bluuebunny/crossref_metadata_2025_split huggingface dataset:
Overpowering posterior lumbar instrumentation and fusion with hyperlordotic anterior lumbar interbody cages followed by posterior revision: a preliminary feasibility study
Authors: Kadam Abhijeet , Wigner Nathan , Saville Philip , Arlet Vincent 
Published: September 2017

OBJECTIVEThe authors’ aim in this study was to evaluate whether sagittal plane correction can be obtained from the front by overpowering previous posterior instrumentation and/or fusion with hyperlordotic anterior lumbar interbody fusion (ALIF) cages in patients undergoing revision surgery for degenerative spinal conditions and/or spinal deformities.METHODSThe authors report their experience with the application of hyperlordotic cages at 36 lumbar levels for ALIFs in a series of 20 patients who underwent revision spinal surgery at a single institution. Included patients underwent staged front-back procedures: ALIFs with hyperlordotic cages (12°, 20°, and 30°) followed by removal of posterior instrumentation and reinstrumentation from the back. Patients were divided into the following 2 groups depending on the extent of posterior instrumentation and fusion during the second stage: long constructs (≥ 6 levels with extension into thoracic spine and/or pelvis) and short constructs (< 6 levels). Preoperative and postoperative standing radiographs were evaluated to measure segmental lordosis (SL) along with standard sagittal parameters. Radiographic signs of pseudarthrosis at previously fused levels were also sought in all patients.RESULTSThe average patient age was 54 years (range 30–66 years). The mean follow-up was 11.5 months (range 5–26 months). The mean SL achieved with 12°, 20°, and 30° cages was 13.1°, 19°, and 22.4°, respectively. The increase in postoperative SL at the respective surgically treated levels for 12°, 20°, and 30° cages that were used to overpower posterior instrumentation/fusion averaged 6.1° (p < 0.05), 12.5° (p < 0.05), and 17.7° (p < 0.05), respectively. No statistically significant difference was found in SL correction at levels in patients who had pseudarthrosis (n = 18) versus those who did not (n = 18). The mean overall lumbar lordosis increased from 44.3° to 59.8° (p < 0.05). In the long-construct group, the mean improvement in sagittal vertical axis was 85.5 mm (range 19–249.3 mm, p < 0.05). Endplate impaction/collapse was noted in 3 of 36 levels (8.3%). The anterior complication rate was 13.3%. No neurological complications or vascular injuries were observed.CONCLUSIONSALIF in which hyperlordotic cages are used to overpower posterior spinal instrumentation and fusion can be expected to produce an increase in SL of a magnitude that is roughly half of the in-built cage lordotic angle. This technique may be particularly suited for lordosis correction from the front at lumbar levels that have pseudarthrosis from the previous posterior spinal fusion. Meticulous selection of levels for ALIF is crucial for safely and effectively performing this technique.
Characterization of Near-Earth Asteroids Using KMTNET-SAAO
Authors: Erasmus N. , Mommert M. , Trilling D. E. , Sickafoose A. A. , van Gend C. , Hora J. L. 
Published: September 2017

Abstract
We present here VRI spectrophotometry of 39 near-Earth asteroids (NEAs) observed with the Sutherland, South Africa, node of the Korea Microlensing Telescope Network (KMTNet). Of the 39 NEAs, 19 were targeted, but because of KMTNet’s large 2° × 2° field of view, 20 serendipitous NEAs were also captured in the observing fields. Targeted observations were performed within 44 days (median: 16 days, min: 4 days) of each NEA’s discovery date. Our broadband spectrophotometry is reliable enough to distinguish among four asteroid taxonomies and we were able to confidently categorize 31 of the 39 observed targets as either an S-, C-, X-, or D-type asteroid by means of a Machine Learning algorithm approach. Our data suggest that the ratio between “stony” S-type NEAs and “not-stony” (C+X+D)-type NEAs, with H magnitudes between 15 and 25, is roughly 1:1. Additionally, we report ∼1 hr light curve data for each NEA, and of the 39 targets, we were able to resolve the complete rotation period and amplitude for six targets and report lower limits for the remaining targets.
Determining Exoplanetary Oblateness Using Transit Depth Variations
Authors: Biersteker John , Schlichting Hilke 
Published: September 2017

Abstract
The measurement of an exoplanet’s oblateness and obliquity provides insights into the planet’s internal structure and formation history. Previous work using small differences in the shape of the transit light curve has been moderately successful, but was hampered by the small signal and extreme photometric precision required. The measurement of changes in transit depth, caused by the spin precession of an oblate planet, was proposed as an alternative method. Here, we present the first attempt to measure these changes. Using Kepler photometry, we examined the brown dwarf Kepler-39b and the warm Saturn Kepler-427b. We could not reliably constrain the oblateness of Kepler-39b. We find transit depth variations for Kepler-427b at

significance (

) consistent with a precession period of

and an oblateness of

. This oblateness is comparable to solar system gas giants and would raise questions about the dynamics and tidal synchronization of Kepler-427b.
Deep Full-sky Coadds from Three Years of WISE and NEOWISE Observations
Authors: Meisner A. M. , Lang D. , Schlegel D. J. 
Published: September 2017

Abstract
We have reprocessed over 100 terabytes of single-exposure Wide-field Infrared Survey Explorer (WISE)/NEOWISE images to create the deepest ever full-sky maps at 3–5 microns. We include all publicly available W1 and W2 imaging—a total of ∼8 million exposures in each band—from ∼37 months of observations spanning 2010 January to 2015 December. Our coadds preserve the native WISE resolution and typically incorporate ∼3× more input frames than those of the AllWISE Atlas stacks. Our coadds are designed to enable deep forced photometry, in particular for the Dark Energy Camera Legacy Survey (DECaLS) and Mayall z-Band Legacy Survey (MzLS), both of which are being used to select targets for the Dark Energy Spectroscopic Instrument. We describe newly introduced processing steps aimed at leveraging added redundancy to remove artifacts, with the intent of facilitating uniform target selection and searches for rare/exotic objects (e.g., high-redshift quasars and distant galaxy clusters). Forced photometry depths achieved with these coadds extend 0.56 (0.46) magnitudes deeper in W1 (W2) than is possible with only pre-hibernation WISE imaging.
Details of Resonant Structures within a Nice Model Kuiper Belt: Predictions for High-perihelion TNO Detections
Authors: Pike R. E. , Lawler S. M. 
Published: September 2017

Abstract
We analyze a detailed Nice model simulation of Kuiper Belt emplacement from Brasser & Morbidelli, where Neptune undergoes a high-eccentricity phase and migrates outward. In this work, which follows from Pike et al., we specifically focus on the details of structures within Neptune’s mean-motion resonances and in the high-pericenter population of simulated trans-Neptunian objects (TNOs). We find several characteristics of these populations that should be observable in the distant solar system in future large-scale TNO surveys as a diagnostic of whether or not this mode of Neptune migration occurred in the early solar system. We find that the leading asymmetric libration islands of the n:1 resonances are generally much more populated than the trailing islands. We also find the nonresonant high-q population of TNOs should have higher inclinations than the low-q population due to the importance of Kozai cycling during their emplacement histories. Finally, high-q TNOs should be present in roughly equal numbers on either side of distant mean-motion resonances. These predictions contrast with predictions from other Kuiper Belt emplacement simulations and will be testable by upcoming surveys.
The Hunt for Red Quasars: Luminous Obscured Black Hole Growth Unveiled in the Stripe 82 X-Ray Survey
Authors: LaMassa Stephanie M. , Glikman Eilat , Brusa Marcella , Rigby Jane R. , Ananna Tonima Tasnim , Stern Daniel , Lira Paulina , Urry C. Megan , Salvato Mara , Alexandroff Rachael , Allevato Viola , Cardamone Carolin , Civano Francesca , Coppi Paolo , Farrah Duncan , Komossa S. , Lanzuisi Giorgio , Marchesi Stefano , Richards Gordon , Trakhtenbrot Benny , Treister Ezequiel 
Published: September 2017

Abstract
We present results of a ground-based near-infrared campaign with Palomar TripleSpec, Keck NIRSPEC, and Gemini GNIRS to target two samples of reddened active galactic nucleus (AGN) candidates from the 31 deg2 Stripe 82 X-ray survey. One sample, which is ∼89% complete to

(Vega), consists of eight confirmed AGNs, four of which were identified with our follow-up program, and is selected to have red R − K colors (

, Vega). The fainter sample (

, Vega) represents a pilot program to follow-up four sources from a parent sample of 34 that are not detected in the single-epoch SDSS catalog and have WISE quasar colors. All 12 sources are broad-line AGNs (at least one permitted emission line has an FWHM exceeding 1300 km s−1) and span a redshift range

. Half the (R − K)-selected AGNs have features in their spectra suggestive of outflows. When comparing these sources to a matched sample of blue Type 1 AGNs, we find that the reddened AGNs are more distant (

), and a greater percentage have high X-ray luminosities (

erg s−1). Such outflows and high luminosities may be consistent with the paradigm that reddened broad-line AGNs represent a transitory phase in AGN evolution as described by the major merger model for black hole growth. Results from our pilot program demonstrate proof of concept that our selection technique is successful in discovering reddened quasars at

missed by optical surveys.
Robo-AO Kepler Asteroseismic Survey. I. Adaptive Optics Imaging of 99 Asteroseismic Kepler Dwarfs and Subgiants
Authors: Schonhut-Stasik Jessica S. , Baranec Christoph , Huber Daniel , Ziegler Carl , Atkinson Dani , Gaidos Eric , Law Nicholas M. , Riddle Reed , Hagelberg Janis , Marel Nienke van der , Hodapp Klaus W. 
Published: September 2017

Abstract
We used the Robo-AO laser adaptive optics (AOs) system to image 99 main sequence and subgiant stars that have Kepler-detected asteroseismic signals. Robo-AO allows us to resolve blended secondary sources at separations as close as ∼0.″15 that may contribute to the measured Kepler light curves and affect asteroseismic analysis and interpretation. We report eight new secondary sources within 4.″0 of these Kepler asteroseismic stars. We used Subaru and Keck AOs to measure differential infrared photometry for these candidate companion systems. Two of the secondary sources are likely foreground objects, while the remaining six are background sources; however, we cannot exclude the possibility that three of the objects may be physically associated. We measured a range of i′-band amplitude dilutions for the candidate companion systems from 0.43% to 15.4%. We find that the measured amplitude dilutions are insufficient to explain the previously identified excess scatter in the relationship between asteroseismic oscillation amplitude and the frequency of maximum power.
Non-local Thermodynamic Equilibrium Abundance Analyses of the Extreme Helium Stars V652 Her and HD 144941
Authors: Pandey Gajendra , Lambert David L. 
Published: September 2017

Abstract
Optical high-resolution spectra of V652 Her and HD 144941, the two extreme helium stars with exceptionally low C/He ratios, have been subjected to a non-LTE abundance analysis using the tools TLUSTY and SYNSPEC. Defining atmospheric parameters were obtained from a grid of non-LTE atmospheres and a variety of spectroscopic indicators including He i and He ii line profiles, and the ionization equilibrium of ion pairs such as C ii/C iii and N ii/N iii. The various indicators provide a consistent set of atmospheric parameters: T
eff = 25,000 ± 300 K, log g = 3.10 ± 0.12(cgs), and ξ = 13 ± 2 km s−1 are provided for V652 Her, and T
eff = 22,000 ± 600 K, log g = 3.45 ± 0.15 (cgs), and ξ = 10 km s−1 are provided for HD 144941. In contrast to the non-LTE analyses, the LTE analyses—LTE atmospheres and an LTE line analysis—with the available indicators do not provide a consistent set of atmospheric parameters. The principal non-LTE effect on the elemental abundances is on the neon abundance. It is generally considered that these extreme helium stars with their very low C/He ratio result from the merger of two helium white dwarfs. Indeed, the derived composition of V652 Her is in excellent agreement with predictions by Zhang & Jeffery, who model the slow merger of helium white dwarfs; a slow merger results in the merged star having the composition of the accreted white dwarf. In the case of HD 144941, which appears to have evolved from metal-poor stars, a slow merger is incompatible with the observed composition but variations of the merger rate may account for the observed composition. More detailed theoretical studies of the merger of a pair of helium white dwarfs are to be encouraged.
Le tournant environnemental en Amazonie : ampleur et limites du découplage entre production et déforestation
Authors: Laurent François , Arvor Damien , Daugeard Marion , Osis Reinis , Tritsch Isabelle , Coudel Emilie , Piketty Marie-Gabrielle , Piraux Marc , Viana Cecilia , Dubreuil Vincent , Hasan Ali F. , Messner François 
Published: September 2017

L’Amazonie a amorcé depuis quelques années une baisse de la déforestation couplée à un développement économique. Le processus est cependant inégal. Si les grands et moyens producteurs font évoluer leurs systèmes de production vers l’intensification et la diversification dans les espaces déjà ouverts, délaissant en apparence les stratégies d’expansion, l’agriculture familiale reste à l’écart du découplage entre production et déforestation. Dans cet article, les engagements des pouvoirs publics et des filières, leurs effets en matière de déforestation et les inégalités d’adaptation sont analysés à l’échelle de l’Amazonie Légale et à celle d’une municipalité considérée comme un modèle car à l’initiative d’une démarche de Município Verde : Paragominas, en Amazonie orientale.
Les effets des équipements hydroélectriques en Amazonie
Authors: Broggio Céline , Droulers Martine 
Published: September 2017

Cet article s’intéresse aux effets à moyen et long terme des barrages et usines hydroélectriques implantés en Amazonie brésilienne depuis les années 1980 sur la réorganisation des territoires environnants. Les équipements hydroélectriques constituent un aspect du front pionnier amazonien. Suite aux perturbations importantes provoquées par leur installation, un processus de résilience territoriale s’engage dans un contexte de post-front pionnier. L’analyse du cas du barrage de Tucurui (État du Pará) peut-elle, avec trente ans de recul, apporter des éléments de réflexion sur la situation actuelle dans la région de Porto Velho (État du Rondonia) où deux grandes usines hydroélectriques (Santo Antônio et Jirau) ont été installées à la fin des années 2000 ?
L’espace du politique ou la politique de l’espace : l’éviction des quartiers populaires et les Jeux olympiques de Rio de Janeiro
Authors: Zanotelli Cláudio 
Published: September 2017

L’article mobilise le concept d’espace politique pour révéler les contradictions insurmontables par bien des aspects entre le « droit de la ville » et le « droit à la ville » au Brésil. Pour ce faire, il portera sur le cas emblématique du quartier de Vila Autódromo, à Rio de Janeiro. Dans le cadre de l’accueil des Jeux Olympiques de 2016 à Rio, des travaux d’aménagement pour la mise en place du Parc olympique et du quartier des logements des athlètes et de ses environs ont bouleversé l’espace de l’ouest de Rio, en particulier les quartiers de Barra da Tijuca et Jacarépagua. Vila Autodromo est un quartier populaire sous-intégré et enclavé à proximité du Parc olympique et a été en bonne partie démoli par la ville avant les Jeux. Ce qui s’est passé à Vila Autodromo illustre, selon nous, la structure des rapports inégaux et iniques qui existent au Brésil par rapport au droit à la ville. Il s’agira de montrer comment le droit de la ville, les plans et les projets de l’État, instrumentalisent le Droit et la Justice dans une démarche de stigmatisation et d’exclusion des plus pauvres des zones valorisées par des infrastructures et des équipements.
Une ontologie du commandement ?
Authors: David Hugo 
Published: September 2017

On s’intéresse dans cet article à la contribution d’auteurs issus de l’exégèse scripturaire brahmanique (en sanskrit : Mīmāṃsā) à l’histoire de l’ontologie dans l’Inde du premier millénaire. Ce faisant, on cherche à mieux comprendre ce que signifie « philosopher » pour ces intellectuels voués à l’interprétation, dans une perspective ritualiste, d’un texte jugé comme éternel et infaillible. Le point de départ de l’enquête est l’opposition entre deux conceptions rivales de l’être (sattā), apparues simultanément au tournant des viie et viiie siècles au sein de cette école : l’être compris comme présence, l’être envisagé comme propriété de l’objet d’une connaissance valide. Après avoir brièvement caractérisé ces deux thèses (Section 1), on s’efforce de les situer au croisement de deux problématiques qui concernent le statut du Texte Sacré, à savoir la compréhension du caractère « hors normes » de l’objet du Veda (Section 2) et l’interprétation du phénomène linguistique du commandement (vidhi ou niyoga), central s’agissant d’un texte considéré comme essentiellement normatif (Section 3). L’hypothèse ici défendue est que cette double matrice, herméneutique et linguistique, occasionne l’élaboration controversée d’une « ontologie du commandement » et justifie de ce fait l’irruption des exégètes dans un domaine métaphysique réservé jusqu’alors aux tenant des philosophies « naturelles ».
Older Adults Rate Their Mental Health Better than Their General Health
Authors: Magwene Elena M. , Quiñones Ana R. , Marshall Gillian L. , Makaroun Lena K. , Thielke Stephen 
Published: September 2017

Background Self-rated health (SRH) shows strong associations with measures of health and well-being. Increasingly, studies have used self-rated mental health (SRMH) as a predictor of various outcomes, independently or together with SRH. Research has not firmly established if and how these two constructs differ. We sought to characterize the relationship between SRH and SRMH, and to determine how this relationship differed across subgroups defined by sociodemographic and health-related characteristics. Design and methods We analyzed data from the 2012 CAHPS Medicare Advantage Survey. SRH and SRMH ratings were crosstabulated to determine the distribution of responses across response categories. The expected joint probability distribution was computed and compared to the observed distribution. A constructed variable indicated whether SRMH was better, the same, or worse than SRH. We analyzed the distribution of this variable across various subgroups defined by sociodemographic and health-related factors. Results A total of 114,905 Medicare Advantage beneficiaries responded to both the SRH and SRMH questions. Both in general and within all subgroups, SRMH was usually rated as better than SRH, and rarely as worse. Conclusions Within a large group of Medicare recipients, the overwhelming trend was for recipients to rate their mental health as at least as good as their overall health, regardless of any sociodemographic and health-related factors. This finding of a shifted distribution encourages caution in the analytic use of selfrated mental health, particularly the use of both SRH and SRMH for adjustment. Additional research is needed to help clarify the complex relationship between these variables.
Estudio del flujo neutrónico en un reactor cilíndrico
Authors: Vidal-Ferràndiz A. , Carlos Sofia , Verdú G. 
Published: September 2017

<p>Dentro del Grado de Ingeniería de la Energía, impartido en la Universitat Politècnica de València, se encuentra la asignatura de Tecnología Nuclear, en la que los alumnos adquieren los conocimientos básicos sobre esta tecnología. Un objetivo primordial en este tipo de generación energética es el conocimiento de la distribución de la población neutrónica dentro de un reactor, con la finalidad de mantener la reacción en cadena. Es evidente que esta actividad no puede desarrollarse de forma experimental, por lo que los modelos matemáticos son de gran importancia para lograr este objetivo. Así, una de las prácticas que se propone a los alumnos es la obtención del perfil del flujo neutrónico en una geometría cilíndrica, que es un modelo aproximado del núcleo de un reactor, de forma analítica aprovechando para introducirlas funciones de Bessel y dar un ejemplo de su utilización. Como método alternativo para obtener una aproximación de la solución del problema se utiliza el método de diferencias finitas. Se estudian distintas discretizaciones del reactor cilíndrico y se comparan las soluciones obtenidas.</p>
Mishaps of Larynx in Pregnancy
Authors: Jain Ankit , Desai Binhi H 
Published: September 2017

ABSTRACT
Pregnancy leading to hoarseness and stridor is not uncommon. It is usually a consequence of associated physiological changes and hence, reverts back to normalcy in postpartum. Pregnancy-induced stridor may rarely require a tracheostomy. Such a situation presents many challenges not only during the antenatal period but also during labor and the postpartum period.
In this article, we have presented three cases of hoarseness during pregnancy and a discussion on their management with a review of literature.
How to cite this article
Nerurkar NK, Desai BH, Jain A. Mishaps of Larynx in Pregnancy. Int J Phonosurg Laryngol 2017;7(1):36-38.