cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
K-shell photoionization of Be-like Boron (B$^+$) Ions: Experiment and Theory
Creators: name: Mueller, A
name: Schippers, S
name: Phaneuf, R A
name: Scully, S W J
name: Aguilar, A
name: Cisneros, C
name: Gharaibeh, M F
name: Schlachter, A S
name: McLaughlin, B M
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Absolute cross sections for the K-shell photoionization of Be-like boron ions were measured with the ion-photon merged-beams technique at the Advanced Light Source synchrotron radiation facility. High-resolution spectroscopy with E/$Δ$E up to 8800 ($Δ$E $\sim$ 22 meV) covered the energy ranges 193.7 -- 194.7 eV and 209 -- 215 eV. Lifetimes of the strongest resonances are determined with relative uncertainties down to approximately 4% for the broadest resonance. The measured resonance strengths are consistent with 60 % $\rm 1s^22s^2$ $^1S$ ground-state and 40 % $\rm 1s^22s2p$ $^3P^o$ metastable-state ions in the primary ion beam and confirmed by comparison with independent absolute photo-recombination heavy-ion storage-ring measurements with B$^{2+}$ ions using the principle of detailed balance. Experimental determination of the line width for the $\rm 1s2s^22p$ $^1$P$^{\rm o}$ resonance gives a value of 47 $\pm$ 2 meV and compares favourably to a theoretical estimate of 47 meV from the R-matrix with pseudo-states (RMPS) method. The measured line widths of the $\rm 1s2s2p^2$ $^3$P, $^3$D resonances are 10.0 $\pm$ 2 meV and 32 $\pm$ 3meV, respectively, compared to RMPS theoretical estimates of 9 meV and 34 meV.
description: 23 pages, 6 figures, 2 tables, accepted for publication in J. Phys. B
Family Saves: An Experiment in Reaching Efficiencies of Scale in Individual Development Account Policy and Programming
Creators: name: Kassam, Salimah
Publisher: name: Faculty of Graduate Studies
Year: 2013

description: Asset building is an effective poverty reduction tool, evident through thirty years of research and programming in the field throughout the United States. Individual Development Account programming targets individuals experiencing living on a low income, a state of transition and/or at-risk of homelessness/homeless and provides money management education and monetary incentives in the form of matched funds to encourage savings patterns and asset accumulation. Individual Development Account programs have proven to move people out of poverty and into financial stability through using an asset building approach. Though effective and outcome driven, Individual Development Account programs are costly and require large investments in human and financial resources in-order to operate successfully. This paper determines best practices and strategies in reaching efficiencies in Individual Development Account programs from the field of asset building and merges academic research in behavioural economics to produce an experiment in scaling the Fair Gains Individual Development Account Program at Momentum Community Economic Development.
Detection of a dense group of hyper-compact radio sources in the central parsec of the Galaxy
Creators: name: Zhao, Jun-Hui
name: Morris, Mark R.
name: Goss, W. M.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Using the JVLA, we explored the Galactic center (GC) with a resolution of 0.05" at 33.0 and 44.6 GHz. We detected 64 hyper-compact radio sources (HCRs) in the central parsec. The dense group of HCRs can be divided into three spectral types: 38 steep-spectrum ($α\le-0.5$) sources; 10 flat-spectrum ($-0.50.2$, assuming $S\proptoν^α$. The steep-spectrum HCRs are likely represent a population of massive stellar remnants associated with nonthermal compact radio sources powered by neutron stars and stellar black holes. The surface-density distribution of the HCRs as function of radial distance ($R$) from Sgr~A* can be described as a steep power-law $Σ(R) \propto R^{-Γ}$, with $Γ=1.6\pm0.2$, along with presence of a localized order-of-magnitude enhancement in the range 0.1-0.3 pc. The steeper profile of the HCRs relative to that of the central cluster might result from the concentration massive stellar remnants by mass segregation at the GC. The GC magnetar SGR~J1745-2900 belongs to the inverted-spectrum sub-sample. We find that two spectral components present in the averaged radio spectrum of SGR~J1745-2900, separated at $ν\sim30$ GHz. The centimeter-component is fitted to a power-law with $α_{cm}=-1.5\pm0.6$. The enhanced millimeter-component shows a rising spectrum $α_{mm}=1.1\pm0.2$. Based on the ALMA observations at 225 GHz, we find that the GC magnetar is highly variable on a day-to-day time scale, showing variations up to a factor of 6. Further JVLA and ALMA observations of the variability, spectrum, and polarization of the HCRs are critical for determining whether they are associated with stellar remnants.
description: 20 pages, 11 figures, ApJ accepted
title: Ð¢ÐµÐ¾ÑÐµÑÐ¸ÑÐµÑÐºÐ¸Ðµ Ð¾ÑÐ½Ð¾Ð²Ñ Ð¿ÑÐ¾Ð¸Ð·Ð²Ð¾Ð´ÑÑÐ²Ð° Ð¸Ð·Ð´ÐµÐ»Ð¸Ð¹ Ñ Ð¸ÑÐ¿Ð¾Ð»ÑÐ·Ð¾Ð²Ð°Ð½Ð¸ÐµÐ¼ Ð°Ð´Ð´Ð¸ÑÐ¸Ð²Ð½ÑÑ ÑÐµÑ Ð½Ð¾Ð»Ð¾Ð³Ð¸Ð¹
title: ÑÑÐµÐ±Ð½Ð¸Ðº
titleType: Subtitle
title: Theoretical fundamentals of manufacturing products using additive technologies
Creators: name: Ð ÑÐ´ÑÐºÐ¾Ð¹, ÐÐ½Ð´ÑÐµÐ¹
name: ÐÐ¾Ð¿Ð¾Ð²Ð¸Ñ, ÐÐ½Ð°ÑÐ¾Ð»Ð¸Ð¹
Publisher: name: ÐÐÐÐÐ¢ÐÐ¥-ÐÐ ÐÐ¡Ð¡
Year: 2024
Subjects: ÐÐ¾Ð¼Ð¿Ð¾Ð·Ð¸ÑÐ¸Ð¾Ð½Ð½ÑÐµ Ð¼Ð°ÑÐµÑÐ¸Ð°Ð»Ñ Ð¿Ð¾ÑÐ¾ÑÐºÐ¾Ð²ÑÐµ
ÐÐ°ÑÐµÑÐ¸Ð°Ð»Ð¾Ð²ÐµÐ´ÐµÐ½Ð¸Ðµ

description: Ð ÑÑÐµÐ±Ð½Ð¸ÐºÐµ Ð¿ÑÐµÐ´ÑÑÐ°Ð²Ð»ÐµÐ½Ñ ÑÐµÐ¾ÑÐµÑÐ¸ÑÐµÑÐºÐ¸Ðµ Ð¾ÑÐ½Ð¾Ð²Ñ Ð¿ÑÐ¾Ð¸Ð·Ð²Ð¾Ð´ÑÑÐ²Ð° Ð¸Ð·Ð´ÐµÐ»Ð¸Ð¹ Ñ Ð¸ÑÐ¿Ð¾Ð»ÑÐ·Ð¾Ð²Ð°Ð½Ð¸ÐµÐ¼ Ð°Ð´Ð´Ð¸ÑÐ¸Ð²Ð½ÑÑ ÑÐµÑÐ½Ð¾Ð»Ð¾Ð³Ð¸Ð¹, Ð¿ÐµÑÐµÑÐ¸ÑÐ»ÐµÐ½Ñ Ð¾ÑÐ½Ð¾Ð²Ð½ÑÐµ ÐºÐ°ÑÐµÐ³Ð¾ÑÐ¸Ð¸ ÑÐµÑÐ½Ð¾Ð»Ð¾Ð³Ð¸ÑÐµÑÐºÐ¸Ñ Ð¿ÑÐ¾ÑÐµÑÑÐ¾Ð². ÐÐ·Ð»Ð¾Ð¶ÐµÐ½Ð° Ð¸Ð½ÑÐ¾ÑÐ¼Ð°ÑÐ¸Ñ Ð¾ Ð¿Ð¾Ð´Ð³Ð¾ÑÐ¾Ð²ÐºÐµ 3D-Ð¼Ð¾Ð´ÐµÐ»ÐµÐ¹, Ð¾Ð¿Ð¸ÑÐ°Ð½Ñ ÑÐµÑÐ½Ð¾Ð»Ð¾Ð³Ð¸ÑÐµÑÐºÐ¸Ðµ Ð¿ÑÐ¾ÑÐµÑÑÑ Ð°Ð´Ð´Ð¸ÑÐ¸Ð²Ð½Ð¾Ð³Ð¾ Ð¿ÑÐ¾Ð¸Ð·Ð²Ð¾Ð´ÑÑÐ²Ð°. Ð Ð°ÑÑÐ¼Ð¾ÑÑÐµÐ½Ñ Ð¾ÑÐ¾Ð±ÐµÐ½Ð½Ð¾ÑÑÐ¸ Ð¼ÑÐ»ÑÑÐ¸Ð¼Ð°ÑÐµÑÐ¸Ð°Ð»ÑÐ½Ð¾Ð³Ð¾ Ð°Ð´Ð´Ð¸ÑÐ¸Ð²Ð½Ð¾Ð³Ð¾ Ð¿ÑÐ¾Ð¸Ð·Ð²Ð¾Ð´ÑÑÐ²Ð°. Ð£ÑÐµÐ±Ð½Ð¸Ðº Ð¿ÑÐµÐ´Ð½Ð°Ð·Ð½Ð°ÑÐµÐ½ Ð´Ð»Ñ Ð¾Ð±ÑÑÐ°ÑÑÐ¸ÑÑÑ Ð¡ÐÐ Ð¸ ÑÐ°Ð·ÑÐ°Ð±Ð¾ÑÐ°Ð½ Ð² ÑÐ¾Ð¾ÑÐ²ÐµÑÑÑÐ²Ð¸Ð¸ Ñ Ð¤ÐÐÐ¡ Ð¡ÐÐ Ð¿Ð¾ ÑÐ¿ÐµÑÐ¸Ð°Ð»ÑÐ½Ð¾ÑÑÐ¸ 15.02.09 Â«ÐÐ´Ð´Ð¸ÑÐ¸Ð²Ð½ÑÐµ ÑÐµÑÐ½Ð¾Ð»Ð¾Ð³Ð¸Ð¸Â» Ð¾Ñ 22 Ð´ÐµÐºÐ°Ð±ÑÑ 2015 Ð³. â 1506 Ð¸ Ð¿ÑÐ¾ÑÐµÑÑÐ¸Ð¾Ð½Ð°Ð»ÑÐ½ÑÐ¼ ÑÑÐ°Ð½Ð´Ð°ÑÑÐ¾Ð¼ Â«Ð¡Ð¿ÐµÑÐ¸Ð°Ð»Ð¸ÑÑ Ð¿Ð¾ Ð°Ð´Ð´Ð¸ÑÐ¸Ð²Ð½ÑÐ¼ ÑÐµÑÐ½Ð¾Ð»Ð¾Ð³Ð¸ÑÐ¼Â» Ð¾Ñ 5 Ð¾ÐºÑÑÐ±ÑÑ 2020 Ð³. â 697Ð½.
description: The textbook presents the theoretical fundamentals of manufacturing products using additive technologies, lists the main categories of technological processes. The authors present information about the preparation of 3D models, describe technological processes of additive manufacturing, consider the peculiarities of multi-material additive manufacturing. The textbook is intended for students of secondary vocational education and is developed in accordance with the federal state educational standard of secondary vocational education for the major 15.02.09 Â«Additive TechnologiesÂ» of December 22, 2015 No. 1506 and professional standard Â«Specialist in additive technologiesÂ» of October 5, 2020 No. 697n.
Analysis of water uses on large river basin u s i n g M I K E BASIN model (case study of Abbay b a s i n )
Creators: name: Fasikaw Dessie Wubet
Publisher: name: Zenodo
Year: 2008

description: This study was conducted to Simulate water allocation for major production

activities (existing and planned) in the Abbay basin

The study has also assess the impacts of upstream water allocation on

downstream users.

The reduction of flow at the border due to the implementation of the projects as

compared to the existing mean annual flow of the river was also computed.

Based on the accepted net irrigable area and installed capacity on the master

plan documents, 1 7 irrigation projects covering an area of 220,416 ha of land

and 4,800MW hydropower projects on the main stream have been included in

the analysis. From the analysis the total water extracted for these irrigation

projects was estimated as 1.624Billion cubic meter annually. The border flow

volume reduction as a result of the implementation of these irrigation projects

during the reservoir added scenario is only 3.04% of the estimated mean annual

flow of 50.45 billion cubic meters.
Many-body Green's function approaches to the doped Fröhlich solid: Exact solutions and anomalous mass enhancement
Creators: name: Kandolf, Nikolaus
name: Verdi, Carla
name: Giustino, Feliciano
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: In polar semiconductors and insulators, the Fröhlich interaction between electrons and long-wavelength longitudinal optical phonons induces a many-body renormalization of the carrier effective masses and the appearence of characteristic phonon sidebands in the spectral function, commonly dubbed 'polaron satellites'. The simplest model that captures these effects is the Fröhlich model, whereby electrons in a parabolic band interact with a dispersionless longitudinal optical phonon. The Fröhlich model has been employed in a number of seminal papers, from early perturbation-theory approaches to modern diagrammatic Monte Carlo calculations. One limitation of this model is that it focuses on undoped systems, thus ignoring carrier screening and Pauli blocking effects that are present in real experiments on doped samples. To overcome this limitation, we here extend the Fröhlich model to the case of doped systems, and we provide exact solutions for the electron spectral function, mass enhancement, and polaron satellites. We perform the analysis using two approaches, namely Dyson's equation with the Fan-Migdal self-energy, and the second-order cumulant expansion. We find that these two approaches provide qualitatively different results. In particular, the Dyson's approach yields better quasiparticle masses and worse satellites, while the cumulant approach provides better satellite structures, at the price of worse quasiparticle masses. Both approaches yield an anomalous enhancement of the electron effective mass at finite doping levels, which in turn leads to a breakdown of the quasiparticle picture in a significant portion of the phase diagram.
description: 30 pages, 10 figures; accepted for publication in Physical Review B
Superconducting vortex-charge measurement using cavity electromechanics
Creators: name: Sahu, Sudhir Kumar
name: Mandal, Supriya
name: Ghosh, Sanat
name: Deshmukh, Mandar M.
name: Singh, Vibhor
Publisher: name: arXiv
Year: 2022
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: As the magnetic field penetrates the surface of a superconductor, it results in the formation of flux-vortices. It has been predicted that the flux-vortices will have a charged vortex core and create a dipolelike electric field. Such a charge trapping in vortices is particularly enhanced in high-T$_c$ superconductors (HTS). Here, we integrate a mechanical resonator made of a thin flake of HTS Bi$_2$Sr$_2$CaCu$_2$O$_{8+δ}$ into a microwave circuit to realize a cavity-electromechanical device. Due to the exquisite sensitivity of cavity-based devices to the external forces, we directly detect the charges in the flux-vortices by measuring the electromechanical response of the mechanical resonator. Our measurements reveal the strength of surface electric dipole moment due to a single vortex core to be approximately 30~$|e|a_B$, equivalent to a vortex charge per CuO$_2$ layer of $3.7\times 10^{-2}|e|$, where $a_B$ is the Bohr radius and $e$ is the electronic charge.
description: 7 pages, 4 figures and Supporting Information
Formalizing Expectations: The Duty to Consult and the Canadian Extractive Resource Sector
Creators: name: McQuade, Mikaela
Publisher: name: Faculty of Graduate Studies
Year: 2014

description: Recent news events surrounding natural resource development, such as protests by Aboriginal groups to hydraulic fracturing in New Brunswick, have brought to light the longstanding difficulties of reconciling Aboriginal rights with the greater Canadian public interest. Despite the undertaking of consultation policy and ancillary guidelines, Aboriginal groups, extractive industry proponents, and the Crown often find themselves embroiled in legal disputes over the expectations and responsibilities associated with natural resource development consultation. Ambiguities caused by policymaking direction from the Supreme Court have led to an inefficient allocation of time and resources by all parties involved in consultation processes, leading to a proliferation of legal challenges, a degradation of social license, increased costs associated with project delays, and a significant reduction in the competitiveness of Alberta’s extractive industry. To address inadequacies in current consultation policy, it is recommended that the provinces take a more proactive role in creating strong, detailed consultations policies that include strict deadlines and accountability measures. Though it will be made clear that the duty to fulfill the honour of the Crown in consultation matters rests solely with the government, it will also be recommended that the government continue to delegate procedural aspects of consultation to industry proponents on a project-specific basis. By formally divorcing the reconciliatory duty of the Crown from industry’s procedural obligations with strong provincial policy direction, the risks associated with current consultation uncertainty can be mitigated. These recommendations will be substantiated by referencing work completed by Douglas Eyford in his recent report to the federal government on forging partnerships and building relations with Aboriginal people in Canada in the context of natural resource development.
title: Правовая природа деловой репутации субъектов предпринимательской деятельности
title: The legal nature of business reputation of business entities
Creators: name: Абакумова, Екатерина Борисовна
Publisher: name: Издательский центр СурГУ
Year: 2020

description: Статья посвящена исследованию сущности и содержания понятия «деловая репутация», которое на сегодняшний день остается недостаточно разработанным как в теории гражданского права, так и на законодательном уровне. С критических позиций проанализированы существующие в научной литературе точки зрения по освещаемым проблемам и сделан вывод о двойственном характере правовой природы деловой репутации.
description: The article is devoted to the study of the essence and content of the concept “business reputation”. This concept remains today insufficiently developed both in the theory of civil law and in terms of legislation. The paper critically analyzes the existing points of view on highlighted issues in the scientific literature and concludes that the legal nature of the business reputation is dual.
Fine strand-like structure in the solar corona from MHD transverse oscillations
Creators: name: Antolin, P.
name: Yokoyama, T.
name: Van Doorsselaere, T.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Current analytical and numerical modelling suggest the existence of ubiquitous thin current sheets in the corona that could explain the observed heating requirements. On the other hand, new high resolution observations of the corona indicate that its magnetic field may tend to organise itself in fine strand-like structures of few hundred kilometres widths. The link between small structure in models and the observed widths of strand-like structure several orders of magnitude larger is still not clear. A popular theoretical scenario is the nanoflare model, in which each strand is the product of an ensemble of heating events. Here, we suggest an alternative mechanism for strand generation. Through forward modelling of 3D MHD simulations we show that small amplitude transverse MHD waves can lead in a few periods time to strand-like structure in loops in EUV intensity images. Our model is based on previous numerical work showing that transverse MHD oscillations can lead to Kelvin-Helmholtz instabilities that deform the cross-sectional area of loops. While previous work has focused on large amplitude oscillations, here we show that the instability can occur even for low wave amplitudes for long and thin loops, matching those presently observed in the corona. We show that the vortices generated from the instability are velocity sheared regions with enhanced emissivity hosting current sheets. Strands result as a complex combination of the vortices and the line-of-sight angle, last for timescales of a period and can be observed for spatial resolutions of a tenth of loop radius.
description: Accepted for publication in ApJL
Memory Replay with Data Compression for Continual Learning
Creators: name: Wang, Liyuan
name: Zhang, Xingxing
name: Yang, Kuo
name: Yu, Longhui
name: Li, Chongxuan
name: Hong, Lanqing
name: Zhang, Shifeng
name: Li, Zhenguo
name: Zhong, Yi
name: Zhu, Jun
Publisher: name: arXiv
Year: 2022
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Continual learning needs to overcome catastrophic forgetting of the past. Memory replay of representative old training samples has been shown as an effective solution, and achieves the state-of-the-art (SOTA) performance. However, existing work is mainly built on a small memory buffer containing a few original data, which cannot fully characterize the old data distribution. In this work, we propose memory replay with data compression (MRDC) to reduce the storage cost of old training samples and thus increase their amount that can be stored in the memory buffer. Observing that the trade-off between the quality and quantity of compressed data is highly nontrivial for the efficacy of memory replay, we propose a novel method based on determinantal point processes (DPPs) to efficiently determine an appropriate compression quality for currently-arrived training samples. In this way, using a naive data compression algorithm with a properly selected quality can largely boost recent strong baselines by saving more compressed data in a limited storage space. We extensively validate this across several benchmarks of class-incremental learning and in a realistic scenario of object detection for autonomous driving.
description: arXiv admin note: text overlap with arXiv:1207.6083 by other authors
Dynamics in the Schwarzschild isosceles three body problem
Creators: name: Arredondo, John A.
name: Perez-Chavela, Ernesto
name: Stoica, Cristina
Publisher: name: arXiv
Year: 2014
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics

description: The Schwarzschild potential, defined as U(r)=-A/r-B/r^3, where r is the distance between two mass points and A,B>0, models astrophysical and stellar dynamics systems in a classical context. In this paper we present a qualitative study of a three mass point system with mutual Schwarzschild interaction where the motion is restricted to isosceles configurations at all times. We retrieve the relative equilibria and provide the energy-momentum diagram. We further employ appropriate regularization transformations to analyse the behaviour of the flow near triple collision. We emphasize the distinct features of the Schwarzschild model when compared to its Newtonian counterpart. We prove that, in contrast to the Newtonian case, on any level of energy the measure of the set on initial conditions leading to triple collision is positive. Further, whereas in the Newtonian problem triple collision is asymptotically reached only for zero angular momentum, in the Schwarzschild problem the triple collision is possible for non-zero total angular momenta (e.g., when two of the mass points spin infinitely many times around the centre of mass). This phenomenon is known in celestial mechanics as the "black-hole effect" and it is understood as an analogue in the classical context of the behaviour near a Schwarzschild black hole. Also, while in the Newtonian problem all triple collision orbits are necessarily homothetic, in the Schwarzschild problem this is not necessarily true. In fact, in the Schwarzschild problem there exist triple collision orbits which are neither homothetic, nor homographic.
description: 33 pages, 7 figures
Alternate Level of Care: Challenges and barriers for those who wait the longest
Creators: name: Cornez, MacNeil
Publisher: name: Faculty of Graduate Studies
Year: 2016

description: Each year numerous Albertans are admitted to a hospital but upon discharge are no longer able to return home, despite efforts to provide adequate support. Of these individuals who require continuing care services, some will have care needs exceeding the services that are able to be provided in available LTC beds. When the appropriate continuing care services are not available individuals admitted to acute care hospitals (but no longer requiring their services) continue to occupy a bed and are classified as requiring an “alternate level of care” or ALC. This creates inefficiencies in the utilization of acute care resources, has multiple impacts across the entire healthcare system, and most importantly prohibits patients from receiving the appropriate care in the appropriate setting. In Alberta, between 2012 and 2015, there were an average of 2,706,571 hospital bed days per year; ALC days accounted for 10% of all hospital days in 2012-13, increasing to 12.2% in 2014-15. For the Calgary zone specifically, 15.2% of all 2014-15 hospital days were classified as ALC days this translates into approximately 330,201 Alberta hospital days classified as ALC in 2014-15. This is a stark contrast from previous years; from 2006- 08 ALC days accounted for only 2.2% of all hospital days. This represents an increase of 10 percentage points, or five times as many ALC days in 2014-15 compared to 2006-2008.
Discovery of pulsating components in eclipsing binary systems through the TESS light curves: The cases of CPD-30 740, HD 97329, V1637 Ori and TYC 683-640-1
Creators: name: Ulaş, Burak
name: Ulusoy, Ceren
name: Erkan, Naci
name: Madiba, Mothusi
name: Matsete, Mercy
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present the first evidence for the pulsations of primary components of four eclipsing binary systems. The TESS light curves of the targets are analyzed, the light and the absolute parameters are derived. Fourier analyses are applied to the residual data subtracted from the binary models to reveal the pulsational characteristics of the primaries. The components of the systems are compared to well-known binary systems of the same morphological type. The types of pulsational classes for the primaries are also discussed. Results show that CPD-30 740 and V1637 Ori are oscillating eclipsing Algol type binary stars, while HD 97329 and TYC 683-640-1 are found to be detached systems with pulsating primary components. We conclude that the primary components of the systems are pulsating stars.
description: Accepted for publication in Astrophysics and Space Science, 26 pages, 12 figures
Planet Hunters TESS IV: A massive, compact hierarchical triple star system TIC 470710327
Creators: name: Eisner, Nora L.
name: Johnston, Cole
name: Toonen, Silvia
name: Frost, Abigail J.
name: Janssens, Soetkin
name: Lintott, Chris J.
name: Aigrain, Suzanne
name: Sana, Hugues
name: Abdul-Masih, Michael
name: Arellano-Córdova, Karla Z.
name: Beck, Paul G.
name: Bordier, Emma
name: Canon, Emily
name: Escorza, Ana
name: Fabry, Mattias
name: Hermansson, Lars
name: Howell, Steve
name: Miller, Grant
name: Sheyte, Shreeya
name: Alhassan, Safaa
name: Baeten, Elisabeth M. L.
name: Barnet, Frank
name: Bean, Stewart. J.
name: Bernau, Mikael
name: Bundy, David M.
name: Di Fraia, Marco Z.
name: Emralino, Francis M.
name: Goodwin, Brian L.
name: Hermes, Pete
name: Hoffman, Tony
name: Huten, Marc
name: Janíček, Roman
name: Lee, Sam
name: Mazzucato, Michele T.
name: Rogers, David J.
name: Rout, Michael P.
name: Sejpka, Johann
name: Tanner, Christopher
name: Terentev, Ivan A.
name: Urvoy, David
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We report the discovery and analysis of a massive, compact, hierarchical triple system (TIC 470710327) initially identified by citizen scientists in data obtained by NASA's Transiting Exoplanet Survey Satellite (TESS). Spectroscopic follow-up observations obtained with the HERMES spectrograph, combined with eclipse timing variations (ETVs), confirm that the system is comprised of three OB stars, with a compact 1.10 d eclipsing binary and a non-eclipsing tertiary on a 52.04 d orbit. Dynamical modelling of the system (from radial velocity and ETVs) reveal a rare configuration wherein the tertiary star (O9.5-B0.5V; 14-17 M$_{\odot}$) is more massive than the combined mass of the inner binary (10.9-13.2 M$_{\odot}$). Given the high mass of the tertiary, we predict that this system will undergo multiple phases of mass transfer in the future, and likely end up as a double neutron star gravitational wave progenitor or an exotic Thorne-Zytkow object. Further observational characterisation of this system promises constraints on both formation scenarios of massive stars as well as their exotic evolutionary end-products.
description: Accepted for publication in MNRAS (11 pages, 8 figures)
Testing the Cosmological Principle: Astrometric Limits on Systemic Motion of Quasars at Different Cosmological Epochs
Creators: name: Makarov, Valeri V.
name: Secrest, Nathan J.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: A sample of $60,410$ bona fide optical quasars with astrometric proper motions in Gaia EDR3 and spectroscopic redshifts above 0.5 in an oval 8400 square degree area of the sky is constructed. Using orthogonal Zernike functions of polar coordinates, the proper motion fields are fitted in a weighted least-squares adjustment of the entire sample and of six equal bins of sorted redshifts. The overall fit with 37 Zernike functions reveals a statistically significant pattern, which is likely to be of instrumental origin. The main feature of this pattern is a chain of peaks and dips mostly in the R.A. component with an amplitude of 25~$μ$as yr$^{-1}$. This field is subtracted from each of the six analogous fits for quasars grouped by redshifts covering the range 0.5 through 7.03, with median values 0.72, 1.00, 1.25, 1.52, 1.83, 2.34. The resulting residual patterns are noisier, with formal uncertainties up to 8~$μ$as yr$^{-1}$ in the central part of the area. We detect a single high-confidence Zernike term for R.A. proper motion components of quasars with redshifts around 1.52 representing a general gradient of 30 $μ$as yr$^{-1}$ over $150\degr$ on the sky. We do not find any small- or medium-scale systemic variations of the residual proper motion field as functions of redshift above the $2.5\,σ$ significance level.
description: Accepted in ApJL
Observations of PAHs in the atmospheres of discs and exoplanets
Creators: name: Ercolano, Barbara
name: Rab, Christian
name: Molaverdikhani, Karan
name: Edwards, Billy
name: Preibisch, Thomas
name: Testi, Leonardo
name: Kamp, Inga
name: Thi, Wing-Fai
Publisher: name: arXiv
Year: 2022
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Polycyclic aromatic hydrocarbons (PAHs) play a key role in the chemical and hydrodynamical evolution of the atmospheres of exoplanets and planet-forming discs. If they can survive the planet formation process, PAHs are likely to be involved in pre-biotic chemical reactions eventually leading to more complex molecules such as amino acids and nucleotides, which form the basis for life as we know it. However, the abundance and specific role of PAHs in these environments is largely unknown due to limitations in sensitivity and range of wavelength of current and previous space-borne facilities. Upcoming infrared space spectroscopy missions, such as Twinkle and Ariel, present a unique opportunity to detect PAHs in the atmospheres of exoplanets and planet-forming discs. In this work we present synthetic observations based on conservative numerical modeling of typical planet-forming discs and a transiting hot Saturnian planet around solar type star. Our models show that Twinkle and Ariel might both be able to detect the 3.3 micron PAH feature within reasonable observing time in discs and transiting planets, assuming that PAHs are present with an abundance of at least one tenth of the interstellar medium value.
description: 11 pages, 9 figures, accepted for publication in MNRAS
The peculiar chemical abundance of the transitional millisecond pulsar PSR J1023+0038 -- Li enhancement
Creators: name: Shahbaz, T.
name: Gonzalez-Hernandez, J. I.
name: Breton, R. P.
name: Kennedy, M. R.
name: Sanchez, D. Mata
name: Linares, M.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Using high-resolution optical spectroscopy we determine the chemical abundance of the secondary star in the binary millisecond pulsar PSR J1023+0038. We measure a metallicity of [Fe/H] = 0.48 +/- 0.04 which is higher than the Solar value and in general find that the element abundances are different compared to the secondary stars in X-ray binaries and stars in the solar neighbourhood of similar Fe content. Our results suggest that the pulsar was formed in a supernova explosion. We find that supernova models, where matter that has been processed in the supernova is captured by the secondary star leading to abundance anomalies, qualitatively agree with the observations. We measure Li abundance of A(Li) = 3.66 +/- 0.20, which is anomalously high compared to the Li abundance of stars with the same effective temperature, irrespective of the age of the system. Furthermore, the Li abundance in PSR J1023+0038 is higher than the Cosmic value and what is observed in young Population I stars and so provides unambiguous evidence for fresh Li production. The most likely explanation is the interaction of high energy gamma-rays or relativistic protons from the pulsar wind or intrabinary shock with the CNO nuclei in the secondary star's atmosphere via spallation which leads to substantial Li enrichment in the secondary star's atmosphere.
description: Accepted for publication in Monthly Notices of the Royal Astronomical Society. 19 pages, 12 figures
The VMC survey -- XLVII. Turbulence-Controlled Hierarchical Star Formation in the Large Magellanic Cloud
Creators: name: Miller, Amy E.
name: Cioni, Maria-Rosa L.
name: de Grijs, Richard
name: Sun, Ning-Chen
name: Bell, Cameron P. M.
name: Choudhury, Samyaday
name: Ivanov, Valentin D.
name: Marconi, Marcella
name: Oliveira, Joana
name: Petr-Gotzens, Monika
name: Ripepi, Vincenzo
name: van Loon, Jacco Th.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We perform a statistical clustering analysis of upper main-sequence stars in the Large Magellanic Cloud (LMC) using data from the Visible and Infrared Survey Telescope for Astronomy survey of the Magellanic Clouds. We map over 2500 young stellar structures at 15 significance levels across ~120 square degrees centred on the LMC. The structures have sizes ranging from a few parsecs to over 1 kpc. We find that the young structures follow power-law size and mass distributions. From the perimeter-area relation, we derive a perimeter-area dimension of 1.44+-0.20. From the mass-size relation and the size distribution, we derive two-dimensional fractal dimensions of 1.50+-0.10 and 1.61+-0.20, respectively. We find that the surface density distribution is well-represented by a lognormal distribution. We apply the Larson relation to estimate the velocity dispersions and crossing times of these structures. Our results indicate that the fractal nature of the young stellar structures has been inherited from the gas clouds from which they form and that this architecture is generated by supersonic turbulence. Our results also suggest that star formation in the LMC is scale-free from 10 pc to 700 pc.
description: 20 pages, 17 figures, accepted for publication in MNRAS
On the Application of Differential Evolution to the Analysis of X-Ray Spectra
Creators: name: Kepa, Anna
name: Sylwester, Barbara
name: Siarkowski, Marek
name: Sylwester, Janusz
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Using methods of differential evolution (DE,) we determined the coronal elemental abundances and the differential emission measure (DEM) distributions for the plasma flaring on 2003 January 21. The analyses have been based on RESIK X-ray spectra. DE belongs to the family of evolutionary algorithms. DE is conceptually simple and easy to be implemented, so it has been applied to solve many problems in science and engineering. In this study we apply this method in a new context: simultaneous determination of plasma composition and DEM . In order to increase the confidence in the results obtained using DE, we tested the use of its algorithms by comparing the DE synthesized spectra with respective spectra observed by RESIK. Extensive discussion of the DE method used and the obtained physical characteristics of flaring plasma is presented.
Online Supplemental Data - Worsening of Lung Perfusion to Tissue Density Distributions during Early Acute Lung Injury at Different Physiological Conditions
Creators: name: Motta Ribeiro, Gabriel
name: Winkler, Tilo
name: Costa, Eduardo Leite Vieira
name: de Prost, Nicolas
name: Tucci, Mauro R.
name: Vidal Melo, Marcos Francisco
Publisher: name: figshare
Year: 2023
Subjects: Biomedical imaging
Intensive care

description: This document provides extended methods and results for the research paper "Worsening of Lung Perfusion to Tissue Density Distributions during Early Acute Lung Injury at Different Physiological Conditions" published in the Journal of Applied Physiology
Infinitesimal time reparametrisation and its applications
Creators: name: Cariñena, José F.
name: Martínez, Eduardo
name: Muñoz-Lecanda, Miguel C.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 34A34, 37N05, 53C15, 70F16

description: A geometric approach to Sundman infinitesimal time-reparametrisation is given and some of its applications are used to illustrate the general theory. Special emphasis is put on geodesic motions and systems described by mechanical type Lagrangians. The Jacobi metric appears as a particular case of a Sundman transformation.
description: To appear in Journal of Nonlinear Mathematical Physics
The SAMI Galaxy Survey: the difference between ionised gas and stellar velocity dispersions
Creators: name: Oh, Sree
name: Colless, Matthew
name: D'Eugenio, Francesco
name: Croom, Scott M.
name: Cortese, Luca
name: Groves, Brent
name: Kewley, Lisa J.
name: van de Sande, Jesse
name: Zovaro, Henry
name: Varidel, Mathew R.
name: Barsanti, Stefania
name: Brough, Sarah
name: Bryant, Julia J.
name: Casura, Sarah
name: Lawrence, Jon S.
name: Lorente, Nuria P. F.
name: Medling, Anne M.
name: Owers, Matt S.
name: Yi, Sukyoung K.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We investigate the mean locally-measured velocity dispersions of ionised gas ($σ_{\rm gas}$) and stars ($σ_*$) for 1090 galaxies with stellar masses $\log\,(M_*/M_{\odot}) \geq 9.5$ from the SAMI Galaxy Survey. For star-forming galaxies, $σ_*$ tends to be larger than $σ_{\rm gas}$, suggesting that stars are in general dynamically hotter than the ionised gas (asymmetric drift). The difference between $σ_{\rm gas}$ and $σ_*$ ($Δσ$) correlates with various galaxy properties. We establish that the strongest correlation of $Δσ$ is with beam smearing, which inflates $σ_{\rm gas}$ more than $σ_*$, introducing a dependence of $Δσ$ on both the effective radius relative to the point spread function and velocity gradients. The second-strongest correlation is with the contribution of active galactic nuclei (AGN) (or evolved stars) to the ionised gas emission, implying the gas velocity dispersion is strongly affected by the power source. In contrast, using the velocity dispersion measured from integrated spectra ($σ_{\rm aper}$) results in less correlation between the aperture-based $Δσ$ ($Δσ_{\rm aper}$) and the power source. This suggests that the AGN (or old stars) dynamically heat the gas without causing significant deviations from dynamical equilibrium. Although the variation of $Δσ_{\rm aper}$ is much smaller than that of $Δσ$, a correlation between $Δσ_{\rm aper}$ and gas velocity gradient is still detected, implying there is a small bias in dynamical masses derived from stellar and ionised gas velocity dispersions.
description: 18 pages, 13 figures
Low-Metallicity Globular Clusters in the Low-Mass Isolated Spiral Galaxy NGC 2403
Creators: name: Forbes, Duncan A.
name: Ferré-Mateu, Anna
name: Gannon, Jonah S.
name: Romanowsky, Aaron J.
name: Carlin, Jeffrey L.
name: Brodie, Jean P.
name: Day, Jacob
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The globular cluster (GC) systems of low-mass late-type galaxies, such as NGC 2403, have been poorly studied to date. As a low mass galaxy (M$_{\ast}$ = 7 $\times$ 10$^{9}$ M$_{\odot}$), cosmological simulations predict NGC 2403 to contain few, if any, accreted GCs. It is also isolated, with a remarkably undisturbed HI disk. Based on candidates from the literature, Sloan Digital Sky Survey and Hyper Suprime-Cam imaging, we selected several GCs for follow-up spectroscopy using the Keck Cosmic Web Imager. From their radial velocities, and other properties, we identify 8 bona-fide GCs associated with either the inner halo or the disk of this bulgeless galaxy. A stellar population analysis suggests a wide range of GC ages from shortly after the Big Bang until the present day. We find all of the old GCs to be metal-poor with [Fe/H] $\le$ --1. The age--metallicity relation for the observed GCs suggests that they were formed over many Gyr from gas with a low effective yield, similar to that observed in the SMC. Outflows of enriched material may have contributed to the low yield. With a total system of $\sim$50 GCs expected, our study is the first step in fully mapping the star cluster history of NGC 2403 in both space and time.
description: 9 pages, 7 figures, accepted for publication in MNRAS
Unveiling the Main Sequence to Starburst Transition Region with a Sample of Intermediate Redshift Luminous Infrared Galaxies
Creators: name: Hogan, L.
name: Rigopoulou, D.
name: García-Burillo, S.
name: Alonso-Herrero, A.
name: Barrufet, L.
name: Combes, F.
name: García-Bernete, I.
name: Magdis, G. E.
name: Pereira-Santaella, M.
name: Thatte, N.
name: Weiß, A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present a CO(3-2) study of four systems composed of six (ultra) luminous infrared galaxies (U/LIRGs), located at 0.28 < z < 0.44, that straddle the transition region between regular star forming galaxies and starbursts. These galaxies benefit from previous multi-wavelength analysis allowing in depth exploration of an understudied population of U/LIRGs at a time when the universe is experiencing a rapid decline in star formation rate density. We detect CO(3-2) emission in four targets and these galaxies fall between the loci of regular star forming galaxies and starbursts on the Kennicutt-Schmidtt relation. Compared to low luminosity LIRGs and high luminosity ULIRGs at similar redshifts, we find they all have similar molecular gas budgets with the difference in their star formation rates (SFR) driven by the star formation efficiency (SFE). This suggests that at these redshifts large molecular gas reservoirs must coincide with an increased SFE to transition a galaxy into the starburst regime. We studied the structure and kinematics and found our four detections are either interacting or have disturbed morphology which may be driving the SFE. One of the CO(3-2) non-detections has a strong continuum detection, and has been previously observed in H$α$, suggesting an unusual interstellar medium for a ULIRG. We conclude that our sample of transitioning U/LIRGs fill the gap between regular star forming galaxies and starbursts, suggest a continuous change in SFE between these two populations and the increased SFE may be driven by morphology and differing stages of interaction.
description: 19 pages, 17 figures, accepted for publication in MNRAS
Gamma-Ray Polarimetry of the Crab Pulsar Observed by POLAR
Creators: name: Li, Han-Cheng
name: Produit, Nicolas
name: Zhang, Shuang-Nan
name: Kole, Merlin
name: Sun, Jian-Chao
name: Ge, Ming-Yu
name: De Angelis, Nicolas
name: Hulsman, Johannes
name: Li, Zheng-Heng
name: Song, Li-Ming
name: Tymieniecka, Teresa
name: Wu, Bo-Bing
name: Wu, Xin
name: Wang, Yuan-Hao
name: Xiong, Shao-Lin
name: Zhang, Yong-Jie
name: Zhao, Yi
name: Zheng, Shi-Jie
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: The X/$γ$ ray polarimetry of the Crab pulsar/nebula is believed to hold crucial information on their emission models. In the past, several missions have shown evidence of polarized emission from the Crab. The significance of these measurements remains however limited. New measurements are therefore required. POLAR is a wide Field of View Compton-scattering polarimeter (sensitive in 50-500 keV) onboard the Chinese spacelab Tiangong-2 which took data from September 2016 to April 2017. Although not designed to perform polarization measurements of pulsars, we present here a novel method which can be applied to POLAR as well as that of other wide Field of View polarimeters. The novel polarimetric joint-fitting method for the Crab pulsar observations with POLAR, allows us to obtain constraining measurements of the pulsar component. The best fitted values and corresponding 1$σ$ deviations for the averaged phase interval: (PD=$14\substack{+15 \\ -10}$\%, PA=$108\substack{+33 \\ -54} ^{\circ}$), for Peak 1: (PD=$17\substack{+18 \\ -12}$\%, PA=$174\substack{+39 \\ -36} ^{\circ}$) and for Peak 2: (PD=$16\substack{+16 \\ -11}$\%, PA=$78\substack{+39 \\ -30} ^{\circ}$). Further more, the 3$σ$ upper limits on the polarization degree are for the averaged phase interval (55\%), Peak 1 (66\%) and Peak 2 (57\%). Finally, to illustrate the capabilities of this method in the future, we simulated two years observation to the Crab pulsar with POLAR-2. The results show that POLAR-2 is able to confirm the emission to be polarized with $5σ$ and $4σ$ confidence level if the Crab pulsar is polarized at $20\%$ and $10\%$ respectively.
description: 14 pages, 18 figures, 2 tables; accepted for publication in MNRAS
Untersuchungen zur aktuellen Laufkäferfauna (Coleoptera: Carabidae) des ehemaligen Salzigen Sees im Mansfelder Land (Sachsen-Anhalt)
Creators: name: Trost, Martin
name: Schnitter, Peer Hajo
name: Grill, Erhard
Publisher: name: Hercynia - Ökologie und Umwelhttp://ojs-dev.bibliothek.uni-halle.de/index.php/hercynia/workflow/access/1513t in Mitteleuropa
Year: 1999
Subjects: subject: 000

description: Between the years 1993 and 1998 through studies of the carabid fauna in the vicinity of the former IakeSalziger See ("Satt Lake") in the Mausfeld district (Sachsen-Anhalt) were carried out by the means ofpitfall traps and catches by hand. This paper presents the carabid assemblages of the various currentlypresent habitat types. The species composition as weil as phenological aspects are comparatively describedand substantial habitat qualities are characterized. On the basis of the carabid fauna an assessmentof habitat types from the point of view of nature conservation is proposed.The carabid assemblages of the various distinguished habitat types differ clearly, mainly correspondingto the moisture of the site. Additional habitat qualities, such as salinity and vegetation structure,have a distinct influence. The area of the former Iake, until recently subject to intensive changes, ischaracterized by considerable dynamic of site features and carabid communities. Regional specificsare due to the Jocation of the area in the Central German dry area. Of special significance for speciesconservation are salt habitats, riparian zones as weil as wet areas in general, and xerothermic habitats.The area, which as a whole is very species-rich is of importance beyond the region because of theoccurrence of rare and very restricted species, respectively.
Nested spheroidal figures of equilibrium II. Generalization to L layers
Creators: name: Huré, Jean-Marc
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: We present a vectorial formalism to determine the approximate solutions to the problem of a composite body made of $L$ homogeneous, rigidly rotating layers bounded by spheroidal surfaces. The method is based on the 1st-order expansion of the gravitational potential over confocal parameters, thereby generalizing the method described in Paper I for $L=2$. For a given relative geometry of the ellipses and a given set of mass-density jumps at the interfaces, the sequence of rotation rates and interface pressures is obtained analytically by recursion. A wide range of equilibria result when layers rotate in an asynchronous manner, although configurations with a negative oblateness gradient are more favorable. In contrast, states of global rotation (all layers move at the same rate), found by solving a linear system of $L-1$ equations, are much more constrained. In this case, we mathematically demonstrate that confocal and coelliptical configurations are not permitted. Approximate formula for small ellipticities are derived. These results reinforce and prolongate known results and classical theorems restricted to small elliptiticities. Comparisons with the numerical solutions computed from the Self-Consistent-Field method are successful.
description: Accepted for publication in MNRAS