bluuebunny/crossref_metadata_2025_split huggingface dataset:
An Observational Upper Limit on the Interstellar Number Density of Asteroids and Comets
Authors: Engelhardt Toni , Jedicke Robert , Vereš Peter , Fitzsimmons Alan , Denneau Larry , Beshore Ed , Meinke Bonnie 
Published: February 2017

Abstract
We derived 90% confidence limits (CLs) on the interstellar number density (

) of interstellar objects (ISOs; comets and asteroids) as a function of the slope of their size–frequency distribution (SFD) and limiting absolute magnitude. To account for gravitational focusing, we first generated a quasi-realistic ISO population to

from the Sun and propagated it forward in time to generate a steady state population of ISOs with heliocentric distance

. We then simulated the detection of the synthetic ISOs using pointing data for each image and average detection efficiencies for each of three contemporary solar system surveys—Pan-STARRS1, the Mt. Lemmon Survey, and the Catalina Sky Survey. These simulations allowed us to determine the surveys’ combined ISO detection efficiency under several different but realistic modes of identifying ISOs in the survey data. Some of the synthetic detected ISOs had eccentricities as small as 1.01, which is in the range of the largest eccentricities of several known comets. Our best CL of

implies that the expectation that extra-solar systems form like our solar system, eject planetesimals in the same way, and then distribute them throughout the Galaxy, is too simplistic, or that the SFD or behavior of ISOs as they pass through our solar system is far from expectation.
Binary Source Microlensing Event OGLE-2016-BLG-0733: Interpretation of a Long-term Asymmetric Perturbation
Authors: Jung Y. K. , Udalski A. , Yee J. C. , Sumi T. , Gould A. , Han C. , Albrow M. D. , Lee C.-U. , Kim S.-L. , Chung S.-J. , Hwang K.-H. , Ryu Y.-H. , Shin I.-G. , Zhu W. , Cha S.-M. , Kim D.-J. , Lee Y. , Park B.-G. , Pogge R. W. ,   (The KMTNet Collaboration), Pietrukowicz P. , Kozłowski S. , Poleski R. , Skowron J. , Mróz P. , Szymański M. K. , Soszyński I. , Pawlak M. , Ulaczyk K. ,   (The OGLE Collaboration), Abe F. , Bennett D. P. , Barry R. , Bond I. A. , Asakura Y. , Bhattacharya A. , Donachie M. , Freeman M. , Fukui A. , Hirao Y. , Itow Y. , Koshimoto N. , Li M. C. A. , Ling C. H. , Masuda K. , Matsubara Y. , Muraki Y. , Nagakane M. , Oyokawa H. , Rattenbury N. J. , Sharan A. , Sullivan D. J. , Suzuki D. , Tristram P. J. , Yamada T. , Yamada T. , Yonehara A. ,   (The MOA Collaboration)
Published: February 2017

Abstract
In the process of analyzing an observed light curve, one often confronts various scenarios that can mimic the planetary signals causing difficulties in the accurate interpretation of the lens system. In this paper, we present the analysis of the microlensing event OGLE-2016-BLG-0733. The light curve of the event shows a long-term asymmetric perturbation that would appear to be due to a planet. From the detailed modeling of the lensing light curve, however, we find that the perturbation originates from the binarity of the source rather than the lens. This result demonstrates that binary sources with roughly equal-luminosity components can mimic long-term perturbations induced by planets with projected separations near the Einstein ring. The result also represents the importance of the consideration of various interpretations in planet-like perturbations and of high-cadence observations for ensuring the unambiguous detection of the planet.
A High Space Density of Luminous Lyα Emitters at
z
∼
6.5
Authors: Bagley Micaela B. , Scarlata Claudia , Henry Alaina , Rafelski Marc , Malkan Matthew , Teplitz Harry , Dai Y. Sophia , Baronchelli Ivano , Colbert James , Rutkowski Michael , Mehta Vihang , Dressler Alan , McCarthy Patrick , Bunker Andrew , Atek Hakim , Garel Thibault , Martin Crystal L. , Hathi Nimish , Siana Brian 
Published: February 2017

Abstract
We present the results of a systematic search for Lyα emitters (LAEs) at

6
≲
z
≲
7.6

using the HST WFC3 Infrared Spectroscopic Parallel (WISP) Survey. Our total volume over this redshift range is

∼
8
×

10

5

Mpc3, comparable to many of the narrowband surveys despite their larger area coverage. We find two LAEs at z = 6.38 and 6.44 with line luminosities of

L

Ly
α

∼
4.7
×

10

43

erg s−1, putting them among the brightest LAEs discovered at these redshifts. Taking advantage of the broad spectral coverage of WISP, we are able to rule out almost all lower-redshift contaminants. The WISP LAEs have a high number density of

7.7
×

10

−
6

Mpc−3. We argue that the LAEs reside in megaparsec-scale ionized bubbles that allow the Lyα photons to redshift out of resonance before encountering the neutral intergalactic medium. We discuss possible ionizing sources and conclude that the observed LAEs alone are not sufficient to ionize the bubbles.
On the Incidence of Wise Infrared Excess Among Solar Analog, Twin, and Sibling Stars
Authors: Da Costa A. D. , Martins B. L. Canto , Leão I. C. , Lima Jr J. E. , Silva D. Freire da , Freitas D. B. de , Medeiros J. R. De 
Published: February 2017

Abstract
This study presents a search for infrared (IR) excess in the 3.4, 4.6, 12, and 22 μm bands in a sample of 216 targets, composed of solar sibling, twin, and analog stars observed by the Wide-field Infrared Survey Explorer (WISE) mission. In general, an IR excess suggests the existence of warm dust around a star. We detected 12 μm and/or 22 μm excesses at the 3σ level of confidence in five solar analog stars, corresponding to a frequency of 4.1% of the entire sample of solar analogs analyzed, and in one out of 29 solar sibling candidates, confirming previous studies. The estimation of the dust properties shows that the sources with IR excesses possess circumstellar material with temperatures that, within the uncertainties, are similar to that of the material found in the asteroid belt in our solar system. No photospheric flux excess was identified at the W1 (3.4 μm) and W2 (4.6 μm) WISE bands, indicating that, in the majority of stars of the present sample, no detectable dust is generated. Interestingly, among the 60 solar twin stars analyzed in this work, no WISE photospheric flux excess was detected. However, a null-detection excess does not necessarily indicate the absence of dust around a star because different causes, including dynamic processes and instrument limitations, can mask its presence.
The Surface Brightness-color Relations Based on Eclipsing Binary Stars: Toward Precision Better than 1% in Angular Diameter Predictions
Authors: Graczyk Dariusz , Konorski Piotr , Pietrzyński Grzegorz , Gieren Wolfgang , Storm Jesper , Nardetto Nicolas , Gallenne Alexandre , Maxted Pierre F. L. , Kervella Pierre , Kołaczkowski Zbigniew 
Published: February 2017

Abstract
In this study we investigate the calibration of surface brightness–color (SBC) relations based solely on eclipsing binary stars. We selected a sample of 35 detached eclipsing binaries with trigonometric parallaxes from Gaia DR1 or Hipparcos whose absolute dimensions are known with an accuracy better than 3% and that lie within 0.3 kpc from the Sun. For the purpose of this study, we used mostly homogeneous optical and near-infrared photometry based on the Tycho-2 and 2MASS catalogs. We derived geometric angular diameters for all stars in our sample with a precision better than 10%, and for 11 of them with a precision better than 2%. The precision of individual angular diameters of the eclipsing binary components is currently limited by the precision of the geometric distances (∼5% on average). However, by using a subsample of systems with the best agreement between their geometric and photometric distances, we derived the precise SBC relations based only on eclipsing binary stars. These relations have precisions that are comparable to the best available SBC relations based on interferometric angular diameters, and they are fully consistent with them. With very precise Gaia parallaxes becoming available in the near future, angular diameters with a precision better than 1% will be abundant. At that point, the main uncertainty in the total error budget of the SBC relations will come from transformations between different photometric systems, disentangling of component magnitudes, and for hot OB stars, the main uncertainty will come from the interstellar extinction determination. We argue that all these issues can be overcome with modern high-quality data and conclude that a precision better than 1% is entirely feasible.
Redes sociales y museos: análisis de la campaña en Twitter para el Día Internacional de los Museos y Noche de los Museos
Authors: Caerols-Mateo Raquel , Viñarás-Abad Mónica , Gonzálvez-Valles Juan Enrique 
Published: February 2017

Las redes sociales suponen una oportunidad para la gestión de la comunicación en los museos. Este trabajo analiza la iniciativa conjunta de cinco museos en Twitter durante el hito más importante del año para el sector: el Día Internacional de los Museos y Noche de los Museos. El interés radica en la confluencia de distintas disciplinas y enfoques: las humanidades, la comunicación corporativa, el entorno digital y las relaciones públicas. Se añade la particularidad de que este tipo de instituciones no suelen ser objeto de estudio, a pesar de la gran relevancia que tienen en el panorama museístico -Lázaro Galdiano, del Romanticismo, Cerralbo, Nacional de Artes Decorativas y el Sorolla-. Metodología: Se realiza un análisis de contenido de los perfiles de Twitter de esos museos para conocer la gestión del contenido y de la participación en la red social. Resultados y Conclusiones: Los resultados indican la necesidad de una estrategia más definida que aproveche el potencial de las redes sociales, ya que el contenido no se utiliza como estrategia y la participación no responde a la esperada durante estos hitos tan relevantes.
Comparison of Two Different Methods of obtaining Strain by Perioperative Transesophageal Echocardiography in Patients undergoing Coronary Artery Bypass Graft Surgery: A Prospective Observational Study
Authors: Mandal Banashree , Raj Ravi , Kumar Alok , Bhat Imran 
Published: February 2017

ABSTRACT

Introduction
Tissue deformation imaging enables the objective assessment of regional myocardial deformation assessed by ultrasound-based strain and strain rate. There are two ways to compute myocardial deformation (strain) using echocardiography: One-dimensional tissue Doppler (DTI)-derived strain and two-dimensional (2D) strain derived from B-mode images (speckle tracking, 2D-ST). This study compares the myocardial deformation parameter (i.e., strain) by these two techniques in the perioperative period using transesophageal echocardiography (TEE) in patients undergoing surgery for coronary artery bypass graft (CABG).

Materials and methods
We performed preoperative global longitudinal strain (GLS) of left ventricle (LV) using 2D-ST and DTI, three-dimensional (3D) left ventricular ejection fraction (LVEF) and 2D LVEF in a consecutive series of 50 adult patients scheduled for on-pump CABG.

Result
There was no difference between 2D and 3D LVEF (p < 0.0001), GLS using 2D-ST and DTI (p-value = 0.0005). The 3D LVEF correlated well with GLS using 2D-ST (r = 0.54, p < 0.0001) and less with tissue Doppler-derived GLS (r = 0.35, p-value = 0.0131).

Conclusion
The LV GLS calculated using 2D-ST correlates well with LV GLS derived from DTI using TEE. The LV GLS also correlated well with the 3D LVEF.

How to cite this article
Kumar A, Mandal B, Raj R, Bhat I. Comparison of Two Different Methods of obtaining Strain by Perioperative Transesophageal Echocardiography in Patients undergoing Coronary Artery Bypass Graft Surgery: A Prospective Observational Study. J Perioper Echocardiogr 2016;4(2):37-44.
Right Ventricle Segmental Strain Trends in Patients undergoing Tetralogy of Fallot Repair: An Observational Study
Authors: Mandal Banashree , Barwad Parag , Negi Sunder Lal , Puri Kriti , Rana Sandeep S 
Published: February 2017

ABSTRACT

Introduction
Incidence of right ventricular (RV) dysfunction in early postoperative period after Tetralogy of Fallot (TOF) repair ranges from 28 to 63%. Echocardiography is the first-line tool for the assessment of RV function in early postoperative period. As speckle tracking echocardiography (STE) has emerged as a new promising tool for assessing myocardial performance and is independent of geometric assumptions and angle dependence, it is more sensitive for detecting changes in myocardial performance than conventional echocardiographic parameters of RV function. The current study demonstrates echocardiographic parameters assessed by conventional two-dimensional (2D) echocardiography and STE in patients before and after TOF repair.

Materials and methods
Fifty-nine consecutive patients planned for complete intracardiac repair for TOF were enrolled in this prospective cohort study. The 2D echocardiography and STE were performed a day prior to TOF repair, in the early postoperative period between days 3 and 7 and after discharge at 3 months.

Results
The median age of patients was 6 years, with 57.6% males (34/59). Baseline hemoglobin and room air oxygen saturation were 17.7 ± 3.7 gm% and 79.4% ± 8% respectively. Two patients did not survive the procedure (3.4%). Right ventricular longitudinal peak systolic strain (RV LPSS) in early postoperative period was significantly decreased in all segments of both septal and lateral wall. However, RV LPSS assessed at midterm follow-up at 3 months postoperatively significantly improved in all segments of RV compared with assessment done in the early postoperative period, and was significantly better than preoperative values in all three segments of the septal wall.

Conclusion
Our study shows that the use of 2D strain or speckle tracking is a feasible and easy-to-implement technique for the evaluation of RV function after TOF repair.

How to cite this article
Negi SL, Puri K, Mandal B, Rana SS, Barwad P. Right Ventricle Segmental Strain Trends in Patients undergoing Tetralogy of Fallot Repair: An Observational Study. J Perioper Echocardiogr 2016;4(2):45-50.
Perioperative Echocardiographic Features of Total Anomalous Pulmonary Venous Connection
Authors: Barwad Parag , Dutta Vikas , Kumar Alok 
Published: February 2017

ABSTRACT
Total anomalous pulmonary venous connection (TAPVC) refers to when all four pulmonary veins connect anomalously to the right atrium, directly or indirectly. Perioperative echocardiography, both transthoracic and transesophageal (TEE) with color flow imaging and Doppler interrogation, can identify the venous confluence, its connections, obstructions if any in the pathway, and any interatrial communication. They supplement each other in delineating the anatomy of such anomalous pulmonary venous connections. Perioperative TEE evaluation of patients with repaired TAPVC confirms the adequacy of repair, leaks or stenosis of the venous baffle. We summarize the role of perioperative echocardiography in understanding cases of TAPVC.

How to cite this article
Kumar A, Dutta V, Puri GD, Barwad P. Perioperative Echocardiographic Features of Total Anomalous Pulmonary Venous Connection. J Perioper Echocardiogr 2016;4(2):51-58.
The Value of a Systematic Transesophageal Echocardiography Examination: An Isolated Finding mimicking a Pleural Effusion
Authors: Kunju Shakeel AM , Rapchuk Ivan L 
Published: February 2017

ABSTRACT
An interesting case report of presumed pleural fluid collection observed during routine intraoperative transesophageal echocardiography examination is presented here. Acquisition of an isolated image without giving due consideration to the technique used in obtaining that image may be misleading and result in avoidable patient intervention.

How to cite this article
Kunju SAM, Rapchuk IL. The Value of a Systematic Transesophageal Echocardiography Examination: An Isolated Finding mimicking a Pleural Effusion. J Perioper Echocardiogr 2016;4(2):64-66.
Unusual Embolization of Atrial Septal Defect Device in Left Ventricle and its Successful Retrieval
Authors: Kumar Sanjay , Dutta Vikas , Kumar Alok 
Published: February 2017

ABSTRACT
Atrial septal defect (ASD) transcatheter occlusion techniques are now established as the preferred method and have become an alternative to surgery under extracorporeal circulation. In this study, we aimed to present our emergency surgical approach to an unusual case of device embolization to left ventricle due to migration of the ASD occluder. The diagnosis was made via transthoracic echocardiography postprocedure. No early or late complication was seen. Transesophageal echocardiography (TEE) examinations showed no residual interatrial shunting. Transcatheter occlusion of secundum-type ASD has drawbacks, such as distal migration and residual shunts. Consequently, we think that unfavorable anatomy (deficient or floppy rim, septal malalignment) and device diameter are major issues in device migration. Careful follow-up and TEE monitoring perioperatively can lead to successful management of such cases.

How to cite this article
Kumar S, Kumar A, Dutta V. Unusual Embolization of Atrial Septal Defect Device in Left Ventricle and its Successful Retrieval. J Perioper Echocardiogr 2016;4(2):67-69.
Two global data sets of daily fire emission injection heights since 2003
Authors: Rémy Samuel , Veira Andreas , Paugam Ronan , Sofiev Mikhail , Kaiser Johannes W. , Marenco Franco , Burton Sharon P. , Benedetti Angela , Engelen Richard J. , Ferrare Richard , Hair Jonathan W. 
Published: February 2017

Abstract. The Global Fire Assimilation System (GFAS) assimilates fire radiative power (FRP) observations from satellite-based sensors to produce daily estimates of biomass burning emissions. It has been extended to include information about injection heights derived from fire observations and meteorological information from the operational weather forecasts of ECMWF. Injection heights are provided by two distinct methods: the Integrated Monitoring and Modelling System for wildland fires (IS4FIRES) parameterisation and the one-dimensional plume rise model (PRM). A global database of daily biomass burning emissions and injection heights at 0.1° resolution has been produced for 2003–2015 and is continuously extended in near-real time with the operational GFAS service of the Copernicus Atmospheric Monitoring Service (CAMS). In this study, the two injection height data sets were compared with the new MPHP2 (MISR Plume Height Project 2) satellite-based plume height retrievals. The IS4FIRES parameterisation showed a better overall agreement than the observations, while the PRM was better at capturing the variability of injection heights. The performance of both parameterisations is also dependent on the type of vegetation. Furthermore, the use of biomass burning emission heights from GFAS in atmospheric composition forecasts was assessed in two case studies: the South AMerican Biomass Burning Analysis (SAMBBA) campaign which took place in September 2012 in Brazil, and a series of large fire events in the western USA in August 2013. For these case studies, forecasts of biomass burning aerosol species by the Composition Integrated Forecasting System (C-IFS) of CAMS were found to better reproduce the observed vertical distribution when using PRM injection heights from GFAS compared to aerosols emissions being prescribed at the surface. The globally available GFAS injection heights introduced and evaluated in this study provide a comprehensive data set for future fire and atmospheric composition modelling studies.
Osteopathic Medical Student Practice of Osteopathic Manipulative Treatment During School Break
Authors: Pierce-Talsma Stacey , Hiserote R. Mitchell , Lund Gregg 
Published: February 2017

Abstract

Context: Osteopathic manipulative treatment (OMT) is integral in osteopathic medical education. The timing of the loss of interest, leading to decreasing clinical use, is unclear. Osteopathic medical students’ activities during laboratories or rotations are determined by laboratory or preceptor requirements and do not characterize students’ interest in or how they value OMT. Students who practice OMT when they are not required to may demonstrate that they are interested in, perceive a positive value of, and have confidence in using OMT.

Objective: To characterize preclinical students practicing OMT during their school break.

Methods: First- and second-year students at the Touro University College of Osteopathic Medicine-CA and the University of New England College of Osteopathic Medicine were surveyed about whether they practiced OMT during winter break, types of conditions addressed, OMT technique(s) used, their practice partners’ response to OMT, and reasons for not practicing OMT, if applicable. Students were also asked if they would have practiced more OMT if they had setups similar to those of the practice environment at school.

Results: Of the 499 surveys sent, 407 (81.6%) were returned. Of 407 students, 269 (66.1%) reported that they practiced OMT during winter break, and they used a full range of OMT techniques. Students reported a total of 551 practice partners and 602 complaints. Overall, 429 of 497 practice partners (86.3%) reported they were much improved or improved, and 6 of 497 (1.2%) felt worse or much worse. The most common reasons for not practicing OMT were that no one had complaints (56.3%) and that there was no place to practice (37.3%).

Conclusion: More than half of surveyed students showed an interest in practicing OMT when it was not required of them. These findings may imply the need for curriculum changes at osteopathic medical schools to ensure student competency with using OMT techniques that take less time and can be done in a variety of settings and with discussing OMT with practice partners.
Rough versus smooth topography along oceanic hotspot tracks: Observations and scaling analysis
Authors: Orellana‐Rovirosa Felipe , Richards Mark 
Published: February 2017

AbstractSome hotspot tracks are topographically smooth and broad (Nazca, Carnegie/Cocos/Galápagos, Walvis, Iceland), while others are rough and discontinuous (Easter/Sala y Gomez, Tristan‐Gough, Louisville, St. Helena, Hawaiian‐Emperor). Smooth topography occurs when the lithospheric age at emplacement is young, favoring intrusive magmatism, whereas rough topography is due to isolated volcanic edifices constructed on older/thicker lithosphere. The main controls on the balance of intrusive versus extrusive magmatism are expected to be the hotspot swell volume flux Qs, plate hotspot relative speed v, and lithospheric elastic thickness Te, which can be combined as a dimensionless parameter R = (Qs/v)1/2/Te, which represents the ratio of plume heat to the lithospheric heat capacity. Observational constraints show that, except for the Ninetyeast Ridge, R is a good predictor of topographic character: for R < 1.5 hotspot tracks are topographically rough and dominated by volcanic edifices, whereas for R > 3 they are smooth and dominated by intrusion.