bluuebunny/crossref_metadata_2025_split huggingface dataset:
Concentric Antenna Enclosures — A New Defended Enclosure Type in West Wales
Authors: James Terrence 
Published: February 2014

Air photography in the drought of 1984 and in the dry summer of 1989 has produced cropmark evidence in Dyfed for a number of defended enclosures whose morphology suggests a new site type that may be commonplace throughout the region.The county of Dyfed has good surviving earthworks of defended enclosures and small hillforts, and hitherto most discussion on settlement patterns has been confined to upstanding sites. Air surveys since 1978, especially in dry summers, have begun to produce evidence for an inadequacy in our understanding of prehistoric and native Romano-British settlement patterns with the discovery of many new defended enclosures surviving only as cropmarks. Building on the work of Professor St Joseph, numerous straight-sided defended cropmark enclosures have been revealed, although the probably mistaken assumption that some of these are of Roman date has tended to exclude them from consideration of prehistoric settlement patterns. The straight-sided cropmark noted by the author in 1984 underlying the surviving earthworks of the later prehistoric Woodbarn Rath (SN 01681703) has corroborative excavation evidence (Vyner 1986) that this cropmark at least is of earlier prehistoric date.
Before Babel A Review Article
Authors: Yoffee Norman 
Published: February 2014

Editorial summary. This paper began as a review of Renfrew, Archaeology and Language. The Puzzle of Indo-European Origins (1987). It was expanded with a further review, of Mallory, In Search of the Indo-Europeans (1989). It has ended by considering not only the books in question, but also wider issues of the relationship between archaeological and linguistic evidence.The hypothesis of Renfrew for an early dispersal of Indo-European speakers from Anatolia with the spread of farming from the 7th millennium bc is contrasted with the view of Mallory that Indo-European speakers emerged from a diverse background in a broad homeland between the Pontic and Caspian Seas in the period 4500–2500 bc. One major difficulty, among many others, for Renfrew's view is that there is no historical evidence for Indo-Europeans in western Asia until the early 2nd millennium bc; the Indo-European-speaking Hittites appear to have been intrusive into Anatolia only slightly before this time and to have made use of the non-Indo-European language of the indigenous Hatti; and in Iran, Indo-European speakers may not have appeared until the end of the 2nd millennium bc.Both Renfrew and Mallory are seen to seek congruence between the archaeological and linguistic records. The opposite view is argued, that historical, linguistic and archaeological evidence each represent different kinds of human behaviour. The metaphor is employed of an incomplete jigsaw puzzle, three-dimensional and with past, present and future, and possessing both picture and text; picture and text each require separate specialists in their reconstruction. The independence and importance of archaeological evidence is reaffirmed.
British Rapiers with Trapezoidal Butt found in Belgium.
Authors: Warmenbol Eugène 
Published: February 2014

Our knowledge of the Belgian Bronze Age is still very partial. Most of the bronze objects of this period — and I am not the only one to say they are important — remain unpublished. The reason for this is to be found in the fact that a great many bronzes have been, or still are, part of private collections. Objects fundamental to our understanding of Bronze Age economics have remained inaccessible for years; moreover, some of these, probably in consequence of this regrettable situation, have been stigmatised by this or that scholar's doubts about their authenticity. It is true that they have been traded by not always very scrupulous dealers.Many scholars have been discouraged by the doubtful quality of part of the material, but too many scholars have therefore lost interest in its totality. A few important hoards, though in public collections, have thus been neglected, and remained unpublished for more than a century (Warmenbol forthcoming a and b). The largest collections, those of Edouard Bernays (Antwerp), George Hasse (Antwerp), J. Moens (Ghent) and J. Maertens de Noordhout (Ghent), were all greatly expanded through the acquisition of objects found during the extensive dredging carried out in the 1910s and 1920s, mainly in the Schelde, but also in other rivers. Great quantities of bronzes were found at places such as Melle, Wetteren, Wichelen and Schoonaarde. All these objects got on the market, and assuredly some dealers improved their stocks by enriching them with objects certainly found elsewhere.
The Prehistoric Society, Prehistory and Society
Authors: Chapman Robert 
Published: February 2014

Towards the beginning of her novel Excellent Women Barbara
Pym recounts a telephone conversation of more than passing relevance to our
meeting today.I dialled the number fearfully and heard it ring. ‘Hello, hello, who is
that?’ a querulous elderly woman's voice answered. I was completely taken
aback, but before I could speak the voice went on, ‘If it's Miss Jessop I
can only hope you are ringing up to apologize’. I stammered out an
explanation. I was not Miss Jessop. Was Mr Everard Bone there? ‘My son is at
a meeting of the Prehistoric Society’, said the voice. ‘Oh, I see. I'm so
sorry to have bothered you’, I said. ‘People are always bothering me — I
never wanted to have the telephone put in at all’.After a further apology I hung up the receiver shaken and mystified but at
the same time relieved. Everard Bone was at a meeting of the Prehistoric
Society. It sounded like a joke. (1952, 29–30)Mr President, Ladies and Gentlemen, if this is a typical reaction to the
Prehistoric Society, then on 23 February we become a fifty-year-old joke! If
we allow for the history of the Prehistoric Society of East Anglia, then we
reach well and truly back into the days of the Music Hall joke.
Mortality and Morbidity Among Rwandan Refugees Repatriated from Zaire, November, 1996
Authors: Banatvala Nicholas , Roger Alison J. , Denny Ailsa , Howarth John P. 
Published: February 2014

AbstractIntroduction:Following renewed ethnic violence at the end of September 1996, conflict between Tutsi rebels and the Zairian army spread to North Kivu, Zaire where approximately 700,000 Rwandan Hutu refugees resided following the 1994 genocide. After a major rebel offensive against the camps' militia groups on 15 November, a massive movement of refugees towards Rwanda through Goma town, the capital of North Kivu, began. Massive population movements such as this are likely to be associated with substantial mortality and morbidity.Objective:To study patterns of mortality, morbidity, and health care associated with the Rwandan refugee population repatriation during November 1996.Methods:This study observed the functioning of the health-care facilities in the Gisenyi District in Rwanda and the Goma District in Zaire, and surveyed mortality and morbidity among Rwandan refugees returning from Zaire to Rwanda. Patterns of mortality, morbidity, and health care were measured mainly by mortality and health centre consultation rates.Results:Between 15 and 21 November 1996, 553,000 refugees returned to Rwanda and 4,530 (8.2/1,000 refugees) consultations took place at the border dispensary (watery diarrhea, 63%; bloody diarrhea, 1%). There were 129 (0.2/1,000) surgical admissions (72% soft tissue trauma) to the Gisenyi hospital in the subsequent two weeks. The average number of consultations from the 13 health centres during the same period was 500/day. Overall, the recorded death rate was 0.5/10,000 (all associated with diarrhea). A total of 3,586 bodies were identified in the refugee camps and surrounding areas of Goma, almost all the result of trauma. Many had died in the weeks before the exodus. Health centres were overwhelmed and many of the deficiencies in provision of health care identified in 1994 again were evident.Results:Non-violent death rates were low, a reflection of the population's health status prior to migration and immunity acquired from the 1994 cholera out-break. Health facilities were over stretched, principally because of depleted numbers of local, health-care workers associated with the 1994 genocide. Health-care facilities running parallel to the existing health-care system functioned most effectively.
Pulsating variables from the OGLE and Araucaria projects
Authors: Pietrzyński G. 
Published: February 2014

AbstractWe present some results of long-term studies of pulsating stars conducted in the course of the OGLE and Araucaria projects. In particular, very scarce eclipsing binaries containing pulsating stars are discussed. Such systems provide a unique opportunity to improve calibration of the cosmic distance scale and to better calibrate stellar evolutionary models.
Theoretical properties of regularities in the oscillation spectra of A-F main-sequence stars
Authors: Suárez Juan Carlos , Hernández Antonio García , Moya Andrés , Rodrigo Carlos , Solano Enrique , Garrido Rafael , Rodón José R. 
Published: February 2014

AbstractWe study the theoretical properties of the regular spacings found in the oscillation spectra of δ Scuti stars. A linear relation between the large separation and the mean density is predicted to be found in the low-frequency domain (i.e. radial orders spanning from 1 to 8, approximately) of the main-sequence δ Scuti stars' oscillation spectrum. This implies an independent direct measure of the average density of δ Scuti stars, analogous to that of the Sun, and places tight constraints on the mode identification and hence on the stellar internal structure and dynamics, and allows a determination the radii of planets orbiting around δ Scuti stars with unprecedented precision. This opens the way for studying the evolution of regular patterns in pulsating stars, and its relation to stellar structure and evolution.
Spectroscopy of γ Doradus stars
Authors: Brunsden E. , Pollard K. R. , Cottrell P. L. , Wright D. J. , De Cat P. , Kilmartin P. M. 
Published: February 2014

AbstractThe musician programme at the University of Canterbury has been successfully identifying pulsation modes in many γ Doradus stars using hundreds of ground-based spectroscopic observations. This paper describes some of the successful mode identifications and emerging patterns of the programme. The hybrid γ Doradus/δ Scuti star HD 49434 remains an enigma, despite the analysis of more than 1700 multi-site high-resolution spectra. A new result for this star is apparently distinct line-profile variations for the γ Doradus and δ Scuti frequencies.
Constraints on pre-main-sequence evolution from stellar pulsations
Authors: Casey M. P. , Zwintz K. , Guenther D. B. 
Published: February 2014

AbstractPulsating pre-main-sequence (PMS) stars afford the earliest opportunity in the lifetime of a star to which the concepts of asteroseismology can be applied. PMS stars should be structurally simpler than their evolved counterparts, thus (hopefully!) making any asteroseismic analysis relatively easier. Unfortunately, this isn't necessarily the case. The majority of these stars (around 80) are δ Scuti pulsators, with a couple of γ Doradus, γ Doradus – δ Scuti hybrids, and slowly pulsating B stars thrown into the mix. The majority of these stars have only been discovered within the last ten years, with the community still uncovering the richness of phenomena associated with these stars, many of which defy traditional asteroseismic analysis.A systematic asteroseismic analysis of all of the δ Scuti PMS stars was performed in order to get a better handle on the properties of these stars as a group. Some strange results have been found, including one star pulsating up to the theoretical acoustic cut-off frequency of the star, and a number of stars in which the most basic asteroseismic analysis suggests problems with the stars' positions in the Hertzsprung-Russell diagram. From this we get an idea of the\break constraints — or lack thereof — that these results can put on PMS stellar evolution.
The pulsation-rotation interaction: Greatest hits and the B-side
Authors: Townsend Rich 
Published: February 2014

AbstractIt has long been known that rotation can have an appreciable impact on stellar pulsation — by modifying the usual p and g modes found in the non-rotating case, and by introducing new classes of modes. However, it's only relatively recently that advances in numerical simulations and complementary theoretical treatments have enabled us to model these phenomena in any great detail. In this talk I'll review highlights in this area (the ‘Greatest Hits’), before considering the flip side (or the ‘B-side’, for those of us old enough to remember vinyl records) of the pulsation-rotation interaction: how pulsation can itself influence internal rotation profiles.
Pulsation of magnetic stars
Authors: Saio Hideyuki 
Published: February 2014

AbstractSome Ap stars with strong magnetic fields pulsate in high-order p modes; they are called roAp (rapidly oscillating Ap) stars. The p-mode frequencies are modified by the magnetic fields. Although the large frequency separation is hardly affected, small separations are modified considerably. The magnetic field also affects the latitudinal amplitude distribution on the surface. We discuss the properties of axisymmetric p-mode oscillations in roAp stars.
Testing microphysics data
Authors: Walczak Przemysław , Daszyńska-Daszkiewicz Jadwiga 
Published: February 2014

AbstractHigh precision asteroseismic data provide a unique opportunity to test input microphysics such as stellar opacities, chemical composition or equation of state. These tests are possible because pulsational frequencies as well as amplitudes and phases of the light variations are very sensitive to the internal structure of a star. We can therefore compute pulsation models and compare them with observations. The agreement or differences should tell us whether some models are adequate or not, and which input data need to be improved.
Iron-group opacities in the envelopes of massive stars
Authors: Le Pennec Maëlle , Turck-Chièze Sylvaine 
Published: February 2014

Abstractβ Cephei and SPB stars are pulsating stars for which the excitation of modes by the κ mechanism, due to the iron-group opacity peak, seems puzzling. We have first investigated the origins of the differences noticed between OP and OPAL iron and nickel opacity calculations (up to a factor 2), a fact which complicates the interpretation. To accomplish this task, new well-qualified calculations (SCO-RCG, HULLAC and ATOMIC) have been performed and compared to values of these tables, and most of the differences are now well understood. Next, we have exploited a dedicated experiment on chromium, iron and nickel, conducted at the LULI 2000 facilities. We found that, in the case of iron, detailed calculations (OP, ATOMIC and HULLAC) show good agreement, contrary to all of the non-detailed calculations. However, in the case of nickel, OP calculations show large discrepancies with the experiments but also with other codes. Thus, the opacity tables need to be revised in the thermodynamical conditions corresponding to the peak of the iron group. Consequently we study the evolution of this iron peak with changes in stellar mass, age, and metallicity to determine the relevant region where these tables should be revised.
Pulsations of blue supergiants before and after helium core ignition
Authors: Ostrowski Jakub , Daszyńska-Daszkiewicz Jadwiga 
Published: February 2014

AbstractWe present results of pulsation analyses of B-type supergiant models with masses of 14 – 18 M⊙, considering evolutionary stages before and after helium core ignition. Using a non-adiabatic pulsation code, we compute instability domains for low-degree modes. For selected models in these two evolutionary phases, we compare properties of pulsation modes. Significant differences are found in oscillation spectra and the kinetic energy density of pulsation modes.
The evolution of the internal rotation of solar-type stars
Authors: Di Mauro Maria Pia , Ventura Rita , Cardini Daniela , Christensen-Dalsgaard Jørgen , Dziembowski Wojciech A. , Paternò Lucio 
Published: February 2014

AbstractWe discuss the potential of asteroseismic inversion to study the internal dynamics of solar-type stars and to reconstruct the evolution of the internal rotation from the main sequence to the red-giant phase. In particular, we consider the use of gravity and mixed modes and the application of different inversion methods.
Spectropolarimetric study of the classical Cepheid η Aql: pulsation and magnetic field
Authors: Butkovskaya V. , Plachinda S. , Baklanova D. , Butkovskyi V. 
Published: February 2014

AbstractWe report the results of spectropolarimetric study of the classical Cepheid η Aql. We found that the longitudinal magnetic field of η Aql sinusoidally varies with the radial pulsation period, while the amplitude B, mean field B0, and phases of maximum and minimum field change from year to year. We hypothesize that possible reasons of those variations are stellar axial rotation or dynamo mechanisms.
Stellar variability in the VVV survey: overview and first results
Authors: Catelan M. , Minniti D. , Lucas P. W. , Dékány I. , Saito R. K. , Angeloni R. , Alonso-García J. , Hempel M. , Hełminiak K. , Jordán A. , Ramos R. Contreras , Navarrete C. , Beamín J. C. , Rojas A. F. , Gran F. , Lopes C. E. Ferreira , Peña C. Contreras , Kerins E. , Huckvale L. , Rejkuba M. , Cohen R. , Mauro F. , Borissova J. , Amigo P. , Eyheramendy S. , Pichara K. , Espinoza N. , Navarro C. , Hajdu G. , Espinoza D. N. Calderón , Muro G. A. , Andrews H. , Motta V. , Kurtev R. , Emerson J. P. , Bidin C. Moni , Chené A.-N. 
Published: February 2014

AbstractThe Vista Variables in the Vía Láctea (VVV) ESO Public Survey is an ongoing time-series, near-infrared (IR) survey of the Galactic bulge and an adjacent portion of the inner disk, covering 562 square degrees of the sky, using ESO's VISTA telescope. The survey has provided superb multi-color photometry in 5 broadband filters (Z, Y, J, H, and Ks), leading to the best map of the inner Milky Way ever obtained, particularly in the near-IR. The main part of the survey, which is focused on the variability in the Ks-band, is currently underway, with bulge fields observed between 34 and 73 times, and disk fields between 34 and 36 times. When the survey is complete, bulge (disk) fields will have been observed up to a total of 100 (60) times, providing unprecedented depth and time coverage in the near-IR. Here we provide a first overview of stellar variability in the VVV data.
Characterizing the variability of Melotte 111 AV 1224: a new variable star in the Coma Berenices open cluster
Authors: Fox-Machado L. , Michel R. , Alvarez M. , Peña J. H. 
Published: February 2014

AbstractA search for new pulsating stars in the Coma Berenices open cluster was carried out. As a result of this search, the cluster member Melotte 111 AV 1224 presented clear indications of photometric variability. In order to determine its physical parameters, Strömgren standard indices and low-resolution spectra were acquired. In this work, we present the preliminary results of these observations.
Asteroseismology from Dome A, Antarctica
Authors: Fu J. N. , Zong W. K. , Yang Y. , Moore A. , Ashley M. C. B. , Cui X. Q. , Feng L. L. , Gong X. F. , Lawrence J. S. , Luong-Van D. , Liu Q. , Pennypacker C. R. , Shang Z. H. , Storey J. W. V. , Wang L. Z. , Wang L. F. , Yang H. G. , Yuan X. Y. , York D. G. , Zhou X. , Zhu Z. H. 
Published: February 2014

AbstractGattini and CSTAR have been installed at Dome A, Antarctica, which provide time-series photometric data for a large number of pulsating variable stars. We present the study for several variable stars with the data collected with the two facilities in 2009 to demonstrate the scientific potential of observations from Dome A for asteroseismology.
Interaction of multidimensional convection and radial pulsation
Authors: Geroux Chris M. , Deupree Robert G. 
Published: February 2014

AbstractWe have previously calculated a number of 2D hydrodynamic simulations of convection and pulsation to full amplitude. These revealed a significantly better fit to the observed light curves near the red edge of the instability strip in the globular cluster M 3 than did previous 1D mixing length models. Here we compare those 2D results with our new 3D hydrodynamic simulations calculated with the same code. As expected, the horizontal spatial behaviour of convection in 2D and 3D is quite different, but the time dependence of the convective flux on pulsation phase is quite similar. The difference in pulsation growth rate is only about 0.1% per period, with the 3D models having more damping at each of the five effective temperatures considered. Full amplitude pulsation light curves in 2D and 3D are compared.
Ground-based photometry for 42 Kepler-field RR Lyrae stars
Authors: Jeon Young-Beom , Ngeow Chow-Choong , Nemec James M. 
Published: February 2014

AbstractFollow-up (U)BVRI photometric observations have been carried out for 42 RR Lyrae stars in the Kepler field. The new magnitude and color information will complement the available extensive high-precision Kepler photometry and recent spectroscopic results. The photometric observations were made with the following telescopes: 1-m and 41-cm telescopes of Lulin Observatory (Taiwan), 81-cm telescope of Tenagra Observatory (Arizona, USA), 1-m telescope at the Mt. Lemmon Optical Astronomy Observatory (LOAO, Arizona, USA), 1.8-m and 15-cm telescopes at the Bohyunsan Optical Astronomy Observatory (BOAO, Korea) and 61-cm telescope at the Sobaeksan Optical Astronomy Observatory (SOAO, Korea). The observations span from 2010 to 2013, with ~200 to ~600 data points per light curve. Preliminary results of the Korean observations were presented at the 5th KASC workshop in Hungary. In this work, we analyze all observations. These observations permit the construction of full light curves for these RR Lyrae stars and can be used to derive multi-filter Fourier parameters.
Chromospheric activity of 9 Aurigae
Authors: Kaye Anthony B. , Kristof Cristine , Gray Richard O. 
Published: February 2014

AbstractThe definition of γ Dor stars as a new class of variable stars by Kaye et al. (1999) was based on a number of criteria, including the failure to detect any emission in the Ca II H & K lines in these stars (Kaye & Strassmeier 1998; KS98). Over the last 30 years, efforts continue to look for the blue edge of chromospheric activity. As a part of this effort, we put γ Dor stars to the test to see if magnetic fields play a non-trivial role in their variability.
Wide-field variability survey of the globular cluster NGC 4833
Authors: Kopacki Grzegorz 
Published: February 2014

AbstractWe present preliminary results of the variability survey in the field of the globular cluster NGC 4833. We observed all 34 variable stars known in the cluster. In addition, we have found two new SX Phoenicis stars, one new RR Lyrae star, twelve new eclipsing systems mostly of the W Ursae Majoris type, nine new variable red giants, and ten new field-stars showing irregular variations. Properties of RR Lyrae stars indicate that NGC 4833 is an Oosterhoff's type II globular cluster.