bluuebunny/crossref_metadata_2025_split huggingface dataset:
V524 Monocerotis: A Marginal Contact Binary with a Cyclic Period Variation
Authors: Jia-Jia He , Jing-Jing Wang , Sheng-Bang Qian 
Published: March 2014

Abstract
We have secured and analyzed three-color light curves of V524 Monocerotis with the 2003 version of the Wilson–Devinney code. We confirmed that V524 Mon is a shallow W-type contact binary system with a mass ratio of $q$$=$ 2.099 and a degree of contact factor of $f$$=$ 7.7%. Based on the new eight times of the light minima and those published by previous investigators, we find that the orbital period of the binary shows a long-term decrease ($dp/dt$$=$$-$1.52 $\times$ 10$^{-10}$), while it undergoes a cyclic oscillation ($T_{3}$$=$ 23.93 yr, $A_{3}$$=$ 0.0082 d). The long-term period decrease can be explained by mass transfer from the primary to the secondary. The cyclic change, explained as the light-travel time effect, reveals the presence of a tertiary companion. The marginal contact configuration and the continuous period decrease both suggest that the system may be a newly formed contact binary.
Discovery of Negative Superhumps during a Superoutburst of 2011 January in ER Ursae Majoris
Authors: Ohshima Tomohito , Kato Taichi , Pavlenko Elena P. , Itoh Hiroshi , de Miguel Enrique , Krajci Thomas , Akazawa Hidehiko , Shiokawa Kazuhiko , Stein William , Baklanov Alex , Samsonov Denis , Antonyuk Oksana , Andreev Maksim V. , Imamura Kazuyoshi , Hambsch Franz-Josef , Maehara Hiroyuki , Ruiz Javier , Nakagawa Shin'ichi , Kasai Kiyoshi , Boitnott Boyd , Virtanen Jani , Miller Ian 
Published: March 2014

Abstract
We report on a discovery of “negative” superhumps during the 2011 January superoutburst of ER UMa. During the superoutburst, which started on 2011 January 16, we detected negative superhumps having a period of 0.062242(9) d, shorter than its orbital period by 2.2%. No evidence of a positive superhump was detected during this observation. This finding indicates that the disk exhibited retrograde precession during this superoutburst, contrary to all other known cases of superoutbursts. The duration of this superoutburst was shorter than those of ordinary superoutbursts, and the interval of its normal outbursts was longer than those of ordinary normal outbursts of ER UMa. We suggest the possibility that such unusual outburst properties are likely to be a result of a disk tilt, which is supposed to be a cause of negative superhumps; the tilted disk could prevent the disk from being filled with materials in the outmost region, which is supposed to be responsible for long-duration superoutbursts in ER UMa-type dwarf novae. This discovery signifies the importance of the classical prograde precession in sustaining long-duration superoutbursts. Furthermore, the presence of pronounced negative superhumps in this system with a high mass-transfer rate supports the hypothesis that hydrodynamical lift is the cause of the disk tilt.
Discovery of Metastable Helium Absorption Lines in V1280 Scorpii
Authors: Naito Hiroyuki , Tajitsu Akito , Arai Akira , Sadakane Kozo 
Published: March 2014

Abstract
We report on the discovery of blue-shifted metastable He I* absorption lines at 3188 Å and 3889 Å with multiple components on high-resolution spectra ($ R$$ \sim$ 60000) of V1280 Scorpii. Similar multiple absorption lines associated with the Na I D doublet as well as Ca II H and K were observed. Na I D doublet absorption lines have been observed since 2009, while the metastable He I* absorption lines were absent in 2009, but were detected in 2011 (four years after the burst). We have found different time variations in the depths and velocities of blue-shifted absorption components among He I*, Na I, and Ca II. The complex time evolutions of these lines can be explained by assuming changes in the density and recombination/ionization rate when the ejecta expands and the photosphere contracts to become hotter. The multiple absorption lines originate in ejected materials consisting of clumpy components, which obscure a significant part of the continuum emitting region. We estimate the total mass of the ejected material to be on the order of $ \sim$ 10$ ^{-4}$$ M_{\odot}$ , using metastable He I*$ \lambda\lambda$ 3188 and 3889 absorption lines.
Lithium, Carbon, and Oxygen Abundances of Hyades F–G Type Stars
Authors: Takeda Yoichi , Honda Satoshi , Ohnishi Takashi , Ohkubo Michiko , Hirata Ryuko , Sadakane Kozo 
Published: March 2014

Abstract
In an attempt to carry out a systematic study on the behavior of the photospheric abundances of Li, C, and O (along with Fe) for Hyades main-sequence stars in the $ T_{\rm eff}$ range of $ \sim$ 5000–7000 K, we conducted an extensive spectrum-synthesis analysis applied to four spectral regions (comprising lines of Fe-group elements, Li I 6708 line, C I 7111–7119 lines, and O I 6156–8 lines), based on the high-dispersion spectra of 68 selected F–G type stars belonging to this cluster. The abundances of C and O turned out to be fairly uniform in a marginally supersolar level, such as like the case of Fe: $ \langle$ [C$ /$ H]$ \rangle$$ =$$ +$ 0.15 ($ \sigma$$ =$ 0.08), $ \langle$ [O$ /$ H]$ \rangle$$ =$$ +$ 0.22 ($ \sigma$$ =$ 0.14), and $ \langle$ [Fe$ /$ H]$ \rangle$$ =$$ +$ 0.11 ($ \sigma$$ =$ 0.08), suggesting that the primordial abundances are almost retained for these elements. Strictly, however, they show a slightly increasing trend with a decrease in $ T_{\rm eff}$ (typically on the order of $ \sim$ 10$ ^{-4}$ dex K$ ^{-1}$ ); while this might be due to an improper choice of atmospheric parameters, we found it difficult to give a quantitatively reasonable explanation. Regarding Li, we confirmed the well-known $ T_{\rm eff}$-dependent trend in the Li abundance reported so far (a conspicuous Li-trough at 6300 K $ ≲$$ T_{\rm eff}$$ ≲$ 6700 K and a progressive decrease toward a lower $ T_{\rm eff}$ at $ T_{\rm eff}$$ ≲$ 6000 K), which means that the surface Li of Hyades stars is essentially controlled only by $ T_{\rm eff}$ ; other parameters, such as the rotational velocity, are almost irrelevant.
Suzaku Observation of Strong Solar-Wind Charge-Exchange Emission from the Terrestrial Exosphere during a Geomagnetic Storm
Authors: Ishikawa Kumi , Ezoe Yuichiro , Miyoshi Yoshizumi , Terada Naoki , Mitsuda Kazuhisa , Ohashi Takaya 
Published: March 2014

Abstract
We present an analysis of X-ray data exhibiting strong solar-wind charge-exchange emission obtained with the Suzaku satellite during a geomagnetic storm that occurred on 2005 August 31. A temporal variation of diffuse soft X-ray emission, correlating with the solar-wind proton flux, was found. The diffuse emission consisted of exospheric solar-wind charge exchange (geocoronal SWCX). We extracted the variable component of the spectrum, which is dominated by a sum of C V, C VI, N VI, N VII, O VII, and O VIII emission lines, predicted by the theoretical SWCX model. An analysis of any time correlation between the solar wind and the O VII line flux was conducted using the solar-wind data taken with the ACE and WIND satellites. We found that the observed SWCX intensity was 4–10 times higher than that calculated using a model of exospheric hydrogen density, and the O$ ^{7+}$ flux observed with ACE at the L1 point. This suggests that the exospheric hydrogen density can be higher than that predicted by the hydrogen model, and/or that additional O$ ^{7+}$ ions to the measured ACE fluxes could exist in the magnetosphere. Comparing this observation to past incidences of SWCX emission, as recorded by Suzaku, it was found that the SWCX intensity in this observation was strong, in spite of the fact that the line-of-sight direction did not traverse the sub-solar magnetosheath nor the magnetospheric cusps, where higher SWCX emission would be expected.
Rosette Modes of Oscillations of Rotating Stars Caused by Close Degeneracies. I. Axisymmetric Modes
Authors: Takata Masao , Saio Hideyuki 
Published: March 2014

Abstract
We present an analysis of unique axisymmetric eigenmodes of oscillations in rigidly rotating stars, which have been recently discovered numerically in the frequency region of low-order gravity modes of the polytropic model with index 3, and named as rosette modes after their structure of the eigenfunctions. We show that the appearance of rosette modes in the presence of slow rotation is caused by a close degeneracy in the frequency among several eigenmodes in the non-rotating case. Regarding the effect of the Coriolis force on stellar oscillations as a small perturbation, and applying quasi-degenerate perturbation theory, we can successfully reproduce the structure of rosette modes as a linear combination of several unperturbed eigenmodes, which have almost the same frequency and successive spherical degrees of the same parity. We confirm that the eigenfrequencies and the structure of the eigenfunctions that are determined by the perturbative technique are consistent with the results of more direct numerical computations, which are based on the decomposition of the eigenfunctions into a series of spherical harmonics. We discuss the characteristics of rosette modes in detail.
The Relationship between the Power-Law Indices of the Temporal Properties on Energy and the Spectral Lag and Photon Flux of Gamma-Ray Burst Pulses
Authors: Peng Zhao-Yang , Zhao Xiao-Hong , Yin Yue , Bao Yu-Ying , Ma Li 
Published: March 2014

Abstract
Previous studies have shown that the dependence of the pulse temporal properties (pulse width, pulse rise width, pulse decay width, and pulse peak time) on energy is a power-law function. In this work we demonstrate that the power-law indices of the pulse width, pulse rise width, pulse decay width, and pulse peak time on energy are correlated with the spectral lag and the relative spectral lag, $ \bigtriangleup t_{31}/w_{3}$ (where $ \bigtriangleup t_{31}$ and $ w_{3}$ are the spectral lag between BATSE channels 1 and 3 and the pulse width of BATSE channel 3, respectively), using a sample including 102 well-separated long-duration gamma-ray burst pulses. In addition, the correlations of the power-law indices with the relative spectral lags are much more tighter than those with the spectral lags. We further find that the power-law indices are also correlated with the pulse photon flux. The possible origins of these correlations are also discussed. We argue that the kinematic effect can explain the correlated properties.
Visible Spectroscopic Observations of a Near-Earth Object, 2012 DA14
Authors: Urakawa Seitaro , Fujii Mitsugu , Hanayama Hidekazu , Takahashi Jun , Terai Tsuyoshi , Ohshima Osamu 
Published: March 2014

Abstract
We present visible spectroscopic observations of a near-earth object (NEO), 2012 DA$_{14}$. The asteroid 2012 DA$_{14}$ came close to the Earth’s surface on 2013 February 15 at a distance of 27700 km. Its estimated diameter is $\sim$ 45 m. The physical properties of such a small asteroid have not yet been well determined. The close encounter was a good opportunity to conduct a variety of observations. The purpose of this paper is to deduce the taxonomy of 2012 DA$_{14}$ based on visible spectroscopic observations using the 0.4 m F/10 telescope at the Fujii Kurosaki Observatory. We conclude that the taxonomy of 2012 DA$_{14}$ is L-type in the visible wavelength region. In addition, we refer to the availability of a small, accessible telescope for NEOs smaller than 100 m.
Microwave Signature of Relativistic Positrons in Solar Flares
Authors: Fleishman Gregory D. , Altyntsev Alexander T. , Meshalkina Nataliia S. 
Published: March 2014

Abstract
Relativistic antiparticles can be created in high-energy nuclear interactions; thus, the detection of antiparticles in an astrophysical source can tell us something remarkable about the underlying high-energy processes and nuclear interactions. However, once created, the antiparticles remain a minor fraction of their conjugant normal particles, so the detection of the antiparticles represents a big science challenge. To address this challenge we employ the imaging and polarimetry of microwave radiation produced as the positrons gyrate in the ambient magnetic field. The key property of the radiation used in this method is that the oppositely charged particles, electrons and positrons, produce radiation with opposite helicity, easily distinguishable by currently operating radio facilities. Analysis of available spatially resolved microwave data augmented by independent magnetic field measurements allows us to remotely detect the relativistic positron component in several solar flares.
Microwave and EUV Observations of an Erupting Filament and Associated Flare and Coronal Mass Ejections
Authors: Alissandrakis Costas E. , Kochanov Alexey A. , Patsourakos Spiros , Altyntsev Alexander T. , Lesovoi Sergey V. , Lesovoya Nadya N. 
Published: March 2014

Abstract
A filament eruption was observed with the Siberian Solar Radio Telescope (SSRT) on 2012 June 23, starting at around 06:40 UT, beyond the west limb. The filament could be followed in SSRT images to heights above 1 R⊙, and coincided with the core of the CME, seen in LASCO C2 images. We briefly discuss the dynamics of the eruption: the top of the filament showed a smooth acceleration up to an apparent velocity of $\sim 1100 \textrm {km} \enspace \textrm s^{-1}$. Images behind the limb from STEREO-A show a two-ribbon flare and the interaction of the main filament, located along the primary neutral line, with an arch-like structure, oriented in the perpendicular direction. The interaction was accompanied by strong emission and twisting motions. The microwave images show a low-temperature component, a high-temperature component associated with the interaction of the two filaments and another high-temperature component apparently associated with the top of flare loops. We computed the differential emission measure from the high-temperature AIA bands and from this the expected microwave brightness temperature; for emission associated with the top of the flare loops, the computed brightness was 35% lower than the observed value.
Standards and innovation in manufacturing and services: the case of ISO 9000
Authors: Mangiarotti Giovanni , A.F. Riillo Cesare 
Published: March 2014

Purpose– The research empirically investigates the firm-level impact of ISO 9000 certification on innovation propensity. The study aims to distinguish between manufacturing and service sectors and adopts different innovation definitions aimed at capturing the peculiarities of innovation in services and small firms.Design/methodology/approach– Relying chiefly on Community Innovation Survey data for Luxembourg, the impact of certification on innovation probability is assessed using a logit model that controls for relevant firms characteristics and market features.Findings– The innovation potential of services and small firms is understated when adopting innovation definitions restricted to technological aspects and more formalised innovation activities. ISO 9000 certification may promote innovation when adopting definitions that captures sectoral innovation specificities. In particular, certification increases innovation propensity in manufacturing when the focus is on technological innovation and formalised innovation expenditures. On the contrary, when non-technological aspects are included and allowance is made for wider innovation activities, the impact of certification on services tends to emerge. However, sharper statistical evidence for manufacturing indicates a more important role of certification for innovation success in this sector.Research limitations/implications– Case-study research could supplement the findings concerning the relative effectiveness of certification in services and manufacturing. The investigation would also benefit from extensions in the econometric analysis to address comparisons across samples and potential causality issues.Practical implications– Findings are interesting to practitioners and registrars in order to identify the specific characteristics of firms for which certification provides higher innovative potential.Originality/value– The study highlights the relevance of sectoral specificities and innovation definitions for the debate about the effect of ISO 9000 certification on innovation.
Complementary plant nutrient‐acquisition strategies promote growth of neighbour species
Authors: Teste Francois P. , Veneklaas Erik J. , Dixon Kingsley W. , Lambers Hans 
Published: March 2014

Summary

Greater understanding of positive interspecific interactions in nutrient‐poor soils is a priority, particularly in phosphorus (P)‐limited ecosystems where plants with contrasting nutrient‐acquiring strategies co‐occur. It is also relevant to agro‐ecosystems, since global P stocks are being depleted. In this study, we assess positive interactions between sympatric plants with contrasting nutrient‐acquiring strategies from highly P‐impoverished soils from the biodiversity hotspot of south‐western Australia.

Four plant species (Banksia menziesii, Eucalyptus marginata, Verticordia nitens and Melaleuca preissiana) that are non‐mycorrhizal (cluster‐rooted), ectomycorrhizal (EM), arbuscular (AM) or dual AM/EM, respectively, were grown together in a specially designed ‘common garden’ microcosm with nutrient‐poor or fertilized soil, with or without root intermingling and fungal hyphae contact. We measured growth, mycorrhizal colonization, root intermingling and nutrient uptake to determine positive or negative growth patterns amongst the various plant assemblies.

Growth of the AM/EM host was best when interacting with both the EM host and a non‐mycorrhizal nutrient‐mining plant with cluster roots (Banksia) in microcosms where root intermingling was not possible. Growth promotion was only seen in pots with nutrient‐poor soils, where the better growth of Melaleuca coincided with higher shoot P, manganese, calcium, iron and boron content, whereas an increase in soil nutrient status through fertilizer addition resulted in a decrease in nutrient‐sharing between co‐occurring species. Furthermore, the dual AM/EM Melaleuca exhibited enhanced EM colonization and favoured EM over AM fungi when grown beside Eucalyptus and Banksia. We surmise that mycorrhizal networks were instrumental in the variation in both mycorrhizal type and colonization levels.

We conclude that complementarity of plant nutrient‐acquisition strategies can promote growth of neighbour species. The results show a synergistic effect between EM hyphal scavenging and mobilization of limiting nutrients by cluster roots. The positive and negative interactions enable coexistence to go far beyond the traditional view that plants interact mainly through resource depletion. This study improves our understanding of how root interactions could shape plant communities and promote species diversity and packing in nutrient‐impoverished habitats.
An Experimental Study of Vertebrate Scavenging Behavior in a Northwest European Woodland Context
Authors: Young Alexandria , Stillman Richard , Smith Martin J. , Korstjens Amanda H. 
Published: March 2014

AbstractVertebrate scavengers can modify surface deposited human remains which can hinder forensic investigations. The effects of such scavenging vary between species and regions. Published research into the effects of the scavenging of human remains is dominated by work from North America with few studies covering Northwestern Europe. Forensic scientists, investigators, and police search officers in Northwestern Europe are often left questioning on a basic level as to which scavengers are active and how they might affect human remains. This paper presents the results of a field study utilizing deer (Cervus nippon; Capreolus capreolus) as surface deposits observed by motion detection cameras in a British woodland. The most common avian and rodent scavenger species recorded included the buzzard (Buteo buteo), carrion crow (Corvus corone), wood mouse (Apodemus sylvaticus), and gray squirrel (Sciurus carolinensis). The scavenging behaviors observed were affected by seasonality, rates of decomposition, and insect activity. Scavenging by buzzards, unlike carrion crows, was most frequent during fall to winter and prior to insect activity. Overall, avian scavengers modified and scavenged soft tissue. Rodents scavenged both fresh and skeletonized remains with gray squirrels only scavenging skeletal remains. Wood mice were most active in winter and scavenged both soft tissue and bone.
Postfeeding Larval Dispersal Behavior of Late Season Blow Flies (Calliphoridae) in Southern Ontario, Canada
Authors: Turpin Chantal , Kyle Christopher , Beresford David V. 
Published: March 2014

AbstractPostfeeding dispersal involves migration of larvae away from their food source in order to pupate. Puparia are difficult to find, yet are important for estimating PMI, and missing puparia during collection can result in inaccurate estimations. This study investigates the late season maggot dispersal patterns for blow flies at coyote carcasses in two habitats with an aim to improving puparia collection procedures. Puparia samples collected from various dispersal distances and directions tested the spatial distribution patterns of the various species using the variance/mean ratio (VMR). Lucilia illustris was the most common species to emerge, with a preferred minimum dispersal distance of more than 50.8 cm and an overall VMR value of 14.91, indicating this species had a clumped distribution pattern. These findings highlight that current collection procedures that use random sampling from under carcasses do not adequately account for the spatial distribution of larvae.
Emotional Reactions of Mothers who have Babies who are Diagnosed with Down Syndrome
Authors: Canbulat Nejla , Demirgöz BAL Meltem , Çoplu Mehtap 
Published: March 2014

PurposeThe aim of this study was to explore a deeper insight into experiences of Turkish mothers living with/diagnosed with Down syndrome (DS) baby.MethodsIndividual and audiotaped interviews were carried out with 11 women after amniocentesis in Karaman city of Turkey between August 2012 and February 2013. Transcribed semistructured interviews were qualitatively and analyzed using a thematic analysis approach to code and categorize emerging themes.ResultsThree principal themes emerged from the study: mothers' emotional reaction after diagnosed DS, mother and healthcare professional interactions, and mother's coping with diagnosed DS.ConclusionsUnderstanding the experiences of women living with/diagnosed with DS baby enables nurses to devise appropriate strategies to provide better support at every stage and thus helping them to cope with daily life.AmaçBu çalışmanın amacı gebeliğinde Down sendromu tanısı konmuş kadınların derin bir bakışla deneyimlerini saptamaktır.YöntemÇalışma Karaman'da Ağustos 2012 ve Şubat 2013 tarihleri arasında yapılmıştır. Yarı yapılandırılmış görüşme formu ile kişiye özel ses kayıtları alınarak yapılan çalışmada tematik analiz kullanılarak veriler kodlanmış ve kategorize edilmiştir.BulgularÇalışma sonunda sptanan temalar: tanı sonrası kadınların duygusal durumları, anne‐ sağlık personeli ilişkisi, tanı sonrası başetme yollarıdır.SonuçlarKadınların hislerini anlamak, bu sürecin her aşamasında hemşirelerin daha iyi destek vermek için uygun stratejileri geliştirmelerini sağlayarak, onların günlük yaşamlarını kolaylaştırılabilir.