bluuebunny/crossref_metadata_2025_split huggingface dataset:
Results of 12 yr of Pulsar Timing at Nanshan. I.
Authors: Dang S. J. , Yuan J. P. , Manchester R. N. , Li L. , Wang N. , Wang J. B. , Hobbs G. , Liu Z. Y. , Kou F. F. 
Published: June 2020

Abstract
We have used the Nanshan 25 m Radio Telescope at Xinjiang Astronomical Observatory to obtain timing observations of 87 pulsars from 2002 July to 2014 March. Using the “Cholesky” timing analysis method we have determined positions and proper motions for 48 pulsars, 24 of which are improved positions compared to previously published values. We also present the first published proper motions for nine pulsars and improved proper motions for 21 pulsars using the pulsar timing and position-comparison method. The pulsar rotation parameters are derived and are more accurate than previously published values for 36 pulsars. Glitches are detected in three pulsars: PSRs J1722−3632, J1852−0635, and J1957+2831. For the first two, the glitches are large, with Δν

g
/ν > 10−6, and they are the first detected glitches in these pulsars. PSR J1722−3632 is the second oldest pulsar, with a large glitch. For the middle-age pulsars (τ

c
> 105 yr), the calculated braking indices,

, are strongly correlated with τ

c
and the numbers of positive and negative values of n are almost equal. For young pulsars (τ

c
< 105 yr), there is no correlation between

and τ

c
and most have n > 0.
Photospheric Polarization Signatures from Long Gamma-Ray Burst Simulations
Authors: Parsotan Tyler , López-Cámara Diego , Lazzati Davide 
Published: June 2020

Abstract
A comprehensive understanding of gamma-ray bursts (GRBs) has been elusive due to the variety of questions surrounding the radiation mechanism at play in these events. Polarization measurements of GRBs can heavily constrain the relevant radiation mechanisms and the structure of the GRB jet; however, there is a limited number of theoretical predictions that observed GRB polarizations can be compared against. Here, we conduct radiative transfer calculations of a set of two-dimensional relativistic hydrodynamic long GRB (LGRB) jet simulations, of a constant and a variable jet, using the Monte Carlo Radiation Transport (MCRaT) code. MCRaT has been enhanced by the inclusion of polarization; it has been first verified by reproducing a variety of results in the literature and then used to obtain the time-integrated and time-resolved polarization degrees and angles of the synthetic LGRBs. While the obtained time-integrated polarization degrees (≲1%) are consistent with the constraints from the POLAR experiment, they are lower than other theoretical studies due to the lack of strong gradients in the model jet profiles that we use. The time-resolved results suggests that GRBs with wide jets observed on axis will have small polarization degrees (≲2%) and constant polarization angles, during the brightest portion of the light curve. GRBs observed off-axis will have larger polarization degrees and polarization angles that change with the temporal structure of radiating shells in the outflow. We then place our results in the context of GRB prompt emission models and future LEAP and POLAR-2 GRB polarimetry detections.
The Hills Mechanism and the Galactic Center S-stars
Authors: Generozov Aleksey , Madigan Ann-Marie 
Published: June 2020

Abstract
Our Galactic center contains young stars, including the few million year-old clockwise disk between 0.05 and 0.5 pc from the Galactic center and the S-star cluster of B-type stars at a galactocentric distance of 0.01 pc. Recent observations suggest the S-stars are remnants of tidally disrupted binaries from the clockwise disk. In particular, Koposov et al. discovered a hypervelocity star that was ejected from the Galactic center 5 Myr ago with a velocity vector consistent with the disk. We perform a detailed study of this binary disruption scenario. First, we quantify the plausible range of binary semimajor axes in the disk. Dynamical evaporation of such binaries is dominated by other disk stars rather than by the isotropic stellar population. For the expected range of semimajor axes in the disk, binary tidal disruptions can reproduce the observed S-star semimajor axis distribution. Reproducing the observed thermal eccentricity distribution of the S-stars requires an additional relaxation process. The flight time of the Koposov star suggests that this process must be effective within 10 Myr. We consider three possibilities: (i) scalar resonant relaxation from the observed isotropic star cluster, (ii) torques from the clockwise disk, and (iii) an intermediate-mass black hole. We conclude that the first and third mechanisms are fast enough to reproduce the observed S-star eccentricity distribution. Finally, we show that the primary star from an unequal-mass binary would be deposited at larger semimajor axes than the secondary, possibly explaining the dearth of O stars among the S-stars.
Detection of Repeating FRB 180916.J0158+65 Down to Frequencies of 300 MHz
Authors: Chawla P. , Andersen B. C. , Bhardwaj M. , Fonseca E. , Josephy A. , Kaspi V. M. , Michilli D. , Pleunis Z. , Bandura K. M. , Bassa C. G. , Boyle P. J. , Brar C. , Cassanelli T. , Cubranic D. , Dobbs M. , Dong F. Q. , Gaensler B. M. , Good D. C. , Hessels J. W. T. , Landecker T. L. , Leung C. , Li D. Z. , Lin H.-. H. , Masui K. , Mckinven R. , Mena-Parra J. , Merryfield M. , Meyers B. W. , Naidu A. , Ng C. , Patel C. , Rafiei-Ravandi M. , Rahman M. , Sanghavi P. , Scholz P. , Shin K. , Smith K. M. , Stairs I. H. , Tendulkar S. P. , Vanderlinde K. 
Published: June 2020

Abstract
We report on the detection of seven bursts from the periodically active, repeating fast radio burst (FRB) source FRB 180916.J0158+65 in the 300–400 MHz frequency range with the Green Bank Telescope (GBT). Emission in multiple bursts is visible down to the bottom of the GBT band, suggesting that the cutoff frequency (if it exists) for FRB emission is lower than 300 MHz. Observations were conducted during predicted periods of activity of the source, and had simultaneous coverage with the Low Frequency Array (LOFAR) and the FRB backend on the Canadian Hydrogen Intensity Mapping Experiment (CHIME) telescope. We find that one of the GBT-detected bursts has potentially associated emission in the CHIME band (400–800 MHz) but we detect no bursts in the LOFAR band (110–190 MHz), placing a limit of

on the spectral index of broadband emission from the source. We also find that emission from the source is severely band-limited with burst bandwidths as low as ∼40 MHz. In addition, we place the strictest constraint on observable scattering of the source, <1.7 ms at 350 MHz, suggesting that the circumburst environment does not have strong scattering properties. Additionally, knowing that the circumburst environment is optically thin to free–free absorption at 300 MHz, we find evidence against the association of a hyper-compact H ii region or a young supernova remnant (age <50 yr) with the source.
A Radiatively Quiet Glitch and Anti-glitch in the Magnetar 1E 2259+586
Authors: Younes George , Ray Paul S. , Baring Matthew G. , Kouveliotou Chryssa , Fletcher Corinne , Wadiasingh Zorawar , Harding Alice K. , Goldstein Adam 
Published: June 2020

Abstract
We report on the timing and spectral properties of the soft X-ray emission from the magnetar 1E 2259+586 from 2013 January, ∼8 months after the detection of an anti-glitch, until 2019 September, using the Neil Gehrels Swift and Neutron star Interior Composition ExploreR (NICER) observatories. During this time span, we detect two timing discontinuities. The first, occurring around 5 yr after the 2012 April anti-glitch, is a relatively large spin-up glitch with a fractional amplitude

. We find no evidence for flux enhancement or change in the spectral or pulse-profile shape around the time of this glitch. This is consistent with the picture that a significant number of magnetar spin-up glitches are radiatively quiet. Approximately 1.5 yr later in 2019 April, 1E 2259+586 exhibited an anti-glitch with spin-down of a fractional amplitude

, similar to the fractional change detected in 2012. We do not, however, detect any change to the pulse-profile shape or increase in the rms pulsed flux of the source, nor do we see any possible bursts from its direction around the time of the anti-glitch, all of which occurred during the 2012 event. Hence, similar to spin-up glitches, anti-glitches can occur silently. This may suggest that these phenomena originate in the neutron star interior, and that their locale and triggering mechanism do not necessarily have to be connected to the magnetosphere. Last, our observations suggest that the occurrence rate of spin-up and spin-down glitches is about the same in 1E 2259+586, with the former having a larger net fractional change.
Halo Environment for Population III Star Formation
Authors: Grace Justin , O’Shea Brian W. , Wise John H. 
Published: June 2020

Abstract
We analyze the environmental features and growth history of high-redshift halos from cosmological simulation data to determine the conditions that lead to Population III star formation. We use support-vector classification (SVC) to determine the separation in feature-space between Population III halos and halos that form no stars. We perform hyperparameter tuning but are unable to produce an SVC model that reliably classifies Population III halos. We perform feature selection and determine that among our included features, Lyman–Werner radiation and halo mass have the most significant impact on an SVC model's effectiveness.
Diffraction-limited Titan Surface Imaging from Orbit Using Near-infrared Atmospheric Windows
Authors: Barnes Jason W. , MacKenzie Shannon M. , Young Eliot F. , Soderblom Jason M. , Hayes Alexander G. , Sotin Christophe , Brown Robert H. , Soderblom Laurence A. 
Published: June 2020

Abstract
The selection of Dragonfly enables regional Titan surface science, but global Titan geophysics, geology, hydrology, and meteorology require an orbiter. We consider the sources of signal and noise that would contribute to near-infrared surface imaging from such an orbiter both analytically and numerically. The fraction of light arriving at an orbiting camera directly from Titan’s surface, and therefore conveying full-resolution surface information, decreases at shorter wavelengths as additive atmospheric scatter and light blurred on the way out increase with higher haze optical depths. We apply the Monte Carlo radiative transfer model SRTC++ and show that up to 75% of observed flux in Titan’s 5 μm window comes directly from the surface, up to 47% comes directly at 2 μm, and up to just 7% comes directly in the 0.94 μm window. We find that diffraction-limited surface imaging with 10 m pixels is possible with a signal-to-noise ratio for surface features of 100 in the near-infrared at 5 and 2 μm using a 50 cm aperture. A Titan orbiter camera could image in color using 5 μm, 2 μm, and potentially other wavelengths using a pushbroom strategy with time-delay integration.
Composition and Size Dependent Sorting in Preplanetary Growth: Seeding the Formation of Mercury-like Planets
Authors: Kruss Maximilian , Wurm Gerhard 
Published: June 2020

Abstract
In an earlier work, we found that large metallic iron fractions in dust aggregates and strong magnetic fields boost preplanetary growth. This sets an initial bias for the formation of Mercury-like planets in the inner part of protoplanetary disks. We extended these experiments here by adding pure quartz aggregates to the iron-rich aggregates. Magnetic boost still leads to the formation of larger clusters of aggregates. These clusters now include silicate aggregates, which can also be connecting bridges between chains. However, at least a certain fraction of iron-rich aggregates are needed to trigger magnetic boost. Without a magnetic field, the sticking properties of the aggregates and their constituents determine the composition of clusters of a given size. This introduces a new fractionation and sorting mechanism by cluster formation at the bouncing barrier.
Dynamical History of the Uranian System
Authors: Ćuk Matija , El Moutamid Maryame , Tiscareno Matthew S. 
Published: June 2020

Abstract
We numerically simulate the past tidal evolution of the five large moons of Uranus (Miranda, Ariel, Umbriel, Titania, and Oberon). We find that the most recent major mean–motion resonance (MMR) between any two moons, the Ariel–Umbriel 5:3 MMR, had a large effect on the whole system. Our results suggest that this resonance is responsible for the current 4.°3 inclination of Miranda (instead of the previously proposed 3:1 Miranda–Umbriel MMR), and that all five moons had their inclinations excited during this resonance. Miranda experienced significant tidal heating during the Ariel–Umbriel 5:3 MMR, due to its eccentricity being excited by Ariel’s secular perturbations. This tidal heating draws energy from the shrinking of Miranda’s orbit, rather than Ariel’s outward evolution, and can generate heat flows in excess of 100 mW m−2, sufficient to produce young coronae on Miranda. We find that this MMR was followed by a sequence of secular resonances, which reshuffled the moons’ eccentricities and inclinations. We also find that the precession of Oberon’s spin axis is close to a resonance with the precession of Umbriel’s orbital plane, and that this spin–orbit resonance was likely excited during the Ariel–Umbriel 5:3 MMR. After the exit from the MMR, subsequent Ariel–Umbriel secular resonance and Oberon–Umbriel spin–orbit resonance may be able to explain the current low inclinations of Ariel and Umbriel. The age of Miranda’s surface features tentatively suggests Uranian tidal Q = 15,000–20,000, which can be further refined in future work.
Murine Glucocorticoid Receptors Orchestrate B Cell Migration Selectively between Bone Marrow and Blood
Authors: Cain Derek W. , Bortner Carl D. , Diaz-Jimenez David , Petrillo Maria G. , Gruver-Yates Amanda , Cidlowski John A. 
Published: June 2020

Abstract
Glucocorticoids promote CXCR4 expression by T cells, monocytes, macrophages, and eosinophils, but it is not known if glucocorticoids regulate CXCR4 in B cells. Considering the important contributions of CXCR4 to B cell development and function, we investigated the glucocorticoid/CXCR4 axis in mice. We demonstrate that glucocorticoids upregulate CXCR4 mRNA and protein in mouse B cells. Using a novel strain of mice lacking glucocorticoid receptors (GRs) specifically in B cells, we show that reduced CXCR4 expression associated with GR deficiency results in impaired homing of mature B cells to bone marrow, whereas migration to other lymphoid tissues is independent of B cell GRs. The exchange of mature B cells between blood and bone marrow is sensitive to small, physiologic changes in glucocorticoid activity, as evidenced by the lack of circadian rhythmicity in GR-deficient B cell counts normally associated with diurnal patterns of glucocorticoid secretion. B cellGRKO mice mounted normal humoral responses to immunizations with T-dependent and T-independent (Type 1) Ags, but Ab responses to a multivalent T-independent (Type 2) Ag were impaired, a surprise finding considering the immunosuppressive properties commonly attributed to glucocorticoids. We propose that endogenous glucocorticoids regulate a dynamic mode of B cell migration specialized for rapid exchange between bone marrow and blood, perhaps as a means to optimize humoral immunity during diurnal periods of activity.
Knowledge, Attitude, and Practice of Adverse Drug Reaction, and Adverse Drug Reaction Reporting Among Practising Dermatologists in Maharashtra
Authors: Pande Sushil , Shirolikar Manasi 
Published: June 2020

Introduction:
Adverse drug reactions (ADRs) are common in a dermatological practice. Underreporting of ADR is a concern for dermatologists across the world. Aim: This survey aims to assess the attitudes and current reporting practices of ADRs and to understand possible causes for underreporting of ADRs amongst practising dermatologists of Maharashtra This will help to better understand, which steps will be effective to increase the reporting of ADRs.

Study Design:
Descriptive cross sectional questionnaire based study.

Materials and Methods:
The descriptive cross sectional questionnaire based study was conducted in Department of Dermatology of tertiary care hospital in central India from a period of April 2017 to September 2018. The target population was all practising dermatologists across Maharashtra. All practising dermatologists willing to participate in the survey were included while postgraduate students in dermatology and other fields, those not willing to participate in the study, doctors of non-allopathic disciplines practicing dermatology were excluded.

Results:
A total of 49% of the surveyed dermatologists see cases of ADRs often in their practice. Of these, the most common cutaneous adverse reaction is to topical corticosteroids. 30% of surveyed dermatologists had heard of the ADR reporting system but did not know how it is done while 27% had reported ADRs.

Conclusion:
The current trend of underreporting of ADRs is alarming as many dermatologists are not even aware that ADR in their practice needs to be reported.
Positive definite functions and cut-off for discrete groups
Authors: Freslon Amaury 
Published: June 2020

AbstractWe consider the sequence of powers of a positive definite function on a discrete group. Taking inspiration from random walks on compact quantum groups, we give several examples of situations where a cut-off phenomenon occurs for this sequence, including free groups and infinite Coxeter groups. We also give examples of absence of cut-off using free groups again.
Injective modules over the Jacobson algebra
Authors: Abrams Gene , Mantese Francesca , Tonolo Alberto 
Published: June 2020

AbstractFor a field K, let
$\mathcal {R}$
denote the Jacobson algebra
$K\langle X, Y \ | \ XY=1\rangle $
. We give an explicit construction of the injective envelope of each of the (infinitely many) simple left
$\mathcal {R}$
-modules. Consequently, we obtain an explicit description of a minimal injective cogenerator for
$\mathcal {R}$
. Our approach involves realizing
$\mathcal {R}$
up to isomorphism as the Leavitt path K-algebra of an appropriate graph
$\mathcal {T}$
, which thereby allows us to utilize important machinery developed for that class of algebras.
Možnosti za uporabo na študenta osredinjenih metod poučevanja in učenja bioloških predmetov na UP FAMNIT
Authors: Fišer Živa , Baruca Arbeiter Alenka 
Published: June 2020

Za uspešno pridobivanje teoretičnega znanja in globlje razumevanje zgradbe in delovanja bioloških struktur ter pojavov je teoretični pouk bioloških predmetov na vseh stopnjah izobraževanja podprt s praktičnimi vajami. Na visokošolski stopnji so praktične vaje pri posameznih predmetih celo bolj ali manj enakovreden del predavanjem. Na študenta osredinjeni pristopi učenja in poučevanja, podprti z orodji informacijsko-komunikacijske tehnologije (IKT), lahko pripomorejo k učinkovitejšemu razvoju znanja, izjemnega pomena pa so lahko tudi z vidika pridobivanja digitalnih kompetenc pri študentih. Na Fakulteti za matematiko, naravoslovje in informacijske tehnologije Univerze na Primorskem (UP FAMNIT) smo izvedli anketno raziskavo, v kateri smo želeli ugotoviti, kakšne metode poučevanja uporabljajo izvajalci praktičnega pouka bioloških predmetov. Rezultati so pokazali, da le slaba polovica anketiranih izvajalcev v praktični pouk vključuje inovativne metode učenja in poučevanja. Med orodji IKT, po katerih smo spraševali v anketi, več kot 80 % vprašanih pozna in uporablja prosto dostopno virtualno učno okolje Moodle. Mnogi poznajo tudi druge spletne aplikacije, vendar jih ne vključujejo v pedagoški proces. Večina vprašanih je naklonjena uporabi orodij IKT, a jih največkrat ne uporabljajo zaradi stiske s časom ali zaradi njihovega slabega poznavanja.
Implementasi Kebijakan Terhadap Pengelolaan Informasi Publik Pada Badan Publik
Authors: Laila Laila 
Published: June 2020

This study aims to describe public information management in context of implementation of law no. 14 Tahun 2008 at Public institution in Banjarmasin. By qualitative descriptive, result of study shows that public information management, not all of them refer to law of KIP. Officer of the management information and documentation, SOP of public services and list of public information, has not been arranged mainly, just a discourse. Therefore the government of South Kalimantan, Mayor of Banjarmasin and Rector of university management should respons law of KIP to instruct to public bodies immediately to establish officer of public information management in their environment.
Keywords: Public Information Management and Implementation law of KIP

ABSTRAK
Penelitian ini bertujuan untuk mendiskripsikan pengelolaan informasi publik dalam kontek implementasi UU no 14 tahun 2008 pada Badan Publik di Kota Banjarmasin. Melalui diskriptif kualitatif hasil penelitian menunjukkan bahwa pengelolaan informasi publik pada Badan publik di Kota Banjarmasin, belum semuanya mengacu pada UU KIP, pejabat pengelola informasi dan dokumentasi, SOP layanan Publik dan daftar informasi publik sebagian besar belum tersusun, masih sebatas wacana dan koordinasi dari badan publik. Karenanya Gubernur Kalimantan Selatan, Walikota Banjarmasin dan Rektor Unlam hendaknya merespon adanya UU KIP dengan menginstruksikan kepada badan publik, untuk segera membentuk pejabat pengelola informasi publik dilingkungannya.
Kata Kunci : Pengelolaan Informasi publik dan Impelementasi Undang-Undang KIP
Strategi Marketing Hary Tanoesoedibjo dalam Usaha Membangun Personal Branding Politik
Authors: Sitanggang Hartini Basaria Natasya , Dharmawan Awang 
Published: June 2020

Today, many people have already used new media for doing their activities, includes communicating. The benefits in opening the edges each humans and using the innovating technology makes the new media usually used by citizen. These concerns are used by the politic consultant to promote some political parties or some candidates. HaryTanoesoedibjo is one of media businessman in Indonesia who tries to take his way becoming a politician. To increase his electability in politic, a politic consultant for HaryTanoesoedibjo should be able to know the right strategies for HaryTanoesoedibjo. This study was made to know what strategies are right for HaryTanoesoedibjo. This research was using the 4Ps and PDB analysis. Besides that, this study was also intended to know the right platform for HaryTanoesoedibjo in case for succeed his way for president election. The datas in this study are from the analysis in social media and website that used by HaryTanoesoedibjo and some available literatures.
Keywords: Political Marketing Strategy, New Media, HaryTanoesoedibjo,

ABSTRAK
Kekuatan media baru sebagai sumber informasi politik, tidak lepas dari perkembangannya sudah menjadi media mainsream yang membangun interaktivitas bagi sesama penggunanya. Hal inilah yang dimanfaatkan oleh konsultan politik untuk mempromosikan partai politik atau kandidat perseorangan. Hary Tanoesoedibjo, sebagai salah satu pebisnis media yang memasuki jalan sebagai politisi. Dalam menaikkan popularitasnya di dunia politik, konsultan politik yang dimiliki oleh Hary Tanoesoedibjo berusaha menerapkan strategi marketing politik, karena mengingat Partai Indonesia Raya (Perindo) dan Hary Tanoesoedibjo sendiri terbilang baru dalam panging politik nasional. Studi ini dibuat untuk mengetahui bagaimana strategi marketing politik dari tim Hary Tanoesoedibjo. Penelitian ini menggunakanan konsep product, place, price, promotion, dan segmentation (4PS) dan positioning, differentiation, dan branding (PDB). Selain itu, studi ini juga ditujukan untuk mengetahui bagaimana platform media baru yang digunakan oleh Hary Tanoesoedibjo sebagai ketua Partai Persatuan Indonesia (Perindo).
Kata kunci: Strategi Marketing Politik, Media baru, Hary Tanoesodibjo.