagating pulse. Moreover, laser-to-x-ray photon conversion efficiency ~6e12 exceeds that of any previous LPA-based quasi-monoenergetic Compton source. Particle-in-cell simulations agree well with the measurements.
description: 10 pages, 7 figures
The miniJPAS survey quasar selection IV: Classification and redshift estimation with SQUEzE
Creators: name: Pérez-Ràfols, Ignasi
name: Abramo, L. Raul
name: Martínez-Solaeche, Ginés
name: Pieri, Matthew M.
name: Queiroz, Carolina
name: Rodrigues, Natália V. N.
name: Bonoli, Silvia
name: Chaves-Montero, Jonás
name: Morrison, Sean S.
name: Alcaniz, Jailson
name: Benitez, Narciso
name: Carneiro, Saulo
name: Cenarro, Javier
name: Cristóbal-Hornillos, David
name: Dupke, Renato
name: Ederoclite, Alessandro
name: Delgado, Rosa M. González
name: Hernán-Caballero, Antonio
name: López-Sanjuan, Carlos
name: Marín-Franch, Antonio
name: Marra, Valerio
name: de Oliveira, Claudia Mendes
name: Moles, Mariano
name: Sodré, Laerte
name: Taylor, Keith
name: Varela, Jesús
name: Ramió, Héctor Vázquez
Publisher: name: arXiv
Year: 2023
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present a list of quasar candidates including photometric redshift estimates from the miniJPAS Data Release constructed using SQUEzE. This work is based on machine-learning classification of photometric data of quasar candidates using SQUEzE. It has the advantage that its classification procedure can be explained to some extent, making it less of a `black box' when compared with other classifiers. Another key advantage is that using user-defined metrics means the user has more control over the classification. While SQUEzE was designed for spectroscopic data, here we adapt it for multi-band photometric data, i.e. we treat multiple narrow-band filters as very low-resolution spectra. We train our models using specialized mocks from Queiroz et al. (2022). We estimate our redshift precision using the normalized median absolute deviation, $σ_{\rm NMAD}$ applied to our test sample. Our test sample returns an $f_1$ score (effectively the purity and completeness) of 0.49 for quasars down to magnitude $r=24.3$ with $z\geq2.1$ and 0.24 for quasars with $z<2.1$. For high-z quasars, this goes up to 0.9 for $r<21.0$. We present two catalogues of quasar candidates including redshift estimates: 301 from point-like sources and 1049 when also including extended sources. We discuss the impact of including extended sources in our predictions (they are not included in the mocks), as well as the impact of changing the noise model of the mocks. We also give an explanation of SQUEzE reasoning. Our estimates for the redshift precision using the test sample indicate a $σ_{NMAD}=0.92\%$ for the entire sample, reduced to 0.81\% for $r<22.5$ and 0.74\% for $r<21.3$. Spectroscopic follow-up of the candidates is required in order to confirm the validity of our findings.
description: Accepted in A&A 24 pages, 24 figures, 7 tables
Mutually Testing Processes
Creators: name: Bernardi, Giovanni
name: Hennessy, Matthew
Publisher: name: arXiv
Year: 2015
Subjects: subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences

description: In the standard testing theory of DeNicola-Hennessy one process is considered to be a refinement of another if every test guaranteed by the former is also guaranteed by the latter. In the domain of web services this has been recast, with processes viewed as servers and tests as clients. In this way the standard refinement preorder between servers is determined by their ability to satisfy clients. But in this setting there is also a natural refinement preorder between clients, determined by their ability to be satisfied by servers. In more general settings where there is no distinction between clients and servers, but all processes are peers, there is a further refinement preorder based on the mutual satisfaction of peers. We give a uniform account of these three preorders. In particular we give two characterisations. The first is behavioural, in terms of traces and ready sets. The second, for finite processes, is equational.
Die alten Glaubensbekenntnisse und die neuen Kurzformeln
Creators: name: Beinert, Wolfgang
Publisher: name: Internationale katholische Zeitschrift Communio
Year: 2022

description: Internationale katholische Zeitschrift Communio, Bd. 1 Nr. 2 (1972): Internationale katholische Zeitschrift Communio, Band 1, Heft 2
ЧАСТОТНЫЕ ОСОБЕННОСТИ СТРУКТУР МАГНИТНЫХ ОБЛАКОВ СОЛНЕЧНОГО ВЕТРА
Creators: name: Бархатова, О.М.
name: Бархатов, Н.А.
name: Воробьев, В.Г.
name: Ревунов, С.Е.
name: Долгова, Д.С.
Publisher: name: Кольский научный центр Российской академии наук
Year: 2019

description: В предлагаемой работе исследован УНЧ спектральный состав оболочек и переднего края тел магнитных облаков солнечного ветра различной протяженности для 33 событий. Анализ спектральной динамики модуля межпланетного магнитного поля, скорости и концентрации солнечного ветра позволил установить границы оболочек облаков и отметить области перехода к телу облака. Во всех случаях при переходе от оболочки к телу облака отмечается резкое ослабление интенсивности возмущений для всех анализируемых параметров.Характерный диапазон регистрируемых в оболочках облаков периодов УНЧ возмущений составляет от 15 до 25 минут в низкочастотной части спектра и порядка 5 минут для высокочастотной части. В телах изучаемых магнитных облаков кроме низкочастотных колебаний с периодами порядка 15-25 минут, регистрируются и высокочастотные возмущения, но в более широком диапазоне (2,5 -10 минут).
Kränze für Leni Gruyten (Rezension: Böll, Heinrich: Gruppenbild mit Dame)
Creators: name: Greiner, Franz
Publisher: name: Internationale katholische Zeitschrift Communio
Year: 2022

description: Internationale katholische Zeitschrift Communio, Bd. 1 Nr. 1 (1972): Internationale katholische Zeitschrift Communio, Band 1, Heft 1
Interior tomographic imaging of mouse heart in a carbon nanotube micro-CT
Creators: name: Lu, J.P.
name: Gong, H.
name: Kan, L.
name: Zhou, O.
name: Liu, R.
name: He, J.-Q.
name: Yu, H.
name: Cao, G.
Publisher: name: IOS Press
Year: 2016

description: BACKGROUND: The relatively high radiation dose from micro-CT is a cause for concern in preclinical research involving animal subjects. Interior region-of-interest (ROI) imaging was proposed for dose reduction, but has not been experimentally applied in micro-CT. OBJECTIVE: Our aim is to implement interior ROI imaging in a carbon nanotube (CNT) x-ray source based micro-CT, and present the ROI image quality and radiation dose reduction for interior cardiac micro-CT imaging of a mouse heart in situ. METHODS: An aperture collimator was mounted at the source-side to induce a small-sized cone beam (10 mm width) at the isocenter. Interior in situ micro-CT scans were conducted on a mouse carcass and several micro-CT phantoms. A GPU-accelerated hybrid iterative reconstruction algorithm was employed for volumetric image reconstruction. Radiation dose was measured for the same system operated at the interior and global micro-CT modes. RESULTS: Visual inspection demonstrated comparable image quality between two scan modes. Quantitative evaluation demonstrated high structural similarity index (up to 0.9614) with improved contrast-noise-ratio (CNR) on interior micro-CT mode. Interior micro-CT mode yielded significant reduction (up to 83.9) for dose length product (DLP). CONCLUSIONS: This work demonstrates the applicability of using CNT x-ray source based interior micro-CT for preclinical imaging with significantly reduced radiation dose.
Intensity contrast of solar network and faculae close to the solar limb, observed from two vantage points
Creators: name: Albert, K.
name: Krivova, N. A.
name: Hirzberger, J.
name: Solanki, S. K.
name: Vacas, A. Moreno
name: Suárez, D. Orozco
name: Jorge, N. Albelo
name: Appourchaux, T.
name: Alvarez-Herrero, A.
name: Rodríguez, J. Blanco
name: Gandorfer, A.
name: Gutierrez-Marques, P.
name: Kahil, F.
name: Kolleck, M.
name: Volkmer, R.
name: Iniesta, J. C. del Toro
name: Woch, J.
name: Fiethe, B.
name: Pérez-Grande, I.
name: Kilders, E. Sanchis
name: Jiménez, M. Balaguer
name: Rubio, L. R. Bellot
name: Calchetti, D.
name: Carmona, M.
name: Feller, A.
name: Fernandez-Rico, G.
name: Fernández-Medina, A.
name: Parejo, P. García
name: Blesa, J. L. Gasent
name: Gizon, L.
name: Grauf, B.
name: Heerlein, K.
name: Korpi-Lagg, A.
name: Lange, T.
name: Jiménez, A. López
name: Maue, T.
name: Meller, R.
name: Müller, R.
name: Nakai, E.
name: Schmidt, W.
name: Schou, J.
name: Sinjan, J.
name: Staub, J.
name: Strecker, H.
name: Torralbo, I.
name: Valori, G.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The brightness of faculae and network depends on the angle at which they are observed and the magnetic flux density. Close to the limb, assessment of this relationship has until now been hindered by the increasingly lower signal in magnetograms. This preliminary study aims at highlighting the potential of using simultaneous observations from different vantage points to better determine the properties of faculae close to the limb. We use data from the Solar Orbiter/Polarimetric and Helioseismic Imager (SO/PHI), and the Solar Dynamics Observatory/Helioseismic and Magnetic Imager (SDO/HMI), recorded at $\sim60^\circ$ angular separation of their lines of sight at the Sun. We use continuum intensity observed close to the limb by SO/PHI and complement it with the co-observed $B_{\rm LOS}$ from SDO/HMI, originating closer to disc centre (as seen by SDO/HMI), thus avoiding the degradation of the magnetic field signal near the limb. We derived the dependence of facular brightness in the continuum on disc position and magnetic flux density from the combined observations of SO/PHI and SDO/HMI. Compared with a single point of view, we were able to obtain contrast values reaching closer to the limb and to lower field strengths. We find the general dependence of the limb distance at which the contrast is maximum on the flux density to be at large in line with single viewpoint observations, in that the higher the flux density is, the closer the turning point lies to the limb. There is a tendency, however, for the maximum to be reached closer to the limb when determined from two vantage points. We note that due to the preliminary nature of this study, these results must be taken with caution. Our analysis shows that studies involving two viewpoints can significantly improve the detection of faculae near the solar limb and the determination of their brightness contrast relative to the quiet Sun.
ИЗУЧЕНИЕ ЭВОЛЮЦИИ ДОЛГОЖИВУЩЕЙ КОРОНАЛЬНОЙ ДЫРЫ В СЕВЕРНОМ ПОЛУШАРИИ В СОЛНЕЧНЫЙ МИНИМУМ ЗА 2015-2017 г.
Creators: name: Борисенко, А.В.
Publisher: name: Кольский научный центр Российской академии наук
Year: 2019

description: Систематическое изучение корональных дыр началось в конце 1970-х годов с согласованной научной программы наблюдений орбитальной обсерваторииSkyLabи наземных наблюдений в инфракрасной линии HeI10830A(обсерватория Китт-Пик, США).Впервые в Советском Союзе начали изучать корональные дыры в Лаборатории физики Солнца Крымской астрофизической обсерватории с конца 80-х годов под руководством Н.Н. Степанян по спектргелиограммамHeI10830Aполученными на универсальном спектрофотометре телескопа БСТ-2.Анализ наблюдений, полученных по данным спутника ACE/SWEPAM, показал, что на “спокойном” Солнце корональные дыры являются единственными источниками быстрого солнечного ветра (>450 км/с за период 2015-2017 гг.). Были подтверждены ранние научные результаты при исследовании корональных дыр[4,5].Возможно, корональные дыры являются единственным источником высокоскоростных потоков частиц солнечного ветра для спокойного Солнца, которые нарушают собственноемагнитное поле Земли и влияют на атмосферные эффекты, вызывая полярные сияния, геомагнитные бури,а также не исключено их влияние на метеорологические и геофизические события. Была получена квазилинейная зависимость между изменением площади однополярной корональной дыры и скоростью солнечного ветра для всего видимого диска. С ростом площади корональной дыры скорость солнечного ветра увеличивается, и наоборот. Полученный коэффициент корреляции 0,74 между площадью корональной дыры, проходящей через центральный меридиан и скоростью солнечного ветра в точке Лагранжа L1 позволяет говорить о квазилинейной зависимости.
Bounds for the divisibility-based and distinguishability-based non-Markovianity measures
Creators: name: Mäkelä, H.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We derive an upper bound for the distinguishability-based non-Markovianity measure of a two-level system and prove that for certain master equations the exact value of the measure achieves this bound. Furthermore, we obtain an easily calculable lower bound for the divisibility-based non-Markovianity measure of an $n$-level system. We illustrate the calculation of these bounds through examples, considering in detail the spin-boson model. We show that the differences between the two measures in the spin-boson model are caused by the drift vector that is also responsible for the non-unitality of the dynamical map.
description: 8 pages, one figure. v2: Typos corrected, one reference added
Einheit der Kirche - Einheit der Menschheit
Creators: name: Benedikt XVI., Papst
Publisher: name: Internationale katholische Zeitschrift Communio
Year: 2022

description: Internationale katholische Zeitschrift Communio, Bd. 1 Nr. 1 (1972): Internationale katholische Zeitschrift Communio, Band 1, Heft 1
Platform "Wir sind Kirche" (Hrsg.), Liebe - Eros - Sexualität
Creators: name: Prüller-Jagenteufel, Gunter M.
Publisher: name: Diakonia
Year: 1970

description: Diakonia, Bd. 28 Nr. 6 (1997): Diakonia, Band 28, Heft 6
A resolved rotating disk wind from a young T Tauri star in the Bok globule CB26
Creators: name: Launhardt, R.
name: Pavlyuchenkov, Ya. N.
name: Akimkin, V. V.
name: Dutrey, A.
name: Gueth, F.
name: Guilloteau, S.
name: Henning, Th.
name: Pietu, V.
name: Schreyer, K.
name: Semenov, D.
name: Stecklum, B.
name: Bourke, T. L.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The disk-outflow connection plays a key role in extracting excess angular momentum from a forming protostar. We have previously reported the discovery of a small molecular outflow from the edge-on T Tauri star in the Bok globule CB26 that shows a peculiar velocity pattern, reminiscent of an outflow that corotates with the disk. We report new, high-resolution mm-interferometric observations of CB26 with the aim of revealing the morphology and kinematics of the outflow at the disk-outflow interface. The IRAM PdBI was used to observe CO(2-1) at 1.3mm with a resolution of 0.5". Using a physical model of the disk, which was derived from the dust emission, we employed chemo-dynamical modeling combined with line radiative transfer to constrain kinematic parameters and to construct a model of the CO emission from the disk that allowed us to separate the emission of the disk from that of the outflow. Our observations confirm the disk-wind nature of the rotating molecular outflow from CB26. The new high-resolution data reveal an X-shaped morphology of the CO emission close to the disk, and vertical streaks extending from the disk surface with a small half-opening angle of ~7deg, which can be traced out to vertical heights of ~500au. We interpret this emission as the combination of the disk atmosphere and a well-collimated disk wind, which we trace down to vertical heights of 40au, where it is launched from the surface of the flared disk at radii of 20-45au. The observed CO outflow has a total momentum flux of 1e-5 Msun km/s/yr, which is nearly three orders of magnitude larger than the maximum thrust that can be provided by the luminosity of the central star. We conclude that photoevaporation cannot be the main driving mechanism for this outflow, but it must be predominantly an MHD disk wind. It is thus far the best-resolved rotating disk wind observed to be launched from a circumstellar disk.
description: Accepted by A&A, 25 pages, 19 figures
Polyakov SU(3) extended linear $σ$-model: Sixteen mesonic states in chiral phase-structure
Creators: name: Tawfik, Abdel Nasser
name: Diab, Abdel Magied
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Lattice (hep-lat)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The derivative of the grand potential in mean field approximation, non-strange and strange condensates and deconfinement phase-transition in thermal and dense hadronic medium are verified in extended SU(3) linear sigma-model (eLSM). In determining the chiral phase-transition, the chiral condensates sigma_x and sigma_y are analysed. The chiral mesonic phase-structures in temperature- and density-dependence are taken as free parameters to be fitted. These parameters are classified corresponding to scalar meson nonets; (pseudo)-scalar and (axial)-vector. For deconfinement phase-transition, effective Polyakov loop-potentials phi and phi^* are utilized. We investigated the in-medium effects on the masses of sixteen mesonic states states. The results are presented for two different forms for the effective Polyakov loop-potential and compared with other models with and without anomalous terms. The Polyakov loop potential in LSM has considerable effects on the chiral phase-transition in meson masses so that the restoration of the chiral symmetry becomes sharper and faster than LSM. We normalize all mesonic states with respect to the lowest Matsubara frequency. It has been found that the various mesonic states have different dissolving temperatures and chemical potentials, i.e. they survive the typically-averaged QCD phase boundary, defined by the QCD critical temperatures with varying chemical potentials. The thermal behavior of all meson masses has been investigated in the large-$N_c$ limit and found that the scalar meson masses are T-independent at large $N_c$ and high $T$ (except pi and sigma). For the pseudoscalar meson masses, the large N_c limit unifies the $T$-dependence of all states in a universal bundle. The same is also observed for axial and axialvector meson masses in the large-N_c limit.
description: 46 pages, 20 figures with 84 eps graphs and 78 references, to appear in Phys. Rev. c
title: „THE BUHO LINZ“
Creators: name: Kroh, Reinhold
Publisher: name: TU Wien
Year: 2020
Subjects: subject: Hotel

description: Da Linz in den letzten Jahren nicht nur einwohner- sondern auch flächenmäßig gewachsen ist und immer mehr an wirtschaftlicher Bedeutung gewinnt, bin ich der Meinung, dass ein weiteres Hotel, gelegen an einem äußerst günstigen Verkehrsknotenpunkt, für die Stadt nur eine Bereicherung sein und sie zu einem noch beliebteren Kongressziel machen kann. Vor allem, wenn man bedenkt, dass auch die Achse Perg-Linz-Wels, mit Linz als Mittelpunkt, einen Aufschwung in Sachen technologischer Start Up’s erlebt und somit plötzlich auch interessant für bislang „stadtfremde Branchen“ wird.
description: Over the past years Linz has been growing not only in terms of number of inhabitants but also in surface. At the same time Linz has continued to grow in terms of economic power. This is why I am of the opinion that a further hotel, situated in a very favorable traffic location cannot be but a benefit for the city and will help make Linz into an even more desired goal for conferences going forward. This is true especially in light of the fact that the axis Perg – Linz – Wels, with Linz as the center, has been enjoying a noticeable growth in terms of technological start ups. With this development Linz has also become all of a sudden interesting for industries, which have been “foreign” to the city so far.
Plausible association of distant late M dwarfs with low-frequency radio emission
Creators: name: Gloudemans, A. J.
name: Callingham, J. R.
name: Duncan, K. J.
name: Saxena, A.
name: Harikane, Y.
name: Hill, G. J.
name: Zeimann, G. R.
name: Rottgering, H. J. A.
name: Hardcastle, M. J.
name: Pineda, J. S.
name: Shimwell, T. W.
name: Smith, D. J. B.
name: Wagenveld, J. D.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present the serendipitous discovery of 8 distant ($>$ 50 pc) late M dwarfs with plausible associated radio emission at 144 MHz. The M dwarf nature of our sources has been confirmed with optical spectroscopy performed using HET/LRS2 and Subaru/FOCAS, and their radio flux densities are within the range of 0.5-1.0 mJy at 144 MHz. Considering the radio-optical source separation and source densities of the parent catalogues, we suggest that it is statistically probable the M dwarfs are associated with the radio emission. However, it remains plausible that for some of the sources the radio emission originates from an optically faint and red galaxy hiding behind the M dwarf. The isotropic radio luminosities ($\sim10^{17-18}$ erg s$^{-1}$ Hz$^{-1}$) of the M dwarfs suggest that if the association is real, the radio emission is likely driven by a coherent emission process produced via plasma or electron-cyclotron maser instability processes, which is potentially caused by binary interaction. Long term monitoring in the radio and high-resolution radio follow-up observations are necessary to search for any variability and pinpoint the radio emission to determine whether our tentative conclusion that these ultracool dwarfs are radio emitting is correct. If the low-frequency radio emission is conclusively associated with the M dwarfs, this would reveal a new population of optically faint and distant ($>$ 50 pc) radio emitting M dwarfs.
description: 10 pages, 5 figures, accepted for publication in A&A