bluuebunny/crossref_metadata_2025_split huggingface dataset:
Are RRab stars fully radial?
Authors: Benkő József M. , Szabó Róbert 
Published: February 2014

AbstractThanks to the space missions CoRoT and Kepler new oscillation frequencies have been discovered in the Fourier spectra of Blazhko RR Lyrae stars. The period doubling (PD) yields half-integer frequencies between the fundamental mode and its harmonics. In many cases the first and/or second radial overtone frequencies also appear temporally. Some stars show extra frequencies that were identified as potential non-radial modes. We show here that all these frequencies can be explained by pure radial pulsation as linear combinations of the frequencies of radial fundamental and overtone modes.
Strömgren photometry and medium-resolution spectroscopy of some δ Scuti and γ Doradus stars in the Kepler field
Authors: Fox-Machado L. 
Published: February 2014

AbstractWe have obtained CCD photometry and medium-resolution spectroscopy of a number of δ Scuti and γ Doradus stars in the Kepler field-of-view as part of the ground-based observational efforts to support the Kepler space mission. In this work we present the preliminary results of these observations.
KIC 6761539, a fast rotating γ Dor – δ Sct hybrid star
Authors: Herzberg W. , Corre D. , Uytterhoeven K. , Roth M. 
Published: February 2014

AbstractKIC 6761539 is one of many fast rotating γ Doradus – δ Scuti hybrid pulsators. A search for possible regularities in the frequency spectrum is performed and a first stellar model is presented.
Study of BL Her type pulsating variable stars using publicly available photometric databases
Authors: Jurković Monika , Szabados László 
Published: February 2014

AbstractBL Her type pulsating variable stars are a subtype of Type II Cepheids, pulsating with periods in the range from 1 to 4 days. The General Catalog of Variable Stars lists 71 objects. For each star from this list, we searched for data in the publicly available photometric databases: AAVSO, ASAS, Catalina Sky Survey, INTEGRAL OMC, LINEAR, NSVS, SuperWASP. The analysis was done separately for each dataset. Here we present first results.
KIC 10486425: A Kepler eclipsing binary system with a pulsating component
Authors: Aliçavuş Filiz Kahraman , Soydugan Esin 
Published: February 2014

AbstractWe present frequency analysis of the Kepler light curve of KIC 10486425, an eclipsing binary system with a pulsating component. The parameters of the binary were obtained by modelling the light curve with the Wilson-Devinney program. The residuals from this modelling were subject to Fourier analysis which allowed us to detect 120 periodic terms characteristic for γ Dor-type pulsations. The dominant frequency of these changes amounts to 1.3189 d−1.
The rich frequency spectrum of the triple-mode variable AC And
Authors: Kovács Géza , Bakos Gáspár A. , Hartman Joel D. 
Published: February 2014

AbstractFourier analysis of the light curve of AC And from the HATNet database reveals the rich frequency structure of this object. Above 30 components are found down to the amplitude of 3 mmag. Several of these frequencies are not the linear combinations of the three basic components. We detect period increase in all three components that may lend support to the Population I classification of this variable.
LAMOST observations in the Kepler field
Authors: Molenda-Żakowicz Joanna , De Cat Peter , Fu Jian-Ning , Yang Xiao-Hu ,   the LAMOST-Kepler collaboration
Published: February 2014

AbstractWe present results of observations of 22 664 stars in the Kepler field of view acquired with the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) in the years 2011 – 2012, and provide a database of the atmospheric parameters derived from those data.
On the information content of stellar spectra
Authors: Schou Jesper 
Published: February 2014

AbstractWith the increasing quality of asteroseismic observations it is important to minimize the random and systematic errors in mode parameter estimates. To this end it is important to understand how the oscillations relate to the directly observed quantities, such as intensities and spectra, and to derived quantities, such as Doppler velocity. Here I list some of the effects we need to take into account and show an example of the impact of some of them.
Analysis of rosette modes of oscillations in rotating stars
Authors: Takata Masao , Saio Hideyuki 
Published: February 2014

AbstractWe analyse the rosette modes of oscillations in rotating stars, which are characterised by rosette patterns of the kinetic-energy distribution on the meridional plane. Following our previous argument that these modes are generated by the rotation-induced interaction among eigenmodes with almost the same frequency, we discuss the structure of the rosette patterns base on the JWKB analysis. We also demonstrate that there exist nonaxisymmetric rosette modes.
GYRE: A new open-source stellar oscillation code
Authors: Townsend Rich , Teitler Seth , Paxton Bill 
Published: February 2014

AbstractWe introduce GYRE, a new open-source stellar oscillation code which solves the adiabatic/non-adiabatic pulsation equations using a novel Magnus Multiple Shooting (MMS) numerical scheme. The code has a global error scaling of up to 6th order in the grid spacing, and can therefore achieve high accuracy with few grid points. It is moreover robust and efficiently makes use of multiple processor cores and/or nodes. We present an example calculation using GYRE, and discuss recent work to integrate GYRE into the asteroseismic optimization module of the MESA stellar evolution code.
A search for pulsations in two Algol-type systems V1241 Tau and GQ Dra
Authors: Ulaş Burak , Ulusoy Ceren , Gazeas Kosmas , Erkan Naci , Liakos Alexios 
Published: February 2014

AbstractWe present new photometric observations of two eclipsing binary systems, V1241 Tau and GQ Dra. We use the following methodology: initially, the Wilson-Devinney code is applied to the light curves in order to determine the photometric elements of the systems. Then, the residuals are analysed using Fourier techniques. The results are the following. One frequency can be possibly attributed to a real light variation of V1241 Tau, while there is no evidence of pulsations in the light curve of GQ Dra.
Normative Data for a Spanish Version of the Rey Auditory-Verbal Learning Test in Older People
Authors: Marqués Nuria Ortiz , Caro Imanol Amayra , Uterga Valiente Juan M. , Rodríguez Silvia Martínez 
Published: February 2014

AbstractThe Rey Auditory-Verbal Learning Test is an easy to administer test that assesses many memory domains and is, therefore, widely used in the area of clinical neuropsychology. The purpose of this study was to provide normative data for an elderly population living in Spain. The sample of this study was comprised of 156 volunteers over 60 years of age, which were grouped into six different age groups. These groups comprised of 10 participants between the ages of 61and 65 in the first group, 23 participants (66–70) in the second, 28 participants (71–75) in the third, 35 participants (76–80) in the fourth, 32 participants (81–85)in the fifth and 28 participants (86–95) in the sixth group. Demographic data were collected and means, deviations, and ranges of all the measures were evaluated. Normative data were calculated from the percentiles, and then converted into age-corrected scaled scores with a mean of 10 and a standard deviation of 3.
Atomic-scale mapping of dipole frustration at 90° charged domain walls in ferroelectric PbTiO3 films
Authors: Tang Y. L. , Zhu Y. L. , Wang Y. J. , Wang W. Y. , Xu Y. B. , Ren W. J. , Zhang Z. D. , Ma X. L. 
Published: February 2014

AbstractThe atomic-scale structural and electric parameters of the 90° domain-walls in tetragonal ferroelectrics are of technological importance for exploring the ferroelectric switching behaviors and various domain-wall-related novel functions. We have grown epitaxial PbTiO3/SrTiO3 multilayer films in which the electric dipoles at 90° domain-walls of ferroelectric PbTiO3 are characterized by means of aberration-corrected scanning transmission electron microscopy. Besides the well-accepted head-to-tail 90° uncharged domain-walls, we have identified not only head-to-head positively charged but also tail-to-tail negatively charged domain-walls. The widths, polarization distributions and strains across these charged domain-walls are mapped quantitatively at atomic scale, where remarkable difference between these domain-walls is presented. This study is expected to provide fundamental information for understanding numerous novel domain-wall phenomena in ferroelectrics.
miR-296/Scribble axis is deregulated in human breast cancer and miR-296 restoration reduces tumour growth in vivo
Authors: Savi Federica , Forno Irene , Faversani Alice , Luciani Andrea , Caldiera Sarah , Gatti Stefano , Foa Paolo , Ricca Dario , Bulfamante Gaetano , Vaira Valentina , Bosari Silvano 
Published: February 2014

miR-296-5p is a central regulator of signalling pathways affecting development, stem cell differentiation and cancer. We hypothesized that miR-296-5p is involved in breast cancer onset and progression possibly through regulation of its target SCRIB (Scribble), a polarity protein recently implicated in the acquisition of cancer stem cell traits and in cell motility. We found that miR-296-5p levels were consistently reduced in human breast cancer tissues compared with non-neoplastic mammary parenchyma, and low expression of this miRNA predicted shorter disease-free survival independently of classic clinicopathological parameters. Further, reduced miR-296-5p levels were significantly correlated with an earlier spread of cancer in the overall series and with distant metastases in the subset. In contrast with its regulator, SCRIB was overexpressed and mislocalized in primary breast cancers or locoregional or distant metastatic lesions compared with normal parenchyma. Notably, SCRIB mislocalization was associated with overall survival, metastatic spread and organ tropism in patients with breast cancer. Finally, direct injection of a precursor miR-296-5p into tumours of a breast cancer xenograft model significantly decreased tumour growth. Our results show that the miR-296-5p/SCRIB axis plays a role in breast carcinogenesis and an miR-296-5p-based therapeutic approach hampers breast cancer tumour growth in vivo. Modulation of miR-296-5p may represent a new therapeutic option for patients with breast cancer.
Extragalactic science, cosmology, and Galactic archaeology with the Subaru Prime Focus Spectrograph
Authors: Takada Masahiro , Ellis Richard S. , Chiba Masashi , Greene Jenny E. , Aihara Hiroaki , Arimoto Nobuo , Bundy Kevin , Cohen Judith , Doré Olivier , Graves Genevieve , Gunn James E. , Heckman Timothy , Hirata Christopher M. , Ho Paul , Kneib Jean-Paul , Fèvre Olivier Le , Lin Lihwai , More Surhud , Murayama Hitoshi , Nagao Tohru , Ouchi Masami , Seiffert Michael , Silverman John D. , Sodré Laerte , Spergel David N. , Strauss Michael A. , Sugai Hajime , Suto Yasushi , Takami Hideki , Wyse Rosemary 
Published: February 2014

Abstract
The Subaru Prime Focus Spectrograph (PFS) is a massively multiplexed fiber-fed optical and near-infrared three-arm spectrograph (Nfiber = 2400, 380 ≤ λ ≤ 1260 nm, 1 $_{.}^{\circ}$3 diameter field of view). Here, we summarize the science cases in terms of provisional plans for a 300-night Subaru survey. We describe plans to constrain the nature of dark energy via a survey of emission line galaxies spanning a comoving volume of 9.3 h−3 Gpc3 in the redshift range 0.8 &lt; z &lt; 2.4. In each of six redshift bins, the cosmological distances will be measured to 3% precision via the baryonic acoustic oscillation scale, and redshift-space distortion measures will constrain structure growth to 6% precision. In the near-field cosmology program, radial velocities and chemical abundances of stars in the Milky Way and M 31 will be used to infer the past assembly histories of spiral galaxies and the structure of their dark matter halos. Data will be secured for 106 stars in the Galactic thick-disk, halo, and tidal streams as faint as V ∼ 22, including stars with V &lt; 20 to complement the goals of the Gaia mission. A medium-resolution mode with R = 5000 to be implemented in the red arm will allow the measurement of multiple α-element abundances and more precise velocities for Galactic stars. For the galaxy evolution program, our simulations suggest the wide wavelength range of PFS will be powerful in probing the galaxy population and its clustering over a wide redshift range. We plan to conduct a color-selected survey of 1 &lt; z &lt; 2 galaxies and AGN over 16 deg2 to J ≃ 23.4, yielding a fair sample of galaxies with stellar masses above ∼1010 M⊙ at z ≃ 2. A two-tiered survey of higher redshift Lyman break galaxies and Lyman alpha emitters will quantify the properties of early systems close to the reionization epoch.
A Novel Approach for Multi-Domain and Multi-Gene Family Identification Provides Insights into Evolutionary Dynamics of Disease Resistance Genes in Core Eudicot Plants
Authors: Hofberger Johannes A. , Zhou Beifei , Tang Haibao , Jones Jonathan D. G. , Schranz M. Eric 
Published: February 2014

ABSTRACTRecent advances in DNA sequencing techniques resulted in more than forty sequenced plant genomes representing a diverse set of taxa of agricultural, energy, medicinal and ecological importance. However, gene family curation is often only inferred from DNA sequence homology and lacks insights into evolutionary processes contributing to gene family dynamics. In a comparative genomics framework, we integrated multiple lines of evidence provided by gene synteny, sequence homology and protein-based Hidden Markov Modelling to extract homologous super-clusters composed of multi-domain resistance (R)-proteins of the NB-LRR type (for NUCLEOTIDE BINDING/LEUCINE-RICH REPEATS), that are involved in plant innate immunity. To assess the diversity of R-proteins within and between species, we screened twelve eudicot plant genomes including six major crops and found a total of 2,363NB-LRRgenes. Our curated R-proteins set shows a 50% average for tandem duplicates and a 22% fraction of gene copies retained from ancient polyploidy events (ohnologs). We provide evidence for strong positive selection acting on all identified genes and show significant differences in molecular evolution rates (Ka/Ks-ratio) among tandem- (mean = 1.59), ohnolog (mean = 1.36) and singleton (mean = 1.22) R-gene duplicates. To foster the process of gene-edited plant breeding, we report species-specific presence/absence of all 140NB-LRRgenes present in the model plantArabidopsisand describe four distinct clusters ofNB-LRR“gatekeeper” loci sharing syntelogs across all analyzed genomes. In summary, we designed and implemented an easy-to-follow computational framework for super-gene family identification, and provide the most curated set ofNB-LRRgenes whose genetic versatility among twelve lineages can underpin crop improvement.
A workflow for UPLC-MS non-targeted metabolomic profiling in large human population-based studies
Authors: Ganna Andrea , Fall Tove , Lee Woojoo , Broeckling Corey D. , Kumar Jitender , Hägg Sara , Magnusson Patrik K. E. , Prenni Jessica , Lind Lars , Pawitan Yudi , Ingelsson Erik 
Published: February 2014

ABSTRACTMetabolomic profiling is an emerging technique in life sciences. Human studies using these techniques have been performed in a small number of individuals or have been targeted at a restricted number of metabolites. In this article, we propose a data analysis workflow to perform non-targeted metabolomic profiling in large human population-based studies using ultra performance liquid chromatography-mass spectrometry (UPLC-MS). We describe challenges and propose solutions for quality control, statistical analysis and annotation of metabolic features. Using the data analysis workflow, we detected more than 8,000 metabolic features in serum samples from 2,489 fasting individuals. As an illustrative example, we performed a non-targeted metabolome-wide association analysis of high-sensitive C-reactive protein (hsCRP) and detected 407 metabolic features corresponding to 90 unique metabolites that could be replicated in an external population. Our results reveal unexpected biological associations, such as metabolites identified as monoacylphosphorylcholines (LysoPC) being negatively associated with hsCRP. R code and fragmentation spectra for all metabolites are made publically available. In conclusion, the results presented here illustrate the viability and potential of non-targeted metabolomic profiling in large population-based studies.
Heterogeneous hosts: how variation in host size, behaviour and immunity affects parasite aggregation
Authors: Johnson Pieter T. J. , Hoverman Jason T. 
Published: February 2014

SummaryInfection heterogeneity is one of the most fundamental patterns in disease ecology, yet surprisingly few studies have experimentally explored its underlying drivers. Here, we used large‐scale field assessments to evaluate the degree of parasite aggregation within amphibian host populations followed by a novel experimental approach to assess the potential influence of host size, behaviour and immunity in reproducing such heterogeneity.Among 227 wetlands, 2468 hosts and seven parasite species, infections were consistently aggregated among host individuals within populations of the Pacific chorus frog (Pseudacris regilla). For each parasite species, the relationship between the log‐mean and log‐variance of infection load was strongly linear (R2: 0·91–0·98) with a slope between 1·37 and 1·67, indicative of aggregation relative to the expected Poisson slope of unity.In laboratory trials withP. regillaand the most virulent trematode (Ribeiroia ondatrae), experimental reductions in either host immunity (through corticosterone exposure) or antiparasite behaviours (through anaesthesia exposure) increased parasite infection loads in isolated hosts by 62–102% relative to unmanipulated individuals. In a second experiment designed to test how variation in host immunity, behaviour and body size affected variation in infection load within small groups (dyads), a reduction in immune function or behaviour of one host significantly amplified infection heterogeneity within the group, effectively doubling the variance‐to‐mean ratio. However, immunity affected aggregation only in the absence of behavioural manipulation, and changing the size distribution of hosts did not appreciably affect aggregation.Using Taylor's Power Law to integrate field and laboratory data, we found that only treatments involving behavioural reductions achieved aggregation levels comparable to natural host populations. Thus, despite their short duration, our treatments generated heterogeneity in infection loads similar to natural observations.These results emphasize how, alongside extrinsic variation in parasite exposure risk, individual host attributes generally and behaviour in particular have the potential to influence infection success and parasite aggregation. Continued integration of infection heterogeneity research across space, among host species, and over time has important implications for understanding and managing human and wildlife diseases.
Effects of prey metapopulation structure on the viability of black‐footed ferrets in plague‐impacted landscapes: a metamodelling approach
Authors: Shoemaker Kevin T. , Lacy Robert C. , Verant Michelle L. , Brook Barry W. , Livieri Travis M. , Miller Philip S. , Fordham Damien A. , Resit Akçakaya H. 
Published: February 2014

Summary

Species interactions have been largely ignored in extinction risk assessment. However, the black‐footed ferret Mustela nigripes exemplifies a class of endangered species for which strong species interactions cannot be ignored. This species is an obligate predator of prairie dogs Cynomys spp., and sylvatic plague Yersinia pestis epizootics threaten to undermine recovery efforts by functionally eliminating the prey base. Multispecies ‘metamodelling’ techniques offer new opportunities for exploring population dynamics under strong species interdependencies and disease.

To investigate ferret extinction risk in plague‐affected landscapes, we simultaneously modelled plague epidemiological processes, prairie dog metapopulation dynamics and ferret demographic responses. Ferret population dynamics were investigated at an important release site (Conata Basin in South Dakota) and for 500 artificial prey landscapes spanning a wide range of realistic colony configurations (e.g. total area, # colonies, spatial clustering) and demographic characteristics.

Our simulation models indicate that ferrets are unlikely to persist through episodes of plague at Conata Basin unless they can access prey resources from a wider region or unless management actions can otherwise substantially reduce plague transmission.

We show that large, diffuse prairie dog metapopulations (those with colonies spread over a region >2500 km2) are most likely to support ferret populations in plague‐affected landscapes. Our results also highlight the potential importance of metapopulation connectivity in fuelling plague epizootics and thereby imperilling black‐footed ferret conservation efforts.

We describe a cycle (c. 5‐ to 25‐year period) of plague‐driven population crashes that is an emergent property of our models, and which can destabilize ferret populations.

Synthesis and applications. On the basis of our models, we conclude that few North American prairie dog complexes cover sufficient land area to sustain black‐footed ferret populations through plague‐driven crashes in prey abundance. Consequently, our results underscore the importance of working with many constituents to conserve large prairie dog landscapes in addition to continued development of plague mitigation tools. In addition, the strong relationship between plague‐induced oscillatory prey cycles and predator population persistence highlights the potential conservation benefits of imposing strategic barriers to connectivity in areas over which plague outbreak cycles are strongly synchronous.
Urbanizing Urban Political Ecology: A Critique of Methodological Cityism
Authors: Angelo Hillary , Wachsmuth David 
Published: February 2014

AbstractUrban political ecology (UPE), an offshoot of political ecology that emerged in the late 1990s, has had two major impacts on critical urban studies: it has introduced critical political ecology to urban settings, and it has provided a framework for retheorizing the city as a product of metabolic processes of socionatural transformation. However, there was another goal in early UPE programmatic statements that has largely fallen by the wayside: to mobilize a Lefebvrian theoretical framework to trouble traditional distinctions between urban/rural and society/nature by exploring urbanization as a global process. Instead of following this potentially fruitful path, UPE has become bogged down in ‘methodological cityism’––an overwhelming analytical and empirical focus on the traditional city to the exclusion of other aspects of contemporary urbanization processes. Thus UPE's Lefebvrian promise, of a research program that could work across traditional disciplinary divisions and provide insights into a new era of planetary urbanization, has remained unfulfilled. In this article we trace UPE's history to show how it arrived at its present predicament, and offer some thoughts on a research agenda for a political ecology not of the city but of urbanization.