cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The Hot Companion and Circumbinary Disk of the Be Star HR 2142
Creators: name: Peters, Geraldine J.
name: Wang, Luqian
name: Gies, Douglas R.
name: Grundstrom, Erika D.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present a spectroscopic investigation of the Be+sdO binary system HR 2142 that is based upon large sets of ultraviolet observations from the International Ultraviolet Explorer and ground-based H-alpha observations. We measured radial velocities for the Be star component from these spectra, and computed a revised orbit. In order to search for the spectral signature of the hot subdwarf, we cross-correlated the short wavelength end of each IUE spectrum with a model hot star spectrum, and then we used the predicted Doppler shifts of the subdwarf to shift-and-add all the cross-correlation functions to the frame of the subdwarf. This merged function shows the weak signal from the spectral lines of the hot star, and a best fit is obtained with a mass ratio M_2/M_1 = 0.07 +/- 0.02, companion temperature T_{eff} > 43 +/- 5 kK, projected rotational velocity V sin i < 30 km/s, and a monochromatic flux ratio near 1170 Angstroms of f_2/f_1 > 0.009 +/- 0.001. This hot subdwarf creates a one-armed spiral, tidal wake in the disk of the Be star, and we present a circumbinary disk model that can explain the occurrence of shell absorption lines by gas enhancements that occur where gas crossing the gap created by the subdwarf strikes the disk boundaries. The faint companion of HR 2142 may be representative of a significant fraction of Be stars with undetected former mass donor companion stars.
description: accepted by ApJ, 49 pages
Tracking the validity of the quasi-static and sub-horizon approximations in modified gravity
Creators: name: Orjuela-Quintana, J. Bayron
name: Nesseris, Savvas
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Within the framework of modified gravity (MG), the quasi-static (QS) and sub-horizon (SH) approximations are widely used in analyses aiming to identify departures from the concordance model at late-times. In general, it is assumed that time derivatives are subdominant with respect to spatial derivatives given that the relevant physical modes are those well inside the Hubble radius. In practice, the perturbation equations under these approximations are reduced to a tractable algebraic system in terms of the gravitational potentials and the perturbations of involved matter fields. Here, in the framework of $f(R)$ theories, we revisit standard results when these approximations are invoked using a new parameterization scheme that allows us to track the relevance of each time-derivative term in the perturbation equations. This new approach unveils terms which are neglected in the standard procedure. We assess the relevance of these differences by comparing results from both approaches against full numerical solutions for two well-known toy-models: the designer $f(R)$ model and the Hu-Sawicki model. We find that: i) the SH approximation can be safely applied to linear perturbation equations for scales $0.06 h/$Mpc $\lesssim k \lesssim 0.2 h/$Mpc, ii) in this "safety region", the QS approximation provides a very accurate description of the late-time cosmological dynamics even when dark energy significantly contribute to the cosmic budget, and iii) our new methodology performs better than the standard procedure, even for several orders of magnitude in some cases. Although, the impact of this major improvement on the linear observables is minimal for the studied cases, this does not represent an invalidation for our approach. Instead, our findings indicate that the perturbation expressions derived under these approximations in more general MG theories, such as Horndeski, should be also revisited.
description: 28 pages, 18 figures. Changes match published version
The official soundtrack to "Five shades of grey": generalization in multimodal distractor-based retrieval
Creators: name: Schöpper, Lars-Michael
name: Singh, Tarini
name: Frings, Christian
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2020
Subjects: subject: 150

description: When responding to two events in a sequence, the repetition or change of stimuli and the accompanying response can benefit or interfere with response execution: Full repetition leads to benefits in performance while partial repetition leads to costs. Additionally, even distractor stimuli can be integrated with a response, and can, upon repetition, lead to benefits or interference. Recently it has been suggested that not only identical, but also perceptually similar distractors retrieve a previous response (Singh et al., Attention, Perception, & Psychophysics, 78(8), 2307-2312, 2016): Participants discriminated four visual shapes appearing in five different shades of grey, the latter being irrelevant for task execution. Exact distractor repetitions yielded the strongest distractor-based retrieval effect, which decreased with increasing dissimilarity between shades of grey. In the current study, we expand these findings by conceptually replicating Singh et al. (2016) using multimodal stimuli. In Experiment 1 (N=31), participants discriminated four visual targets accompanied by five auditory distractors. In Experiment 2 (N=32), participants discriminated four auditory targets accompanied by five visual distractors. We replicated the generalization of distractor-based retrieval – that is, the distractor-based retrieval effect decreased with increasing distractor-dissimilarity. These results not only show that generalization in distractor-based retrieval occurs in multimodal feature processing, but also that these processes can occur for distractors perceived in a different modality to that of the target.
Anderson-Witting transport coefficients for flows in general relativity
Creators: name: Ambrus, Victor E.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The transport coefficients induced by the Anderson-Witting approximation of the collision term in the relativistic Boltzmann equation are derived for close to equilibrium flows in general relativity. Using the tetrad formalism, it is shown that the expression for these coefficients is the same as that obtained on flat space-time, in agreement with the generalized equivalence principle.
description: 6 pages, 1 figure, proceedings of TIM 15-16 conference (26-28 May 2016, Timisoara, Romania)
On the Centrality of the Focus in Human Epileptic Brain Networks
Creators: name: Geier, Christian
name: Kuhnert, Marie-Therese
name: Elger, Christian E.
name: Lehnertz, Klaus
Publisher: name: arXiv
Year: 2016
Subjects: subject: Neurons and Cognition (q-bio.NC)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: There is increasing evidence for specific cortical and subcortical large-scale human epileptic networks to be involved in the generation, spread, and termination of not only primary generalized but also focal onset seizures. The complex dynamics of such networks has been studied with methods of analysis from graph theory. In addition to investigating network-specific characteristics, recent studies aim to determine the functional role of single nodes---such as the epileptic focus---in epileptic brain networks and their relationship to ictogenesis. Utilizing the concept of betweenness centrality to assess the importance of network nodes, previous studies reported the epileptic focus to be of highest importance prior to seizures, which would support the notion of a network hub that facilitates seizure activity. We performed a time-resolved analysis of various aspects of node importance in epileptic brain networks derived from long-term, multi-channel, intracranial electroencephalographic recordings from an epilepsy patient. Our preliminary findings indicate that the epileptic focus is not consistently the most important network node, but node importance may drastically vary over time.
Creating Astronomy Festivals at Outdoor Concerts and Tourist Sites (US National Mall With Monuments and Museums) – 100,000 People Participated
Creators: name: Lubowich, Donald
Publisher: name: Zenodo
Year: 2023
Subjects: Astronomy Education

description: Title: Creating Astronomy Festivals at Outdoor Concerts and Tourist Sites (US National Mall With Monuments and Museums) – 100,000 People Participated

Presenter: Donald Lubowich (Hofstra University, USA)

 

This was a poster presented at the 5th Shaw-IAU Workshop on Astronomy for Education, organised by the IAU Office of Astronomy for Education (OAE, http//astro4edu.org).

I describe to how to create large astronomy festivals: Music and Astronomy Under the Stars (MAUS - NASA funded, 60% families many with young children; 60% female; 20% seniors at mostly-free outdoor concerts (some organized by underserved communities) and The Astronomy Festival on the National Mall (AFNM, co-sponsored by the White House in 2010). These feature: solar, optical telescope observations; live-image projection; posters/banners/videos; demos, hands-on activities; citizen science projects; plus info on discoveries, careers, and science museums. AFNM is the largest annual astronomy outreach event in the US (30,000 people, 4-5 K/yr) with 120 educators from 30 scientific institutions, universities, and astronomy clubs (AAAS, AAS, AGU, APS, NASA, NASM, NOAA, NOAO, NRAO, NSF, The Planetary Society, STScI, Sky and Tel, USNO). Yo-Yo-Ma, the Chicago and Boston Symphony Orchestras, Ravi Coltrane, Phish, Blood Sweat and Tears, Deep Purple, Patti Smith, James Taylor, and Wilco performed at some MAUS events (1000 – 25,000 people/concert).

About the 5th Shaw-IAU Workshop on Astronomy for Education:This year’s Shaw-IAU Workshop on Astronomy for Education focuses on two themes: one special practical astronomy education topic and one scientific topic. The special topic is astronomy education outside the classroom, looking at how astronomy can be taught in a diverse range of environments such as science centers, planetaria and youth clubs. The scientific topic is planetary atmospheres, both in the solar system and exoplanets as well as our own Earth. The workshop was organised by the IAU Office of Astronomy for Education (http://astro4edu.org). More details can be found on: https://astro4edu.org/shaw-iau/5th-shaw-iau-workshop/schedule/

Keep up to date with future Shaw-IAU Workshops and other opportunities at the IAU Office of Astronomy for Education by joining our mailing list https://astro4edu.org/mailing-list/

Follow the IAU OAE on X and Facebook under @astro4edu
Relativistic Brueckner-Hartree-Fock theory for finite nuclei
Creators: name: Shen, Shihang
name: Hu, Jinniu
name: Liang, Haozhao
name: Meng, Jie
name: Ring, Peter
name: Zhang, Shuangquan
Publisher: name: arXiv
Year: 2016
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Starting with a bare nucleon-nucleon interaction, for the first time the full relativistic Brueckner-Hartree-Fock equations are solved for finite nuclei in a Dirac-Woods-Saxon basis. No free parameters are introduced to calculate the ground-state properties of finite nuclei. The nucleus $^{16}$O is investigated as an example. The resulting ground-state properties, such as binding energy and charge radius, are considerably improved as compared with the non-relativistic Brueckner-Hartree-Fock results and much closer to the experimental data. This opens the door for \emph{ab initio} covariant investigations of heavy nuclei.
Nonlocal wave turbulence in non-Abelian plasmas
Creators: name: Mehtar-Tani, Yacine
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Chaotic Dynamics (nlin.CD)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We investigate driven wave turbulence in non-Abelian plasmas, in the framework of kinetic theory where both elastic and inelastic processes are considered in the small angle approximation. The gluon spectrum, that forms in the presence of a steady source, is shown to be controlled by nonlocal interactions in momentum space, in contrast to the universal Kolmogorov-Zakharov spectra. Assuming strongly nonlocal interactions, we show that inelastic processes are dominant in the IR and cause a thermal bath to form below the forcing scale, as a result of a detailed balance between radiation and absorption of soft gluons by the hard ones. Above the forcing scale, the inelastic collision term reduces to an inhomogeneous diffusion-like equation yielding a spectrum that spreads to the UV as $t^{1/2}$, similarly to elastic processes. Due to nonlocal interactions the non-universal turbulent spectrum is not steady and flattens when time goes on toward the thermal distribution. This analysis is complemented by numerical simulations, where we observe that in the explored time interval the spectral exponent of the nonlocal turbulent cascade is close to $-2$ in agreement with simulations of classical Yang-Mills equations.
description: 77 pages, 19 figures
Arbeiten mit biographischen Daten am Beispiel Wikidata
Creators: name: Kaiser, Maximilian
Publisher: name: Zenodo
Year: 2023
Subjects: wikidata
digital humanities
prosopographical data
biographical data

description: presentation at kuwiki tips & tools #6 Vortrag »Arbeiten mit biographischen Daten am Beispiel Wikidata« von Maximilian Kaiser im Rahmen der Veranstaltung »Wikidata«, Vortragsreihe kuwiki tips & tools der AG kuwiki. Kunstwissenschaften + Wikipedia kuwiki tips & tools #6: Wikidata 11.05.2023, 18.00–19.30 Uhr, online
ACAT: Adversarial Counterfactual Attention for Classification and Detection in Medical Imaging
Creators: name: Fontanella, Alessandro
name: Antoniou, Antreas
name: Li, Wenwen
name: Wardlaw, Joanna
name: Mair, Grant
name: Trucco, Emanuele
name: Storkey, Amos
Publisher: name: arXiv
Year: 2023
Subjects: subject: Image and Video Processing (eess.IV)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: In some medical imaging tasks and other settings where only small parts of the image are informative for the classification task, traditional CNNs can sometimes struggle to generalise. Manually annotated Regions of Interest (ROI) are sometimes used to isolate the most informative parts of the image. However, these are expensive to collect and may vary significantly across annotators. To overcome these issues, we propose a framework that employs saliency maps to obtain soft spatial attention masks that modulate the image features at different scales. We refer to our method as Adversarial Counterfactual Attention (ACAT). ACAT increases the baseline classification accuracy of lesions in brain CT scans from 71.39% to 72.55% and of COVID-19 related findings in lung CT scans from 67.71% to 70.84% and exceeds the performance of competing methods. We investigate the best way to generate the saliency maps employed in our architecture and propose a way to obtain them from adversarially generated counterfactual images. They are able to isolate the area of interest in brain and lung CT scans without using any manual annotations. In the task of localising the lesion location out of 6 possible regions, they obtain a score of 65.05% on brain CT scans, improving the score of 61.29% obtained with the best competing method.
description: International Conference on Machine Learning 2023. 17 pages, 7 figures
Comparison of analytic and numerical bond-order potentials for W and Mo
Creators: name: Cak, Miroslav
name: Hammerschmidt, Thomas
name: Drautz, Ralf
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Bond-order potentials (BOPs) are derived from the tight-binding (TB) approximation and provide a linearly-scaling computation of the energy and forces for a system of interacting atoms. While the numerical BOPs involve the numerical integration of the response (Green's) function, the expressions for the energy and interatomic forces are analytical within the formalism of the analytic BOPs. In this paper we present a detailed comparison of numerical and analytic BOPs. We use established parametrisations for the bcc refractory metals W and Mo and test structural energy differences; tetragonal, trigonal, hexagonal and orthorhombic deformation paths; formation energies of point defects as well as phonon dispersion relations. We find that the numerical and analytic BOPs generally are in very good agreement for the calculation of energies. Different from the numerical BOPs, the forces in the analytic BOPs correspond exactly to the negative gradients of the energy. This makes it possible to use the analytic BOPs in dynamical simulations and leads to improved predictions of defect energies and phonons as compared to the numerical BOPs.
Effective drug treatment identified by in vivo screening in a transplantable patient-derived xenograft model of chronic myelomonocytic leukemia
Creators: name: Kloos, Arnold
name: Mintzas, Konstantinos
name: Winckler, Lina
name: Gabdoulline, Razif
name: Alwie, Yasmine
name: Jyotsana, Nidhi
name: Kattre, Nadine
name: Schottmann, Renate
name: Scherr, Michaela
name: Gupta, Charu
name: Adams, Felix F
name: Schwarzer, Adrian
name: Heckl, Dirk
name: Schambach, Axel
name: Imren, Suzan
name: Humphries, R Keith
name: Ganser, Arnold
name: Thol, Felicitas
name: Heuser, Michael
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2020
Subjects: subject: 610

description: To establish novel and effective treatment combinations for chronic myelomonocytic leukemia (CMML) preclinically, we hypothesized that supplementation of CMML cells with the human oncogene Meningioma 1 (MN1) promotes expansion and serial transplantability in mice, while maintaining the functional dependencies of these cells on their original genetic profile. Using lentiviral expression of MN1 for oncogenic supplementation and transplanting transduced primary mononuclear CMML cells into immunocompromised mice, we established three serially transplantable CMML-PDX models with disease-related gene mutations that recapitulate the disease in vivo. Ectopic MN1 expression was confirmed to enhance the proliferation of CMML cells, which otherwise did not engraft upon secondary transplantation. Furthermore, MN1-supplemented CMML cells were serially transplantable into recipient mice up to 5 generations. This robust engraftment enabled an in vivo RNA interference screening targeting CMML-related mutated genes including NRAS, confirming that their functional relevance is preserved in the presence of MN1. The novel combination treatment with azacitidine and the MEK-inhibitor trametinib additively inhibited ERK-phosphorylation and thus depleted the signal from mutated NRAS. The combination treatment significantly prolonged survival of CMML mice compared to single-agent treatment. Thus, we identified the combination of azacitidine and trametinib as an effective treatment in NRAS-mutated CMML and propose its clinical development.
Hodge Numbers for All CICY Quotients
Creators: name: Constantin, Andrei
name: Gray, James
name: Lukas, Andre
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We present a general method for computing Hodge numbers for Calabi-Yau manifolds realised as discrete quotients of complete intersections in products of projective spaces. The method relies on the computation of equivariant cohomologies and is illustrated for several explicit examples. In this way, we compute the Hodge numbers for all discrete quotients obtained in Braun's classification arXiv:1003.3235.
description: 34 pages, 1 figure
Dual Density Operators and Natural Language Meaning
Creators: name: Ashoush, Daniela
name: Coecke, Bob
Publisher: name: arXiv
Year: 2016
Subjects: subject: Computation and Language (cs.CL)
subject: Logic in Computer Science (cs.LO)
subject: Quantum Physics (quant-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: Density operators allow for representing ambiguity about a vector representation, both in quantum theory and in distributional natural language meaning. Formally equivalently, they allow for discarding part of the description of a composite system, where we consider the discarded part to be the context. We introduce dual density operators, which allow for two independent notions of context. We demonstrate the use of dual density operators within a grammatical-compositional distributional framework for natural language meaning. We show that dual density operators can be used to simultaneously represent: (i) ambiguity about word meanings (e.g. queen as a person vs. queen as a band), and (ii) lexical entailment (e.g. tiger -> mammal). We provide a proof-of-concept example.
description: In Proceedings SLPCS 2016, arXiv:1608.01018
El videojuego y la tradición del juego. Educación y sombras de la sociedad digital
Creators: name: Barinaga, Borja
Publisher: name: Zenodo
Year: 2016
Subjects: computer
videogame
education
communication

description: There is great interest in turning video games into a tool for education. However, its potential to promote specific educational processes has yet to be tested. To this day, so-called serious games have only been successful in indoctrination, propaganda, and military use. Analyzing the game's evolution and narrative possibilities, we can see certain shadows within the optimism regarding video games as a support for education. This article analyzes self-created expectations within a context of economic and ideological exploitation, which camouflages powers linked to large companies and technological corporations, where epistemological principles that prove to be misleading are established. For this purpose, relevant information is provided, which, In most of the studies carried out with an excessively optimistic tone, is left aside.
Stargazing to Star-Teaching: Effective Approaches for Astronomy Education in Action
Creators: name: N, Amoghavarsha
Publisher: name: Zenodo
Year: 2023
Subjects: Astronomy Education

description: Title: Stargazing to Star-Teaching: Effective Approaches for Astronomy Education in Action

Presenter: Amoghavarsha N (Indian Institute of Astrophysics, India)

Collaborators:R. Punith (Iindian Institute of Astrophysics)Niruj Mohan Ramanujam (Iindian Institute of Astrophysics)B. S. Shylaja (Jawaharlal Nehru Planetarium)S. Seetha (Raman Research Institute)Annapurni Subramaniam (Iindian Institute of Astrophysics)

 

This was a poster presented at the 5th Shaw-IAU Workshop on Astronomy for Education, organised by the IAU Office of Astronomy for Education (OAE, http//astro4edu.org).

"COSMOS" is the upcoming world's first commercial 8K-resolution LED dome planetarium in the city of Mysuru, Karnataka, India. While awaiting construction, the IIA has started a comprehensive education and outreach program in the city and its neighbourhoods. One of the main objectives is to use the LED dome to train students in data analysis using current data from telescopes, as well as to incorporate all major STEM events.We have started education & outreach programs in the district and aim to extend them to neighbouring districts as well. We are building a common platform for educators, science communicators, and other stakeholders in the area. In this talk, I will describe our programs, methodology, and their efficacy and end with future plans to use the facilities of the planetarium.

About the 5th Shaw-IAU Workshop on Astronomy for Education:This year’s Shaw-IAU Workshop on Astronomy for Education focuses on two themes: one special practical astronomy education topic and one scientific topic. The special topic is astronomy education outside the classroom, looking at how astronomy can be taught in a diverse range of environments such as science centers, planetaria and youth clubs. The scientific topic is planetary atmospheres, both in the solar system and exoplanets as well as our own Earth. The workshop was organised by the IAU Office of Astronomy for Education (http://astro4edu.org). More details can be found on: https://astro4edu.org/shaw-iau/5th-shaw-iau-workshop/schedule/

Keep up to date with future Shaw-IAU Workshops and other opportunities at the IAU Office of Astronomy for Education by joining our mailing list https://astro4edu.org/mailing-list/

Follow the IAU OAE on X and Facebook under @astro4edu
Chaperone driven polymer translocation through Nanopore: spatial distribution and binding energy
Creators: name: Abdolvahab, Rouhollah Haji
Publisher: name: arXiv
Year: 2016
Subjects: subject: Biological Physics (physics.bio-ph)
subject: FOS: Physical sciences

description: Chaperones are binding proteins which work as a driving force to bias the biopolymer translocation by binding to it near the pore and preventing its backsliding. Chaperones may have different spatial distribution. Recently we show the importance of their spatial distribution in translocation and how it effects on sequence dependency of the translocation time. Here we focus on homopolymers and exponential distribution. As a result of the exponential distribution of chaperones, energy dependency of the translocation time will changed and one see a minimum in translocation time versus effective energy curve. The same trend can be seen in scaling exponent of time versus polymer length, $β$ ($T\simβ$). Interestingly in some special cases e.g. chaperones of size $λ=6$ and with exponential distribution rate of $α=5$, the minimum reaches even to amount of less than $1$ ($β<1$). We explain the possibility of this rare result and base on a theoretical discussion we show that by taking into account the velocity dependency of the translocation on polymer length, one could truly predict the amount of this minimum.
A multi-resolution, multi-epoch low radio frequency survey of the Kepler K2 mission Campaign 1 field
Creators: name: Tingay, S. J.
name: Hancock, P. J.
name: Wayth, R. B.
name: Intema, H.
name: Jagannathan, P.
name: Mooley, K.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: We present the first dedicated radio continuum survey of a Kepler K2 mission field, Field 1 covering the North Galactic Cap. The survey is wide field, contemporaneous, multi-epoch, and multi-resolution in nature and was conducted at low radio frequencies between 140 and 200 MHz. The multi-epoch and ultra wide field (but relatively low resolution) part of the survey was provided by 15 nights of observation with the Murchison Widefield Array (MWA) over a period of approximately a month, contemporaneous with K2 observations of the field. The multi-resolution aspect of the survey was provided by the low resolution (4') MWA imaging, complemented by non-contemporaneous but much higher resolution (20") observations using the Giant Metrewave Radio Telescope (GMRT). The survey is therefore sensitive to the details of radio structures across a wide range of angular scales. Consistent with other recent low radio frequency surveys, no significant radio transients or variables were detected in the survey. The resulting source catalogs consist of 1,085 and 1,468 detections in the two MWA observation bands (centered at 154 and 185 MHz, respectively) and 7,445 detections in the GMRT observation band (centered at 148 MHz), over 314 square degrees. The survey is presented as a significant resource for multi-wavelength investigations of the more than 21,000 target objects in the K2 field. We briefly examine our survey data against K2 target lists for dwarf star types (stellar types M and L) that have been known to produce radio flares.
description: 15 pages, 6 figures
Procedural Generation of Complex Roundabouts for Autonomous Vehicle Testing
Creators: name: Ikram, Zarif
name: Muktadir, Golam Md
name: Whitehead, Jim
Publisher: name: arXiv
Year: 2023
Subjects: subject: Robotics (cs.RO)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: High-definition roads are an essential component of realistic driving scenario simulation for autonomous vehicle testing. Roundabouts are one of the key road segments that have not been thoroughly investigated. Based on the geometric constraints of the nearby road structure, this work presents a novel method for procedurally building roundabouts. The suggested method can result in roundabout lanes that are not perfectly circular and resemble real-world roundabouts by allowing approaching roadways to be connected to a roundabout at any angle. One can easily incorporate the roundabout in their HD road generation process or use the standalone roundabouts in scenario-based testing of autonomous driving.
description: (6 Pages) Accepted at IEEE Intelligent Vehicles Symposium 2023
Unfolding the Unknown: Astronomy Education in Romania
Creators: name: Naghi, Elisabeta Ana
Publisher: name: Zenodo
Year: 2023
Subjects: Astronomy Education

description: Title: Unfolding the Unknown: Astronomy Education in Romania

Presenter: Elisabeta Ana Naghi (Nationa Education Ministry, Romania)

 

This was a poster presented at the 5th Shaw-IAU Workshop on Astronomy for Education, organised by the IAU Office of Astronomy for Education (OAE, http//astro4edu.org).

 

About the 5th Shaw-IAU Workshop on Astronomy for Education:This year’s Shaw-IAU Workshop on Astronomy for Education focuses on two themes: one special practical astronomy education topic and one scientific topic. The special topic is astronomy education outside the classroom, looking at how astronomy can be taught in a diverse range of environments such as science centers, planetaria and youth clubs. The scientific topic is planetary atmospheres, both in the solar system and exoplanets as well as our own Earth. The workshop was organised by the IAU Office of Astronomy for Education (http://astro4edu.org). More details can be found on: https://astro4edu.org/shaw-iau/5th-shaw-iau-workshop/schedule/

Keep up to date with future Shaw-IAU Workshops and other opportunities at the IAU Office of Astronomy for Education by joining our mailing list https://astro4edu.org/mailing-list/

Follow the IAU OAE on X and Facebook under @astro4edu
Interacting Conceptual Spaces
Creators: name: Bolt, Josef
name: Coecke, Bob
name: Genovese, Fabrizio
name: Lewis, Martha
name: Marsden, Daniel
name: Piedeleu, Robin
Publisher: name: arXiv
Year: 2016
Subjects: subject: Artificial Intelligence (cs.AI)
subject: Computation and Language (cs.CL)
subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences

description: We propose applying the categorical compositional scheme of [6] to conceptual space models of cognition. In order to do this we introduce the category of convex relations as a new setting for categorical compositional semantics, emphasizing the convex structure important to conceptual space applications. We show how conceptual spaces for composite types such as adjectives and verbs can be constructed. We illustrate this new model on detailed examples.
description: In Proceedings SLPCS 2016, arXiv:1608.01018
A catalog of 1.5273 micron diffuse interstellar bands based on APOGEE hot telluric calibrators
Creators: name: Elyajouri, Meriem
name: Monreal-Ibero, Ana
name: Remy, Quentin
name: Lallement, Rosine
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: High resolution stellar spectroscopic surveys provide massive amounts of diffuse interstellar bands (DIBs) measurements. Data can be used to study the distribution of the DIB carriers and those environmental conditions that favor their formation. In parallel, recent studies have also proved that DIBs extracted from stellar spectra constitute new tools for building the 3D structure of the Galactic Interstellar Medium (ISM). The amount of details on the structure depends directly on the quantity of available lines of sight (LOS). Therefore there is a need to construct databases of high-quality DIB measurements as large as possible. We aim at providing the community with a catalog of high-quality measurements of the 1.5273 micron DIB towards a large fraction of the Apache Point Observatory Galactic Evolution Experiment (APOGEE) hot stars observed to correct for the telluric absorption and not used for ISM studies so far. This catalog would complement the extensive database recently extracted from the APOGEE observations and used for 3D ISM mapping. We devised a method to fit the stellar continuum of the hot calibration stars and extracted the DIB from the normalized spectrum. Severe selection criteria based on the absorption characteristics are applied to the results. In particular limiting constraints on the DIB widths and Doppler shifts are deduced from the HI 21 cm measurements, following a new technique of decomposition of the emission spectra. From ~16 000 available hot telluric spectra we have extracted ~ 6700 DIB measurements and their associated uncertainties. The statistical properties of the extracted absorptions are examined and our selection criteria are shown to provide a robust dataset. The resulting catalog contains the DIB total equivalent widths, central wavelengths and widths. We briefly illustrate its potential use for the stellar and interstellar communities.
description: The Astrophysical Journal Supplement, in press, 35 pages, 14 figures
Bursting and Synchrony in Networks of Model Neurons
Creators: name: Geier, Christian
name: Rothkegel, Alexander
name: Elger, Christian E.
name: Lehnertz, Klaus
Publisher: name: arXiv
Year: 2016
Subjects: subject: Neurons and Cognition (q-bio.NC)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: Bursting neurons are considered to be a potential cause of over-excitability and seizure susceptibility. The functional influence of these neurons in extended epileptic networks is still poorly understood. There is mounting evidence that the dynamics of neuronal networks is influenced not only by neuronal and synaptic properties but also by network topology. We investigate numerically the influence of different neuron dynamics on global synchrony in neuronal networks with complex connection topologies.
Proceedings of the Fourth International Workshop on Verification and Program Transformation
Creators: name: Hamilton, Geoff
name: Lisitsa, Alexei
name: Nemytykh, Andrei P.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Programming Languages (cs.PL)
subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: This volume contains the revised versions of papers presented at the Fourth International Workshop on Verification and Program Transformation (VPT 2016) on April 2, 2016 in Eindhoven, The Netherlands. The workshop is an event of the European Joint Conferences on Theory and Practice of Software (ETAPS 2016). The aim of the VPT workshops is to provide a forum where people from the area of program transformation and the area of program verification can fruitfully exchange ideas and gain a deeper understanding of the interactions between those two fields. The research papers which have been recently published in those fields, show that the interactions are very beneficial and, indeed, go both ways. In one direction, methods and tools developed in the field of program transformation, such as partial deduction, partial evaluation, fold/unfold transformations, and supercompilation, have all been applied with success for the verification of systems, and in particular, the verification of infinite state and parameterized systems. In the other direction, methods developed in program verification, such as model checking, abstract interpretation, SAT and SMT solving, and automated theorem proving, have been used to enhance program transformation techniques, thereby making these techniques more powerful and useful in practice.
Effects of income redistribution on the evolution of cooperation in spatial public goods games
Creators: name: Pei, Zhenhua
name: Wang, Baokui
name: Du, Jinming
Publisher: name: arXiv
Year: 2016
Subjects: subject: Physics and Society (physics.soc-ph)
subject: General Finance (q-fin.GN)
subject: FOS: Physical sciences
subject: FOS: Economics and business

description: Income redistribution is the transfer of income from some individuals to others directly or indirectly by means of social mechanisms, such as taxation, public services and so on. Employing a spatial public goods game, we study the influence of income redistribution on the evolution of cooperation. Two kinds of evolutionary models are constructed, which describe local and global redistribution of income respectively. In the local model, players have to pay part of their income after each PGG and the accumulated income is redistributed to the members. While in the global model, all the players pay part of their income after engaging in all the local PGGs, which are centered on himself and his nearest neighbours, and the accumulated income is redistributed to the whole population. We show that the cooperation prospers significantly with increasing income expenditure proportion in the local redistribution of income, while in the global model the situation is opposite. Furthermore, the cooperation drops dramatically from the maximum curvature point of income expenditure proportion. In particular, the intermediate critical points are closely related to the renormalized enhancement factors.
description: 13 pages, 6 figures
Non-Hermitian superintegrable systems
Creators: name: Correa, Francisco
name: Inzunza, Luis
name: Marquette, Ian
Publisher: name: arXiv
Year: 2023
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A non-Hermitian generalisation of the Marsden--Weinstein reduction method is introduced to construct families of quantum $\mathcal{PT}$-symmetric superintegrable models over an $n$-dimensional sphere $S^n$. The mechanism is illustrated with one- and two-dimensional examples, related to $u(2)$ and $u(3)$ Lie algebras respectively, providing new quantum models with real spectra and spontaneous $\mathcal{PT}$-symmetric breaking. In certain limits, the models reduce to known non-Hermitian systems and complex extensions of previously studied real superintegrable systems.
description: 18 pages, no figures
Tempus. Ein konstruktionsgrammatischer Blick in die Kerngrammatik
Creators: name: Lasch, Alexander
Publisher: name: Zenodo
Year: 2024

description: Vortrag im Rahmen des (romanistischen) Linguistischen Kolloquiums an der LMU München, 31. Januar 2024.

Tempus ist eine höchst kontrovers diskutierte Kategorie in den Grammatiken des Deutschen. Das hat sowohl historische wie auch systematische Gründe und berührt insbesondere die Frage, unter welchen Prämissen sich eine Grammatikographie der Analyse von (Temporalität und) Tempus zuwendet. Im Vortrag wird der Versuch unternommen, Konstruktionen im Rahmen eines semantisch motivierten Konstruktikons des Deutschen zu verorten und zu beschreiben, die temporale Bezüge codieren.
A kinetic scheme with variable velocities and relative entropy
Creators: name: Roy, Shashi Shekhar
name: Rao, S. V. Raghurama
Publisher: name: arXiv
Year: 2023
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: A new kinetic model is proposed where the equilibrium distribution with bounded support has a range of velocities about two average velocities in 1D. In 2D, the equilibrium distribution function has a range of velocities about four average velocities, one in each quadrant. In the associated finite volume scheme, the average velocities are used to enforce the Rankine-Hugoniot jump conditions for the numerical diffusion at cell-interfaces, thereby capturing steady discontinuities exactly. The variable range of velocities is used to provide additional diffusion in smooth regions. Further, a novel kinetic theory based expression for relative entropy is presented which, along with an additional criterion, is used to identify expansions and smooth flow regions. Appropriate flow tangency and far-field boundary conditions are formulated for the proposed kinetic model. Several benchmark 1D and 2D compressible flow test cases are solved to demonstrate the efficacy of the proposed solver.
The Potsdam MRS Spectrograph - heritage of MUSE and the impact of cross-innovation in the process of technology transfer
Creators: name: Moralejo, Benito
name: Roth, Martin M.
name: Godefroy, Philippe
name: Fechner, Thomas
name: Bauer, Svend M.
name: Schmälzlin, Elmar
name: Kelz, Andreas
name: Haynes, Roger
Publisher: name: arXiv
Year: 2016
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: After having demonstrated that an IFU, attached to a microscope rather than to a telescope, is capable of differentiating complex organic tissue with spatially resolved Raman spectroscopy, we have launched a clinical validation program that utilizes a novel optimized fiber-coupled multi-channel spectrograph whose layout is based on the modular MUSE spectrograph concept. The new design features a telecentric input and has an extended blue performance, but otherwise maintains the properties of high throughput and excellent image quality over an octave of wavelength coverage with modest spectral resolution. We present the opto-mechanical layout and details of its optical performance.
description: 13 pages, 13 figures. Submitted in SPIE Astronomical Telescopes + Instrumentation, Paper No. 9912-72
Words, Concepts, and the Geometry of Analogy
Creators: name: McGregor, Stephen
name: Purver, Matthew
name: Wiggins, Geraint
Publisher: name: arXiv
Year: 2016
Subjects: subject: Computation and Language (cs.CL)
subject: FOS: Computer and information sciences

description: This paper presents a geometric approach to the problem of modelling the relationship between words and concepts, focusing in particular on analogical phenomena in language and cognition. Grounded in recent theories regarding geometric conceptual spaces, we begin with an analysis of existing static distributional semantic models and move on to an exploration of a dynamic approach to using high dimensional spaces of word meaning to project subspaces where analogies can potentially be solved in an online, contextualised way. The crucial element of this analysis is the positioning of statistics in a geometric environment replete with opportunities for interpretation.
description: In Proceedings SLPCS 2016, arXiv:1608.01018
Wigner law for matrices with dependent entries - a perturbative approach
Creators: name: Krajewski, T.
name: Tanasa, A.
name: Vu, D. L.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Combinatorics (math.CO)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We show that Wigner semi-circle law holds for Hermitian matrices with dependent entries, provided the deviation of the cumulants from the normalised Gaussian case obeys a simple power law bound in the size of the matrix. To establish this result, we use replicas interpreted as a zero-dimensional quantum field theoretical model whose effective potential obey a renormalisation group equation.
description: 9 pages, 4 figures
Inspiral waveforms for spinning compact binaries in a new precessing convention
Creators: name: Gupta, Anuradha
name: Gopakumar, Achamveedu
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: It is customary to use a precessing convention, based on Newtonian orbital angular momentum ${\bf L}_{\rm N}$, to model inspiral gravitational waves from generic spinning compact binaries. A key feature of such a precessing convention is its ability to remove all spin precession induced modulations from the orbital phase evolution. However, this convention usually employs a post-Newtonian (PN) accurate precessional equation, appropriate for the PN accurate orbital angular momentum ${\bf L}$, to evolve the ${\bf L}_{\rm N}$-based precessing source frame. This motivated us to develop inspiral waveforms for spinning compact binaries in a precessing convention that explicitly use ${\bf L}$ to describe the binary orbits. Our approach introduces certain additional 3PN order terms in the orbital phase and frequency evolution equations with respect to the usual ${\bf L}_{\rm N}$-based implementation of the precessing convention. The implications of these additional terms are explored by computing the match between inspiral waveforms that employ ${\bf L}$ and ${\bf L}_{\rm N}$-based precessing conventions. We found that the match estimates are smaller than the optimal value, namely 0.97, for a non-negligible fraction of unequal mass spinning compact binaries.
description: 4 pages, 1 figures, published in the proceedings of Amaldi 11
Rotational dynamics induced by low energy binary collisions of quantum droplets
Creators: name: Alba-Arroyo, J. E.
name: Caballero-Benitez, S. F.
name: Jauregui, R.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Atomic Physics (physics.atom-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A theoretical analysis of the rotational dynamics induced by off axis binary collisions of quantum droplets constituted by ultracold atoms is reported. We focus on quantum droplets formed by degenerate dilute Bose gases made up from binary mixtures of alkaline atoms under feasible experimental conditions. The stability of the ground state is known to be longer for the chosen heteronuclear gases than for the homonuclear ones. In both cases, we find out that the dynamics seems to privilege a high similarity of the density of each atomic species. However, the evolution of the phase of the corresponding order parameter differs significantly for heteronuclear admixtures. We evaluate the fidelity as a figure of merit for the overlap between the order parameters of each atomic species. Dynamical evidence of the differences between the phase of the order parameters are predicted to manifest in their corresponding linear and angular momenta. We numerically verify that the total angular and linear momenta are conserved both during the collision. Some direct correlations between the Weber number and the impact parameter with the distribution of the dynamical variables are established.
description: 12 pages, 6 figures
Quantifier Scope in Categorical Compositional Distributional Semantics
Creators: name: Sadrzadeh, Mehrnoosh
Publisher: name: arXiv
Year: 2016
Subjects: subject: Computation and Language (cs.CL)
subject: Artificial Intelligence (cs.AI)
subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences

description: In previous work with J. Hedges, we formalised a generalised quantifiers theory of natural language in categorical compositional distributional semantics with the help of bialgebras. In this paper, we show how quantifier scope ambiguity can be represented in that setting and how this representation can be generalised to branching quantifiers.
description: In Proceedings SLPCS 2016, arXiv:1608.01018