bluuebunny/crossref_metadata_2025_split huggingface dataset:
Integrating Seismic Inversion and Petrophysical HRA Classes for Reservoir Modeling of Submarine Fluvial Channels
Authors: Ahmad Ammar , Khan Waqar A. , Baig Muhammad Zeeshan 
Published: November 2016

Abstract
In this paper a workflow is presented where seismic inversion facies probability trends along with facies classification from Heterogeneous Rock Analysis (HRA) have been integrated to model the submarine channels to slope fan lobe systems. The slope fans (which were dominantly showing a mix system i.e. sand – shale) and submarine channels were extremely heterogeneous in terms of facies classification. In addition both these depositional systems represented highly variable geomorphology, where fluvial channels ranged from minimum of 5 meters thickness to maximum 15 meters (which represented both amalgamated / stacked channels). The slope fans ranged from few 100's of meter spatial spread to 2 km with sand thickness ranging from 10 – 30 meters.
The challenge in this depositional setting was to map the channels and slope fans both on seismic dataset and then later on to accurately delineate their dimensions and geomorphology. In order to establish the realistic sand thickness parameters using simple geostatistical variograms along with trends maps were not enough therefore, seismic inversion fluvial channel probability cubes were used to determine both the vertical and spatial spread of these depositional patterns.
The petrophysical rock classes derived from the Heterogeneous Rock Analysis method captured the facies variation within these depositional systems very effectively. The HRA classes integrated with the core results captured 4 main rock classes which were; Sand Channels, Channel Levee and Proixmal Slope fan facies (dominantly sands) to distal shalier fractions.
These 4 (Four) facies were then integrated with the inverted seismic results to check for consistency if these were good enough to be calibrated. The seismic inversion resulted in the contruction of several different probability guided trends to maps the fluvial channels and the slope fans. These geomorphological patterns helped in the quantitative delineation of the fluvial channels to the slope fans.
The next step was to analyze the geomorphological parameters of these depositional systems in context of the seismic probability trends. As a result several different orders of fan systems were observed, the largest being several km wide and 2 – 4 km in length while the smallest fan lobes were documented to be having 100 – 200 m spread to 400 – 500 m length. The dimensions of these geobodies were then extracted and integrated into the reservoir model which very effectively captured the facies variation and spatial distribution of these depositional bodies initially based on the seismic inversion results.
The resulting model suggested that only one half of the analyzed reservoir section contained the good quality sands which displayed better communication and connectivity. These sands were then targeted for further field development and lead to the successful testing of the newly drilled well in the area which also lead to opening of a new area for field development.
Workflow for Static Pressure Correction in Gas Condensate Reservoirs – An Improved Approach
Authors: Ali Hamza , Akram Agha Hassan , Khan Waqar A. , Shah Abdur Rahman , Jibran Ali , Bajwa Ali Iqbal 
Published: November 2016

Abstract
In the wellbore, phase segregation and density changes become significant during gauge pressure measurements. Static pressure surveys capture this change in density, provided the gauge is stationed at different depths in the lower part of the tubing, where this change is most expected. These static pressures are then corrected to datum depth to determine the depletion across the field.
Conventionally, a one step pressure correction is used to correct the pressures from the gauge station to datum depth using the wellbore pressure gradient. This approach assumes that the same gradient exists, both in the reservoir and in the wellbore, which is generally not true in the case of gas condensate reservoirs, as well as oil & water producers.
This paper presents a two-step pressure correction workflow for gas condensate reservoirs.It proposes to establish a gradient from pressure measurements acquired from lower gauge stations, as segregated fluid density changes even in the liquid column. This is the wellbore gradient. It makes use of PVT parameters to determine the gradient developed by the reservoir fluid, which is independent of the wellbore gradient, to ensure that the correction to datum depth incorporates the actual reservoir conditions.
It was observed that two step correction, which makes use of reservoir fluid gradient in 2nd step, provides pressure values comparable with formation testing results in contrast to single step corrected pressures. This paper presents a step by step workflow and emphasizes how important it is to make use of actual reservoir conditions while correcting pressure measurements. Advantages and disadvantages of each correction method are also discussed
Improved Porosity – Permeability Relationship Using Data Mining Techniques
Authors: Bashir Muhammad Omer , Dahraj Naeem Ul. 
Published: November 2016

Abstract
It is normally understood in the industry that permeability and porosity are related but relationship can be strong or weak based on heterogeneity, anisotropy and lithology of the reservoir. So far linear models have been arbitrarily being tried to fit and matched with the data thereby resulting in a poor relationship. This paper seeks to explore data mining techniques for pattern recognition including Kohonen self-organizing maps and other unsupervised learning techniques.
Kohonen self-organizing maps and principal component analysis are applied over permeability –porosity data to first cluster the data into various sets. This data can then be linked back to the formations and a predictor can be built thereby giving a tool for reservoir characterization. Then a linear model is to be built with the linearity being assessed by Shapiro Wilk Test and Quantile – Quantile (Q-Q) plot.
This technique develops a relationship with a much better fit between permeability and porosity in respective ranges and thereby creating a higher cue-efficient of determination i.e. R squared value.
Cardiovascular Phenotypes in Children with CKD: The 4C Study
Authors: Schaefer Franz , Doyon Anke , Azukaitis Karolis , Bayazit Aysun , Canpolat Nur , Duzova Ali , Niemirska Ana , Sözeri Betul , Thurn Daniela , Anarat Ali , Ranchin Bruno , Litwin Mieczyslav , Caliskan Salim , Candan Cengiz , Baskin Esra , Yilmaz Ebru , Mir Sevgi , Kirchner Marietta , Sander Anja , Haffner Dieter , Melk Anette , Wühl Elke , Shroff Rukshana , Querfeld Uwe ,   for the 4C Study Consortium
Published: November 2016

Background and objectives
Cardiovascular disease is the most important comorbidity affecting long-term survival in children with CKD.

Design, setting, participants, & measurements
The Cardiovascular Comorbidity in Children with CKD Study is a multicenter, prospective, observational study in children ages 6–17 years old with initial GFR of 10–60 ml/min per 1.73 m2. The cardiovascular status is monitored annually, and subclinical cardiovascular disease is assessed by noninvasive measurements of surrogate markers, including the left ventricular mass index, carotid intima-media thickness, and central pulse wave velocity. We here report baseline data at study entry and an explorative analysis of variables associated with surrogate markers.

Results
A total of 737 patients were screened from October of 2009 to August of 2011 in 55 centers in 12 European countries, and baseline data were analyzed in 688 patients. Sixty-four percent had congenital anomalies of the kidney and urinary tract; 26.1% of children had uncontrolled hypertension (24-hour ambulatory BP monitoring; n=545), and the prevalence increased from 24.4% in CKD stage 3 to 47.4% in CKD stage 5. The prevalence of left ventricular hypertrophy was higher with each CKD stage, from 10.6% in CKD stage 3a to 48% in CKD stage 5. Carotid intima-media thickness was elevated in 41.6%, with only 10.8% of patients displaying measurements below the 50th percentile. Pulse wave velocity was increased in 20.1%. The office systolic BP SD score was the single independent factor significantly associated with all surrogate markers of cardiovascular disease. The intermediate end point score (derived from the number of surrogate marker measurements >95th percentile) was independently associated with a diagnosis of congenital anomalies of the kidney and urinary tract, time since diagnosis of CKD, body mass index, office systolic BP, serum phosphorus, and the hemoglobin level.

Conclusions
The baseline data of this large pediatric cohort show that surrogate markers for cardiovascular disease are closely associated with systolic hypertension and stage of CKD.
The Angry Earth
Authors: Barletti Juan Pablo Sarmiento 
Published: November 2016

AbstractIn this article, I argue for a broadening of the conceptualisation of wellbeing in the scholarly and policy literature on the topic. I do so as, despite the calls for the inclusion of place in analyses of wellbeing, the literature on the topic still carries a dominant conception of wellbeing as a measurable index based on Euro-American practices and discourses, with their associated views of humanity and nature. I will advance the discussion on wellbeing’s intimate connection to place and place-based consciousness through an ethnographic engagement with kametsa asaiki (‘living well together’), an ethos of wellbeing pursued by indigenous Ashaninka people in the Peruvian Amazon. This is a revealing context as Peru exemplifies how extractive development initiatives tend to misrecognise or underestimate their socio-natural consequences on local pursuits of wellbeing. I argue that an understanding of the role of place and place-based consciousness in wellbeing is key to enhancing the concept’s utility in policy and practice, especially due to its centrality in the United Nations Sustainable Development Goals. In doing so, I call for further ethnographic explorations of the link between wellbeing models and understandings of humanity and nature.
THE CORONAL LOOP INVENTORY PROJECT: EXPANDED ANALYSIS AND RESULTS
Authors: Schmelz J. T. , Christian G. M. , Chastain R. A. 
Published: November 2016

ABSTRACT
We have expanded upon earlier work that investigates the relative importance of coronal loops with isothermal versus multithermal cross-field temperature distributions. These results are important for determining if loops have substructure in the form of unresolved magnetic strands. We have increased the number of loops targeted for temperature analysis from 19 to 207 with the addition of 188 new loops from multiple regions. We selected all loop segments visible in the 171 Å images of the Atmospheric Imaging Assembly (AIA) that had a clean background. Eighty-six of the new loops were rejected because they could not be reliably separated from the background in other AIA filters. Sixty-one loops required multithermal models to reproduce the observations. Twenty-eight loops were effectively isothermal, that is, the plasma emission to which AIA is sensitive could not be distinguished from isothermal emission, within uncertainties. Ten loops were isothermal. Also, part of our inventory was one small flaring loop, one very cool loop whose temperature distribution could not be constrained by the AIA data, and one loop with inconclusive results. Our survey can confirm an unexpected result from the pilot study: we found no isothermal loop segments where we could properly use the 171-to-193 ratio method, which would be similar to the analysis done for many loops observed with TRACE and EIT. We recommend caution to observers who assume the loop plasma is isothermal, and hope that these results will influence the direction of coronal heating models and the effort modelers spend on various heating scenarios.
ALMA REVEALS THE ANATOMY OF THE mm-SIZED DUST AND MOLECULAR GAS IN THE HD 97048 DISK
Authors: Walsh Catherine , Juhász Attila , Meeus Gwendolyn , Dent William R. F. , Maud Luke T. , Aikawa Yuri , Millar Tom J. , Nomura Hideko 
Published: November 2016

ABSTRACT
Transitional disks show a lack of excess emission at infrared wavelengths due to a large dust cavity, that is often corroborated by spatially resolved observations at ∼ mm wavelengths. We present the first spatially resolved ∼ mm-wavelength images of the disk around the Herbig Ae/Be star, HD 97048. Scattered light images show that the disk extends to ≈640 au. ALMA data reveal a circular-symmetric dusty disk extending to ≈350 au, and a molecular disk traced in CO J = 3-2 emission, extending to ≈750 au. The CO emission arises from a flared layer with an opening angle ≈30°–40°. HD 97048 is another source for which the large (∼ mm-sized) dust grains are more centrally concentrated than the small (∼μm-sized) grains and molecular gas, likely due to radial drift. The images and visibility data modeling suggest a decrement in continuum emission within ≈50 au, consistent with the cavity size determined from mid-infrared imaging (34 ± 4 au). The extracted continuum intensity profiles show ring-like structures with peaks at ≈50, 150, and 300 au, with associated gaps at ≈100 and 250 au. This structure should be confirmed in higher-resolution images (FWHM ≈ 10–20 au). These data confirm the classification of HD 97048 as a transitional disk that also possesses multiple ring-like structures in the dust continuum emission. Additional data are required at multiple and well-separated frequencies to fully characterize the disk structure, and thereby constrain the mechanism(s) responsible for sculpting the HD 97048 disk.
TESTING RELATIVISTIC REFLECTION AND RESOLVING OUTFLOWS IN PG 1211+143 WITH XMM-NEWTON AND NuSTAR
Authors: Lobban A. P. , Pounds K. , Vaughan S. , Reeves J. N. 
Published: November 2016

ABSTRACT
We analyze the broad-band X-ray spectrum (0.3–50 keV) of the luminous Seyfert 1/quasar PG 1211+143—the archetypal source for high-velocity X-ray outflows—using near-simultaneous XMM-Newton and NuSTAR observations. We compare pure relativistic reflection models with a model including the strong imprint of photoionized emission and absorption from a high-velocity wind, finding a spectral fit that extrapolates well over the higher photon energies covered by NuSTAR. Inclusion of the high signal-to-noise ratio XMM-Newton spectrum provides much tighter constraints on the model parameters, with a much harder photon index/lower reflection fraction compared to that from the NuSTAR data alone. We show that pure relativistic reflection models are not able to account for the spectral complexity of PG 1211+143 and that wind absorption models are strongly required to match the data in both the soft X-ray and Fe K spectral regions. In confirming the significance of previously reported ionized absorption features, the new analysis provides a further demonstration of the power of combining the high throughput and resolution of long-look XMM-Newton observations with the unprecedented spectral coverage of NuSTAR.
X-RAY DETECTED ACTIVE GALACTIC NUCLEI IN DWARF GALAXIES AT 0 < z < 1
Authors: Pardo K. , Goulding A. D. , Greene J. E. , Somerville R. S. , Gallo E. , Hickox R. C. , Miller B. P. , Reines A. E. , Silverman J. D. 
Published: November 2016

ABSTRACT
We present a sample of accreting supermassive black holes (SMBHs) in dwarf galaxies at

. We identify dwarf galaxies in the NEWFIRM Medium Band Survey with stellar masses of

that have spectroscopic redshifts from the DEEP2 survey and lie within the region covered by deep (flux limit of

) archival Chandra X-ray data. From our sample of 605 dwarf galaxies, 10 exhibit X-ray emission consistent with that arising from active galactic nucleus (AGN) activity. If black-hole mass scales roughly with stellar mass, then we expect that these AGNs are powered by SMBHs with masses of

and typical Eddington ratios of

. Furthermore, we find an AGN fraction consistent with extrapolations of other searches of

for

and

. Our AGN fraction is in good agreement with a semi-analytic model, suggesting that, as we search larger volumes, we may use comparisons between observed AGN fractions and models to understand seeding mechanisms in the early universe.
A NON-PARAMETRIC APPROACH TO CONSTRAIN THE TRANSFER FUNCTION IN REVERBERATION MAPPING
Authors: Li Yan-Rong , Wang Jian-Min , Bai Jin-Ming 
Published: November 2016

ABSTRACT
Broad emission lines of active galactic nuclei stem from a spatially extended region (broad-line region, BLR) that is composed of discrete clouds and photoionized by the central ionizing continuum. The temporal behaviors of these emission lines are blurred echoes of continuum variations (i.e., reverberation mapping, RM) and directly reflect the structures and kinematic information of BLRs through the so-called transfer function (also known as the velocity-delay map). Based on the previous works of Rybicki and Press and Zu et al., we develop an extended, non-parametric approach to determine the transfer function for RM data, in which the transfer function is expressed as a sum of a family of relatively displaced Gaussian response functions. Therefore, arbitrary shapes of transfer functions associated with complicated BLR geometry can be seamlessly included, enabling us to relax the presumption of a specified transfer function frequently adopted in previous studies and to let it be determined by observation data. We formulate our approach in a previously well-established framework that incorporates the statistical modeling of continuum variations as a damped random walk process and takes into account long-term secular variations which are irrelevant to RM signals. The application to RM data shows the fidelity of our approach.
CATASTROPHIC DISRUPTION OF COMET ISON
Authors: Keane Jacqueline V. , Milam Stefanie N. , Coulson Iain M. , Kleyna Jan T. , Sekanina Zdenek , Kracht Rainer , Riesen Timm-Emmanuel , Meech Karen J. , Charnley Steven B. 
Published: November 2016

ABSTRACT
We report submillimeter 450 and 850 μm dust continuum observations for comet C/2012 S1 (ISON) obtained at heliocentric distances 0.31–0.08 au prior to perihelion on 2013 November 28 (r

h
= 0.0125 au). These observations reveal a rapidly varying dust environment in which the dust emission was initially point-like. As ISON approached perihelion, the continuum emission became an elongated dust column spread out over as much as 60″ (>105 km) in the anti-solar direction. Deconvolution of the November 28.04 850 μm image reveals numerous distinct clumps consistent with the catastrophic disruption of comet ISON, producing ∼5.2 × 1010 kg of submillimeter-sized dust. Orbital computations suggest that the SCUBA-2 emission peak coincides with the comet's residual nucleus.
GALEX–SDSS–WISE LEGACY CATALOG (GSWLC): STAR FORMATION RATES, STELLAR MASSES, AND DUST ATTENUATIONS OF 700,000 LOW-REDSHIFT GALAXIES
Authors: Salim Samir , Lee Janice C. , Janowiecki Steven , Cunha Elisabete da , Dickinson Mark , Boquien Médéric , Burgarella Denis , Salzer John J. , Charlot Stéphane 
Published: November 2016

ABSTRACT
In this paper, we present the GALEX–SDSS–WISE Legacy Catalog (GSWLC), a catalog of physical properties (stellar masses, dust attenuations, and star formation rates [SFRs]) for ∼700,000 galaxies with Sloan Digital Sky Survey (SDSS) redshifts below 0.3. GSWLC contains galaxies within the Galaxy Evolution Explorer footprint, regardless of a UV detection, covering 90% of SDSS. The physical properties were obtained from UV/optical spectral energy distribution (SED) fitting following Bayesian methodology of Salim et al., with improvements such as blending corrections for low-resolution UV photometry, flexible dust attenuation laws, and emission-line corrections. GSWLC also includes mid-IR SFRs derived from IR templates based on 22

Wide-field Infrared Survey Explorer observations. These estimates are independent of UV/optical SED fitting, in order to separate possible systematics. The paper argues that the comparison of specific SFRs (sSFRs) is more informative and physically motivated than the comparison of SFRs. The sSFRs resulting from the UV/optical SED fitting are compared to the mid-IR sSFRs and to sSFRs from three published catalogs. For “main-sequence” galaxies with no active galactic nucleus (AGN) all sSFRs are in very good agreement (within 0.1 dex on average). In particular, the widely used aperture-corrected SFRs from the MPA/JHU catalog show no systematic offsets, in contrast to some integral field spectroscopy results. For galaxies below the main sequence (log sSFR

), mid-IR (s)SFRs based on fixed luminosity–SFR conversion are severely biased (up to 2 dex) because the dust is primarily heated by old stars. Furthermore, mid-IR (s)SFRs are overestimated by up to 0.6 dex for galaxies with AGNs, presumably due to nonstellar dust heating. UV/optical (s)SFRs are thus preferred to IR-based (s)SFRs for quenched galaxies and those that host AGNs.
Seamless language learning: Second language learning with social media
Authors: Wong Lung-Hsiang , Sing-Chai Ching , Poh-Aw Guat 
Published: November 2016

This conceptual paper describes a language learning model that applies social media to foster contextualized and connected language learning in communities. The model emphasizes weaving together different forms of language learning activities that take place in different learning contexts to achieve seamless language learning. It promotes social interactions with social media about the learners’ day-to-day life using the targeted second or foreign language. The paper first identifies three key features of the language learning approach, namely, authenticity, contextualization and socialization. How these features are related to the communicative approach of language learning are subsequently explicated. This is followed by further explication on how the notion of seamless language learning could inform learning designers and learners in synergizing the desired characteristics of language learning together. Eventually, we propose the SMILLA (Social MedIa as Language Learning Artifacts) Framework to operationalize seamless language learning with the use of social media. A case of seamless language learning environment design known as MyCloud will be described to illustrate the practicality of the SMILLA Framework.
Este artículo describe un modelo de aprendizaje de lenguas que se sirve de las redes sociales para promover un aprendizaje contextualizado y conectado en comunidades. El modelo propone la interconexión entre diferentes tipos de actividades de aprendizaje en contextos diversos con el objetivo de lograr un aprendizaje discontinuo. Promueve las interacciones sociales a través de los medios compartiendo aspectos de la vida cotidiana en la lengua meta. Este trabajo identifica en primer lugar aspectos clave del enfoque de aprendizaje tales como la autenticidad, la contextualización y la socialización, al tiempo que explica cómo se relacionan estos aspectos con el enfoque comunicativo en el aprendizaje de lenguas. A continuación se presenta una discusión acerca de cómo la noción de aprendizaje discontinuo puede orientar a los creadores de materiales, docentes y aprendientes en la sinergia de todas las características del aprendizaje de lenguas. Para concluir, se propone el modelo SMILLA (Redes sociales como instrumentos para el aprendizaje de lenguas) para poner en práctica la noción de aprendizaje discontinuo con la ayuda de las redes sociales. Los resultados de su aplicación sugieren un potencial efecto sobre los aprendientes, generando usuarios más activos en contextos socialmente significativos, preparados para la autorreflexión sobre el uso que hacen de esa lengua, y con una menor necesidad de intervención del docente.