bluuebunny/crossref_metadata_2025_split huggingface dataset:
From Scattered-light to Millimeter Emission: A Comprehensive View of the Gigayear-old System of HD 202628 and its Eccentric Debris Ring
Authors: Faramaz Virginie , Krist John , Stapelfeldt Karl R. , Bryden Geoffrey , Mamajek Eric E. , Matrà Luca , Booth Mark , Flaherty Kevin , Hales Antonio S. , Hughes A. Meredith , Bayo Amelia , Casassus Simon , Cuadra Jorge , Olofsson Johan , Su Kate Y. L. , Wilner David J. 
Published: September 2019

Abstract
We present here new observations of the eccentric debris ring surrounding the Gyr-old solar-type star HD 202628: at millimeter wavelengths with ALMA, at far-infrared wavelengths with Herschel, and in scattered light with the Hubble Space Telescope (HST). The ring inner edge is found to be consistent between ALMA and HST data. As radiation pressure affects small grains seen in scattered-light, the ring appears broader at optical than at millimeter wavelengths. The best fit to the ring seen with ALMA has inner and outer edges at 143.1 ± 1.7 au and 165.5 ± 1.4, respectively, and an inclination of 57.°4 ± 0.4 from face-on. The offset of the ring center of symmetry from the star allows us to quantify its eccentricity to be

. This eccentric feature is also detected in low resolution Herschel/PACS observations, under the form of a pericenter-glow. Combining the infrared and millimeter photometry, we retrieve a disk grain size distribution index of ∼−3.4, and therefore exclude in situ formation of the inferred belt-shaping perturber, for which we provide new dynamical constraints. Finally, ALMA images show four point-like sources that exceed 100 μJy, one of them being just interior to the ring. Although the presence of a background object cannot be excluded, we cannot exclude either that this source is circumplanetary material surrounding the belt-shaper, in which case degeneracies between its mass and orbital parameters could be lifted, allowing us to fully characterize such a distant planet in this mass and age regime for the very first time.
A Forward Modeling Approach to AGN Variability--Method Description and Early Applications
Authors: Sartori Lia F. , Trakhtenbrot Benny , Schawinski Kevin , Caplar Neven , Treister Ezequiel , Zhang Ce 
Published: September 2019

Abstract
We present a numerical framework for the variability of active galactic nuclei (AGNs), which links the variability of AGNs over a broad range of timescales and luminosities to the observed properties of the AGN population as a whole, and particularly the Eddington ratio distribution function. We implemented our framework on GPU architecture, relying on previously published time-series-generating algorithms. After extensive tests that characterize several intrinsic and numerical aspects of the simulations, we describe some applications used for current and future time-domain surveys and for the study of extremely variable sources (e.g., “changing-look” or flaring AGNs). Specifically, we define a simulation setup that reproduces the AGN variability observed in the (intermediate) Palomar Transient Factory survey and use it to forward model longer light curves of the kind that may be observed within the Large Synoptic Survey Telescope (LSST) main survey. Thanks to our efficient implementations, these simulations are able to cover, for example, over 1 Myr with a roughly weekly cadence. We envision that this framework will become highly valuable to prepare for, and best exploit, data from upcoming time-domain surveys, such as, for example, LSST.
Interaction of SN Ib 2004dk with a Previously Expelled Envelope
Authors: Pooley David , Wheeler J. Craig , Vinkó Jozsef , Dwarkadas Vikram V. , Szalai Tamas , Silverman Jeffrey M. , Griesel Madelaine , McCullough Molly , Marion G. H. , MacQueen Phillip 
Published: September 2019

Abstract
The interaction between the expanding supernova (SN) ejecta with the circumstellar material (CSM) that was expelled from the progenitor prior to explosion is a long-sought phenomenon, yet observational evidence is scarce. Here we confirm a new example: SN 2004dk, originally a hydrogen-poor, helium-rich Type Ib SN that reappeared as a strong

-emitting point source on narrowband

images. We present follow-up optical spectroscopy that reveals the presence of a broad

component with full width at half maximum of ∼ 290

in addition to the narrow

+[N ii] emission features from the host galaxy. Such a broad component is a clear sign of an ejecta–CSM interaction. We also present observations with the XMM-Newton Observatory, the Swift satellite, and the Chandra X-ray Observatory that span 10 days to 15 years after discovery. The detection of strong radio, X-ray, and

emission years after explosion allows various constraints to be put on pre-SN mass-loss processes. We present a wind-bubble model in which the CSM is “pre-prepared” by a fast wind interacting with a slow wind. Much of the outer density profile into which the SN explodes corresponds to no steady-state mass-loss process. We estimate that the shell of compressed slow wind material was ejected ∼1400 yr prior to explosion, perhaps during carbon burning, and that the SN shock had swept up about 0.04

of material. The region emitting the

has a density of order

.
Direct N-body Simulations of Tidal Disruption Rate Evolution in Unequal-mass Galaxy Mergers
Authors: Li Shuo , Berczik Peter , Chen Xian , Liu F. K. , Spurzem Rainer , Qiu Yu 
Published: September 2019

Abstract
The hierarchical galaxy formation model predicts supermassive black hole binaries (SMBHBs) in galactic nuclei. Due to the gas poor environment and the limited spatial resolution in observations they may hide in the center of many a galaxy. However, a close encounter of a star with one of the supermassive black holes (SMBHs) may tidally disrupt it to produce a tidal disruption event (TDE) and temporarily light up the SMBH. In a previous work, we investigated direct N-body simulations with the evolution of TDE rates of SMBHB systems in galaxy mergers of equal mass. In this work we extend the investigation to unequal-mass mergers. Our results show that, when two SMBHs are far away from each other, the TDE rate of each host galaxy is similar as in an isolated galaxy. As the two galaxies and their SMBHs separation shrink, the TDE rate increases gradually until it reaches a maximum shortly after the two SMBHs become bound. In this stage, the averaged TDE rate can be enhanced by several times to an order of magnitude relative to isolated single galaxies. Our simulations show that the dependence of the TDE accretion rate on the mass ratio in this stage can be well fitted by power-law relations for both SMBHs. After the bound SMBHB forms, the TDE rate decreases with its further evolution. We also find that in minor mergers TDEs of the secondary SMBH during and after the bound binary formation are mainly contributed by stars from the other galaxy.
Direct Calculation of Self-gravitational Force for Infinitesimally Thin Gaseous Disks Using Adaptive Mesh Refinement
Authors: Tseng 曾耀 Yao-Huan 寰 , Shang 尚 Hsien 賢 , Yen 嚴健 Chien-Chang 彰 
Published: September 2019

Abstract
Yen et al. advanced a direct approach for the calculation of self-gravitational force to second-order accuracy based on uniform grid discretization. This method improves the accuracy of N-body calculation using exact integration of kernel functions and employing the Fast Fourier Transform to reduce the complexity of computation to be nearly linear. This direct approach is free of artificial boundary conditions; however, the applicability is limited by the uniform discretization of grids. We report here an advancement in the direct method with the implementation of adaptive mesh refinement and maintaining second-order accuracy, which breaks the barrier set by uniform grid discretization. The adoption of graphic process units can significantly speed up the computation and make application of this method possible for the astrophysical systems of gaseous disk galaxies and protoplanetary disks.
The Observability of Vortex-driven Spiral Arms in Protoplanetary Disks: Basic Spiral Properties
Authors: Huang 黄 Pinghui 平辉 , Dong 董 Ruobing 若冰 , Li 李 Hui 晖 , Li 李 Shengtai 胜台 , Ji 季 Jianghui 江徽 
Published: September 2019

Abstract
Some circumstellar disks are observed to show prominent spiral arms in infrared scattered light or (sub-)millimeter dust continuum. The spirals might be formed from self-gravity, shadows, or planet–disk interactions. Recently, it was hypothesized that massive vortices can drive spiral arms in protoplanetary disks in a way analogous to planets. In this paper, we study the basic properties of vortex-driven spirals by the Rossby Wave Instability in 2D hydrodynamics simulations. We study how the surface density contrast, the number, and the shape of vortex-driven spirals depend on the properties of the vortex. We also compare vortex-driven spirals with those induced by planets. The surface density contrast of vortex-driven spirals in our simulations are comparable to those driven by a sub-thermal mass planet, typically a few to a few tens of Earth masses. In addition, different from the latter, the former is not sensitive to the mass of the vortex. Vortex-driven spiral arms are not expected to be detectable in current scattered light observations, and the prominent spirals observed in scattered light in a few protoplanetary disks, such as SAO 206462 (HD 135344B), MWC 758, and LkHα 330, are unlikely to be induced by the candidate vortices in them.
Revisiting the Strongest Martian X-Ray Halo Observed by XMM-Newton on 2003 November 19–21
Authors: Yan Limei , Gao Jiawei , Chai Lihui , Zhao Lingling , Rong Zhaojin , Wei Yong 
Published: September 2019

Abstract
On 2003 November 20–21, when the most intense geomagnetic storm during solar cycle 23 was observed at Earth, XMM-Newton recorded the strongest Martian X-ray halo hitherto. The strongest Martian X-ray halo has been suggested to be caused by the unusual solar wind, but no direct evidence has been given in previous studies. Here, we examined the Mars Global Surveyor (MGS) observations and found unambiguous evidence of unusual solar wind impact during that XMM-Newton observation: the whole induced magnetosphere of Mars was highly compressed. By comparing the solar wind dynamic pressure estimated at Mars from MGS observation and that predicted by different solar wind propagation models, it is further supported that the interplanetary condition during the XMM-Newton observation is not related to the quiet solar wind, but to solar wind disturbances with enhanced dynamic pressure, which is probably related to the interplanetary coronal mass ejection observed at Earth on 2003 November 20. A solar energetic particle event also impacted Mars during the XMM-Newton observation and lasted for several days. Its impact on the production of the X-ray emission from Mars may be worth investigating in the future.
Epidemiological Transition and the Wealth of Nations: the Case of HIV/AIDS in a Microsimulation Model
Authors: Arrighi Yves , Ventelou Bruno 
Published: September 2019

Cet article vise à décomposer l’effet de programmes curatifs sur la performance macroéconomique de pays en développement en phase de transition épidémiologique. Il est largement admis dans la littérature que les programmes d’accès aux soins génèrent des gains de productivité chez les travailleurs en mauvaise santé. Cependant, ces programmes modifient par nature la taille et la composition de la population active en augmentant la proportion d’individus souffrant de maladies chroniques, atténuant ainsi l’effet sur la productivité moyenne. Après avoir défini les conditions théoriques nécessaires à ce que cet effet de structure supplante l’effet productif de l’accès aux soins, nous transposons cette investigation au cas des programmes de traitements antirétroviraux dans trois pays d’Afrique subsaharienne touchés par le VIH/SIDA. Un modèle de microsimulation est utilisé pour générer ex-ante les trajectoires de santé et de production d’individus représentatifs, selon qu’ils aient ou non accès aux antirétroviraux. Nous utilisons le modèle pour générer un « contrefactuel » (en l’absence de l’effet de composition) et constatons que l’effet productif l’emporte sur l’effet épidémiologique négatif. Bien entendu, cette approche n’est qu’un indicateur des performances économiques et, en tout état de cause, ne doit pas constituer un critère de décision sur la nécessité éthique de l’accès aux soins. JEL Codes: I15, J11, J21
Early Repolarization with a Constant ST-segment Elevation in Leads II, III, and AVF
Authors: Kalinauskiene Egle , Jucevicius Jonas , Vencloviene Jone , Jankauskas Antanas , Navickaite Inesa , Naudziunas Albinas 
Published: September 2019

Background:
A recent scientific statement from the American Heart Association included ST-segment elevation in the absence of chest pain in the definition of early repolarization (ER). ST-elevation at J-point termination (Jt)-point was not taken into account in previous heritability studies. The relevance of ST-elevation at Jt point (especially in inferior leads) is not evident enough. Our aim was to assess the heritability of ER with ST-elevation in inferior leads among offspring of such patients and patients' follow-up results.

Materials and Methods:
A prospective study of 16 consecutive patients with inferior ST-elevation at Jt ≥0.1 mV, who have arrived to outpatient department most often due to chest pain not associated with coronary stenosis according to multislice computed tomography angiography, started in 2013. Repeated cardiologist evaluation included their 12 children in 2017. Comparisons were made with 16 age- and gender-matched control patients' rest 12-lead electrocardiograms (ECGs) from the outpatient department of year 2018. Impact of ST-elevation's localization and sex on heritability were assessed by odds ratio (OR) with 95% confidence interval (CI).

Results:
There were no significant changes of patients' (all men) health and ECGs during follow-up. Eight (66.7%) of their children were ECG-positive versus 1 (6.2%) control patient,P = 0.001. All siblings (from the same father) of 5 (62.5%) ECG-positive children were ECG-positive. Two of the 5 (male and female) underwent detailed evaluation, including cardiac magnetic resonance, without abnormalities. In cases of only inferior father's ST-elevation, OR, 3.00; 95%CI, 0.24-37.7, and for male children, OR, 7.00; 95%CI, 0.400-23, for presenting with this pattern.

Conclusions:
Constant inferior ST-elevation, even in cases of chest pain, maybe ER, heritable without structural abnormalities. Heritability may be greater for male offspring and in cases of only inferior father's ST-elevation. Longer studies are necessary to confirm that it is benign. We suggest the term “a constant ST-segment elevation (at Jt)” instead of “ST-segment elevation in the absence of chest pain,” with adding that it is possible latent, depending on the heart rate.
Improving the Metrics and Data Reporting for Maternal Mortality:A Challenge to Public Health Surveillance and Effective Prevention
Authors: Studnicki James , Reardon David , Harrison Donna , Fisher John , Skop Ingrid 
Published: September 2019

AbstractBackgroundThe current measuring metric and reporting methods for assessing maternal mortality are seriously flawed. Evidence-based prevention strategies require consistently reported surveillance data and validated measurement metrics.Main BodyThe denominator of live births used in the maternal mortality ratio reinforces the mistaken notion that all maternal deaths are consequent to a live birth and, at the same time, inappropriately inflates the value of the ratio for subpopulations of women with the highest percentage of pregnancies ending in outcomes other than a live birth. Inadequate methods for identifying induced or spontaneous abortion complications assure that most maternal deaths associated with those pregnancy outcomes are unlikely to be attributed. Absent the ability to identify all maternal deaths, and without the ability to differentiate those deaths by specific pregnancy outcomes, existing variations in pregnancy outcome-specific maternal deaths are masked by the use of an aggregated (all outcome) numerator. Under these circumstances, clear and accurate data is not available to inform evidence-based preventive strategies. As the result, algorithms applied for analyzing maternal mortality data may return distorted results.ConclusionImprovement in the effectiveness of maternal mortality surveillance will require: mandatory certification of all fetal losses; linkage of death, birth and all fetal loss (induced and natural) certificates; modification of the structure of the overall maternal mortality ratio to enable pregnancy outcome-specific ratio calculations; development of the appropriate ICD codes which are specific to induced and spontaneous abortions; education for providers on identifying and reporting early pregnancy losses; and, flexible information systems and methods which integrate these capabilities and inform users.
Development of automated text-message reminder system to improve uptake of childhood vaccination in North-West, Ethiopia
Authors: Mekonnen Zeleke Abebaw , Hussien Fedlu Nurhussien , Tilahun Binyam Chakilu , Gelaye Kassahun Alemu , Mamuye Adane Letta 
Published: September 2019

Introduction: Non-attendance and delay for vaccination schedules remains a big challenge to healthcare workers. Among the frequently mentioned reasons for missed vaccination in children is the lack of communication between child caretakers and health workers. This necessitates developing an appropriate and uninterrupted vaccine delivery strategy with more focus on demand side interventions like forgetfulness.Objectives: This paper aimed to develop and test an automated mobile text message reminder system in the local context.Methods: Before development of the system, interview and document reviews were used for requirement gathering. This system is developed using iterative development process through phases of requirement analysis, design, development, testing and refinement. Front end application was developed using Java technologies while back end applications were developed with Oracle database. Finally, pilot testing was done on 30 participants before actual implementation.Results: The automated system has been developed based on requirements. The text message reminder system has two components: 1. Web based application for client registration and automatic reminder scheduling; 2.SMS application for automatic SMS text messaging. In the final testing, all the messages (100%) were delivered to the piloted mothers. Message speeds for each individual client ranged on average from 5 second to 30 seconds.Conclusion: Text message reminder system has been developed for routine childhood immunization program in Ethiopian context. Text message interventions should be carefully developed, tested and refined before implementation to ensure they are written in the most appropriate way for their target population.
A Demand for Data to Improve Outcomes Creates the Why to Move to Third Generation Immunization Information Systems
Authors: Watkins Todd , Popovich Michael , Crane Kristina 
Published: September 2019

Investments over the past two decades to collect and store immunization events established a national population health data asset. The ability to track vaccine usage and storage has increased accountability, lowered wastage, protected valuable resources, and provided the correct vaccines at the right time.Sixty-four immunization registries support the current immunization ecosystem, yet all investments to date have been through state and federal funding. Much of the technology supporting these registries is becoming harder to support, limiting the utilization of the data. For the most part all current systems have legacy second-generation technology and architectures as their foundation. Current technology investments in these national assets tend to be for systems that within the next five years will not be cost effectively sustainable with only federal, state and local funding. Yet quality data is being reported by immunization providers across the health care network that is increasing exponentially through electronic data exchanges integrated within Electronic Health Records (EHR) and Pharmacy Management Systems (PMS).This increase in high-quality patient immunization records creates opportunity to build immunization intelligence from the data. However, second-generation Immunization Information Systems (IIS) limit the effective and timely use of this information. Considering the increasing value of the data to public and private sectors working to close immunization care gaps in populations supporting technology must ensure easy access.This is the first of two papers that highlights the power of these national registries and the data they contain to provide opportunity intelligence to the immunization ecosystem user community. Paper one illustrates the “why” for change and the need for a truly community collaborative path forward to move from second- to third-generation systems through partners that leverages cost sharing and common goals.The end goal is to establish new supporting technology assets that accelerate the use of data to impact vaccine preventable disease (VPD) outcomes which create a new model for public-private investments to sustain the IIS national infrastructure. The second paper will share cost and investment strategies to complete the migration and create sustainable immunization systems for the future.
On the Potential, Feasibility, and Effectiveness of Chat Bots in Public Health Research Going Forward
Authors: Mierzwa Stanley John , Souidi Samir , Conroy Terry , Abusyed Mohammad , Watarai Hiroki , Allen Tammy 
Published: September 2019

This paper will discuss whether bots, particularly chat bots, can be useful in public health research and health or pharmacy systems operations. Bots have been discussed for many years; particularly when coupled with artificial intelligence, they offer the opportunity of automating mundane or error-ridden processes and tasks by replacing human involvement with bots. This paper will discuss areas where there are greater advances in the use of bots, as well as areas that may benefit from the use of bots, and will offer practical ways to get started with bot technology. Several popular bot applications and bot development tools along with practical security considerations will be discussed, and a toolbox that one can begin to use to implement bots will be presented.
NECESSIDADES FORMATIVAS PARA A AÇÃO DOCENTE INCLUSIVA DE PROFESSORES DE EDUCAÇÃO FÍSICA ESCOLAR
Authors: Morais MILENA Pedro , Rodrigues Graciele Massoli , Filgueiras Isabel Porto 
Published: September 2019

O objetivo da pesquisa foi analisar de que forma os Jogos Escolares Inclusivos contribuíram para a ação docente inclusiva dos professores de Educação Física Escolar do município de Itanhaém e identificar as barreiras enfrentadas pelos professores para participação nesse evento. Participaram 20 professores de Educação Física. A coleta de dados ocorreu com o uso de entrevista semi-dirigida e análise por meio da análise de conteúdo proposta por Bardin (2011). Concluímos que um conjunto de fatores interfere de forma negativa na ação docente inclusiva, porém, ao atuar como agentes transformadores os professores têm conseguido atingir a comunidade escolar e a família dos alunos, mostrando o potencial da criança e o quanto ela é capaz de evoluir no processo ensino/aprendizado. Palavras chave: Educação Física Escolar Inclusiva. Formação de professores. Inclusão Escolar.