bluuebunny/crossref_metadata_2025_split huggingface dataset:
Physical Properties of the Close-in Tertiary in the Southern Triple-lined System VZ Lib
Authors: Liao W.-P. , Qian S.-B. , Sarotsakulchai T. 
Published: May 2019

Abstract
VZ Lib is a southern triple-lined system. By analyzing all available times of light minima, orbital period changes are revisited in detail. We discovered that the observed–calculated (O − C) curve shows a long-term period decrease at a rate of

, revealing a mass transfer from the more massive component to the less massive one. A cyclic variation covering more than three cycles was discovered, which was analyzed for the light-travel-time effect via the presence of the tertiary companion. The cyclic variation has a short period of 2.96 (±0.04) yr and a small semiamplitude of 0.0039 (±0.0004) days. The mass of the third body was determined to be

M
⊙ and an orbital semimajor axis shorter than

au was obtained. Orbital properties of this close-in companion should provide valuable information on the formation of close binaries and stellar dynamical interaction. New complete

light curves of VZ Lib were obtained and modeled with the Wilson–Devinney code. The light curves show a small but significant O’Connell effect that was not detectable in 1981 and 2007 but in 2004, so we derived a new photometric solution with assuming spot and a third light in the system. It is found that the light-curve subtype changed from A-type to W-type, which was possibly caused by a dark spot on the massive component. Our photometric solutions are in agreement with the spectroscopic results given by previous authors.
Intensity-coupled Polarization in Instruments with a Continuously Rotating Half-wave Plate
Authors: Didier Joy , Miller Amber D. , Araujo Derek , Aubin François , Geach Christopher , Johnson Bradley , Korotkov Andrei , Raach Kate , Westbrook Benjamin , Young Karl , Aboobaker Asad M. , Ade Peter , Baccigalupi Carlo , Bao Chaoyun , Chapman Daniel , Dobbs Matt , Grainger Will , Hanany Shaul , Helson Kyle , Hillbrand Seth , Hubmayr Johannes , Jaffe Andrew , Jones Terry J. , Klein Jeff , Lee Adrian , Limon Michele , MacDermid Kevin , Milligan Michael , Pascale Enzo , Reichborn-Kjennerud Britt , Sagiv Ilan , Tucker Carole , Tucker Gregory S. , Zilic Kyle 
Published: May 2019

Abstract
We discuss a systematic effect associated with measuring polarization with a continuously rotating half-wave plate (HWP). The effect was identified with the data from the E and B Experiment, which was a balloon-borne instrument designed to measure the polarization of the cosmic microwave background (CMB) as well as that from Galactic dust. The data show polarization fractions larger than 10%, while less than 3% were expected from instrumental polarization. We give evidence that the excess polarization is due to detector nonlinearity in the presence of a continuously rotating HWP. The nonlinearity couples intensity signals to polarization. We develop a map-based method to remove the excess polarization. Applying this method to the 150 (250) GHz band data, we find that 81% (92%) of the excess polarization was removed. Characterization and mitigation of this effect are important for future experiments aiming to measure the CMB B-modes with a continuously rotating HWP.
Do Kepler Superflare Stars Really Include Slowly Rotating Sun-like Stars?—Results Using APO 3.5 m Telescope Spectroscopic Observations and Gaia-DR2 Data
Authors: Notsu Yuta , Maehara Hiroyuki , Honda Satoshi , Hawley Suzanne L. , Davenport James R. A. , Namekata Kosuke , Notsu Shota , Ikuta Kai , Nogami Daisaku , Shibata Kazunari 
Published: May 2019

Abstract
We report the latest view of Kepler solar-type (G-type main-sequence) superflare stars, including recent updates with Apache Point Observatory (APO) 3.5 m telescope spectroscopic observations and Gaia-DR2 data. First, we newly conducted APO 3.5 m spectroscopic observations of 18 superflare stars found from Kepler 1-minute time-cadence data. More than half (43 stars) are confirmed to be “single” stars, among 64 superflare stars in total that have been spectroscopically investigated so far in this APO 3.5 m and our previous Subaru/HDS observations. The measurements of v sin i (projected rotational velocity) and chromospheric lines (Ca ii H and K and Ca ii
λ8542) support that the brightness variation of superflare stars is caused by the rotation of a star with large starspots. We then investigated the statistical properties of Kepler solar-type superflare stars by incorporating Gaia-DR2 stellar radius estimates. As a result, the maximum superflare energy continuously decreases as the rotation period P
rot increases. Superflares with energies ≲5 × 1034 erg occur on old, slowly rotating Sun-like stars (P
rot ∼ 25 days) approximately once every 2000–3000 yr, while young, rapidly rotating stars with P
rot ∼ a few days have superflares up to 1036 erg. The maximum starspot area does not depend on the rotation period when the star is young, but as the rotation slows down, it starts to steeply decrease at P
rot ≳ 12 days for Sun-like stars. These two decreasing trends are consistent since the magnetic energy stored around starspots explains the flare energy, but other factors like spot magnetic structure should also be considered.
The Tail of PSR J0002+6216 and the Supernova Remnant CTB 1
Authors: Schinzel F. K. , Kerr M. , Rau U. , Bhatnagar S. , Frail D. A. 
Published: May 2019

Abstract
We have carried out Very Large Array imaging and a Fermi timing analysis of the 115 ms γ-ray and radio pulsar PSR J0002+6216. We found that the pulsar lies at the apex of a narrowly collimated cometary-like 7′ tail of nonthermal radio emission, which we identify as a bow-shock pulsar wind nebula. The tail of the nebula points back toward the geometric center of the supernova remnant CTB 1 (G116.9+0.2) 28′ away, at a position angle θ

μ
= 113°. We measure a proper motion with 2.9σ significance from a Fermi timing analysis giving μ = 115 ± 33 mas yr−1 and θ

μ
= 121° ± 13°, corresponding to a large transverse pulsar velocity of 1100 km s−1 at a distance of 2 kpc. This proper motion is of the right magnitude and direction to support the claim that PSR J0002+6216 was born from the same supernova that produced CTB 1. We explore the implications for pulsar birth periods, asymmetric supernova explosions, and mechanisms for pulsar natal kick velocities.
On the Time–Frequency Downward Drifting of Repeating Fast Radio Bursts
Authors: Wang Weiyang , Zhang Bing , Chen Xuelei , Xu Renxin 
Published: May 2019

Abstract
The newly discovered second repeating fast radio burst (FRB) source, FRB 180814.J0422+73, was reported to exhibit a time–frequency downward drifting pattern, which is also seen in the first repeater FRB 121102. We propose a generic geometrical model to account for the observed downward drifting of sub-pulse frequency, within the framework of coherent curvature radiation by bunches of electron–positron pairs in the magnetosphere of a neutron star (NS). A sudden trigger event excites these coherent bunches of charged particles, which stream outward along open field lines. As the field lines sweep across the line of sight, the bunches seen later travel farther into the less-curved part of the magnetic field lines, thus emitting at lower frequencies. We use this model to explain the time–frequency downward drifting in two FRB generation scenarios, the transient pulsar-like sparking from the inner gap region of a slowly rotating NS, and the externally triggered magnetosphere reconfiguration known as the “cosmic comb.”
Fast Orbital Shrinkage of Black Hole X-Ray Binaries Driven by Circumbinary Disks
Authors: Chen Wen-Cong , Podsiadlowski Philipp 
Published: May 2019

Abstract
Recently, the black hole X-ray binary (BHXB) Nova Muscae 1991 has been reported to be experiencing an extremely rapid orbital decay. So far, three BHXBs have anomalously high orbital-period derivatives, which cannot be interpreted by the standard stellar evolution theory. In this work, we investigate whether the resonant interaction between the binary and a surrounding circumbinary (CB) disk could produce the observed orbital-period derivatives. Analytical calculations indicate that the observed orbital-period derivatives of XTE J1118+480 and A0620-00 can originate from the tidal torque between the binary and a CB disk with a mass of 10−9
M
⊙, which is approximately in agreement with the dust disk mass detected in these two sources. However, Nova Muscae 1991 was probably surrounded by a heavy CB disk with a mass of 10−7
M
⊙. Based on the CB disk model and the anomalous magnetic braking theory, we simulate the evolution of the three BHXBs with intermediate-mass donor stars by using the MESA code. Our simulated results are approximately consistent with the observed donor-star masses, orbital periods, and orbital-period derivatives. However, the calculated effective temperatures of the donor stars are higher than indicated by the observed spectral types of two sources.
Thirty years of ecological research at the Gran Sasso d’Italia LTER site: climate change in action
Authors: Petriccione Bruno , Bricca Alessandro 
Published: May 2019

Since 1986, vegetation monitoring of alpine plant communities has been performed at the Gran Sasso d’Italia LTER site (https://deims.org/c0738b00-854c-418f-8d4f-69b03486e9fd) in the Central Apennines, through phytosociological relevés and abundance and coverage estimation of the vascular flora at fine scale. The monitoring activities for abiotic parameters regard air and soil temperatures, rainfall, snowfall and snow cover persistence.
A comparative analysis of changes in species composition, life forms, life strategies and morpho-functional types allowed recognition of dynamical processes (fluctuation and degeneration) and an increase in stress- and drought-tolerant and ruderal species, probably linked to a general process of climate change.
A trend of variation forced by increasing drought was recorded in high-mountain plant communities, normally within a dynamic fluctuation process. There has been a 50–80% change in species composition with respect to the total number of species observed over the years. Whereas the total number of species has increased in all communities, in high-mountain mesic grassland 20% of sensitive species have completely disappeared. Early signs of a degeneration process were already discernible after seven years: such signs are more evident in snow-dependent communities, with a quantitative increase in more thermophilic and drought-tolerant species and a parallel decrease in more mesic, cryophilic and competitive species. In particular, the following phenomena have been recorded in high-mountain mesic grassland, in agreement with predicted or observed phenomena in other Alpine or Arctic areas: (a) coverage increase (or appearance) of ruderal and stress- and drought-tolerant species; (b) coverage decrease (or disappearance) of cryophilic, mesic and competitive species.
These short-term changes could lead, in the medium- or long-term, to a disgregation process affecting the high elevation plant communities of the Apennines (including the local extinction of most of the cold-adapted species), due to their very low resilience. The phenomena described may be linked to the observed climate change which occurred during the last century (in particular in the last 50 years) in the Apennines, consisting mainly, in the mountains, of a strong reduction in the duration of snow-cover and an increase in mean and minimum annual temperatures.
Le jugement judiciaire aux prises avec de nouvelles «|formes de vérité »: marché, calcul, numérique
Authors: Garapon Antoine 
Published: May 2019

Ces dernières années ont vu se développer de nouvelles menaces sur le jugement judiciaire qui concernent moins ses énoncés ou ses ressorts moraux que sa forme symbolique, fruit d’une association de ritualité et d’idéalité, qui se trouve désormais en concurrence avec de nouvelles formes de vérité : le marché, le calcul du risque et le numérique. Aucune de ces formes de vérité ne s’avère, on le verra, à la hauteur de la tâche de justice faute de réflexivité, de mécanismes assurant la résolution de leurs contradictions et la prévention de leur effondrement. C’est pourquoi l’urgence est de penser leur articulation à une justice instituée et leur rapatriement en appel dans les formes traditionnelles du procès.
Comment écrire ? Essai et expérience à partir d’Adorno
Authors: Gatti Luciano , Berdet Marc 
Published: May 2019

L’article se propose de discuter « L’essai comme forme » de Theodor W. Adorno. Afin d’expliciter le caractère objectif de l’activité intellectuelle investie dans l’essai, il prolonge la confrontation adornienne avec les concepts d’expérience, de critique et d’idéologie. C’est dans ce contexte qu’il reprend aussi le dialogue avec d’autres auteurs comme Montaigne, Hegel, Proust, Lukács et Benjamin, et discute des conditions de l’essayisme au Brésil.
Tourisme et terrorisme. Grand Tour et petites tournées de la terreur
Authors: Joron Philippe 
Published: May 2019

Voyage d’agrément à l’origine, le tourisme suppose pour ses adeptes la pratique d’un Grand Tour, loin des habitudes et des sentiers battus, grâce auquel l’expérience est censée prendre corps sous de nouvelles formes, notamment celle de l’aventure. Le tourisme de masse, rendu possible par la démocratisation des accès, des mobilités et des séjours, par les accords internationaux, par la fluidification des échanges et la mise à disposition de technologies toujours plus sophistiquées et opérationnelles, a entraîné dans son sillage un dispositif d’aventure particulier, tout autant programmé et accessible : le tourisme de la terreur.
Territorialités et sécurité : le tourisme comme laboratoire social. Approche ethno-sociologique des liens sociaux et des identités
Authors: Abdelmalek Ali Aït 
Published: May 2019

Les touristes constituent souvent, aujourd’hui, une « cible privilégiée du terrorisme » et des différentes formes de délinquance sur les plans national et international ; l’optimisation de la sécurisation des territoires au regard du tourisme est dès lors une préoccupation accrue de l’État, des collectivités décentralisées et de leurs groupements, ainsi que des professionnels du secteur. Nous nous proposons d’évoquer l’importance du « dialogue entre hauts fonctionnaires de l’État, élus, personnels des collectivités territoriales, professionnels du tourisme et enseignants-chercheurs de différentes disciplines ». Seront confrontées les recherches et les activités dites de terrain, afin d’apporter des éléments de compréhension à propos de la complexité des phénomènes de violence, et de suggérer des politiques et des stratégies à développer, et ce afin de garantir la sécurité de tous les voyageurs, ici, les touristes, sur le territoire français.
Terrorisme global et protection des touristes étrangers : renforcer le rôle des services consulaires
Authors: Weckel Philippe 
Published: May 2019

Résumé : Lors d’un attentat terroriste en France, l’assistance consulaire doit avoir une place centrale dans la prise en charge des victimes étrangères et être intégrée dans le dispositif de gestion de la crise. La Convention de Vienne de 1963 est la base juridique de l’assistance consulaire. Or aucune précision n’est donnée sur le contenu de celle-ci. Une clarification est nécessaire, pour les situations de crises majeures, dans le respect de la réciprocité. Une place devrait être faite dans ce domaine aux accords décentralisés et à la participation des collectivités territoriales qui contribueraient ainsi, avec les services de l’État, à la dimension internationale du territoire.
Le développement du tourisme au Maroc : entre politique nationale et géopolitique internationale
Authors: Slaoui Benani Dakhama Assmae 
Published: May 2019

La présente réflexion a pour objectif d’analyser les représentations qu’ont les acteurs – voyageurs et populations – du terrorisme et son impact sur l’essor touristique marocain, et, au-delà, sur les projets d’aménagement d’espaces touristiques de grande envergure du fait de stratégies sectorielles engagées depuis plusieurs années. Le Maroc offre un bon exemple de stabilité politique et sociale. C’est un territoire ouvert au tourisme qui a vu, pendant longtemps, sa stratégie politique nationale inclure le tourisme comme secteur prioritaire essentiel à son progrès socio-économique. Cependant, la réussite de son développement reste toujours un « éternel espoir » malgré les nombreux plans de développement mis en place depuis les années 1960. Comment justifier un tel bilan ? Quelles sont les perspectives d’avenir du secteur du tourisme marocain dans un monde perturbé par le terrorisme dit « islamiste » dont l’action prend de l’ampleur dans le temps et dans l’espace ?
De la Poésie-Scientifique & autres écrits
Authors: Ghil René 
Published: May 2019

René Ghil fut autour de 1890 le plus soudainement célèbre, le plus admiré, le plus contesté, le plus violemment haï, puis le plus injustement oublié des auteurs de la génération symboliste : précisément parce qu'il s'avéra l'adversaire le plus irréductible du Symbolisme.

Il rompit très tôt avec Mallarmé sur la question de l'Idéalisme, auquel il opposait une vaste métaphysique de la Matière en évolution vers un « Mieux », inspirée des cosmogonies orientales autant que de la science occidentale contemporaine (Darwin). Sa théorie de l'« Instrumentation verbale », basée sur un sensualisme linguistique inspiré des théories sur le langage de Rousseau et des recherches récentes en acoustique et en phonétique expérimentales (Helmholtz), eut un impact considérable : des futuristes russes et italiens à Breton ou Aragon, voire aux lettristes dissidents Jean-Louis Brau et François Dufrêne, pionniers de la Poésie sonore.

Si les versions successives de son précoce et effervescent Traité du Verbe, devenu En Méthode à l'Œuvre, ont fait l'objet d'innombrables commentaires, certes point toujours amènes, ses traités plus tardifs, consacrés à la « Poésie scientifique », ont fait beaucoup moins de bruit et sont restés largement ignorés ; ils représentent pourtant les états les plus aboutis, et les plus personnels, d'une pensée aussi intransigeante que singulière, parvenue à une ferme maturité. Pour toutes ces raisons, ils méritent aujourd'hui d'être lus, et, en dehors des clichés tenaces, de contribuer aux débats actuels sur la poésie, dans ses rapports avec la connaissance et la chose publique…
Effect of Different Cooking Methods on the Antioxidant properties of Bitter gourd (Mormodica charantia) Cultivated in Jaffna District
Authors: Thanuja S. , Sivakanthan S. , Vasantharuba S. 
Published: May 2019

Purpose: Bitter gourd (Mormodica charantia) is a widely cultivated vegetable crop in Jaffna. It is well-known to possess medicinal properties, mainly because of its antioxidant properties. Changes in the antioxidant properties of vegetables during different cooking methods have an influence on dietary nutrition. Therefore, this study is aimed at determining the effect of three cooking methods on the antioxidant properties of bitter gourd. Research Method: Fresh bitter gourds were cut into small pieces and subjected to three different cooking methods (boiling, microwave cooking and stir-frying). The conditions of the cooking methods were; boiling at 100ºC for 14 min, microwave cooking at 560W for 4 min and stir-frying at 230ºC for 15 min. Ethanol (70 %, v/v) was used to extract the antioxidants from fresh and cooked samples and antioxidant properties were determined as total phenolic content (TPC), total flavonoid content (TFC), antioxidant capacity and DPPH radical scavenging activity. Results were analyzed using oneway analysis of variance using Statistical Analysis System (SAS 9.1). Findings: TPC, TFC, antioxidant capacity and DPPH radical scavenging activity (IC50 value) of fresh bitter gourd were 27.47±1.52 mg gallic acid equivalent/g dry matter, 19.36±2.01 mg catechin equivalent/g dry matter, 103.55±3.60 mg ascorbic acid equivalent/g dry matter and 0.210±0.008 mg/mL respectively. Compared to the antioxidant properties of fresh bitter gourd, boiling has significantly (p<0.05) increased TPC (by 48.63%) and TFC (by 42.77%) while, antioxidant capacity was reduced (by 17.84%). However, TPC, TFC, and antioxidant capacity of bitter gourd were reduced by 38.70%, 40.13% and 23.55%, respectively, after microwave cooking and 77.94%, 75.88% and 67.77%, respectively, after stir-frying. Thus, it can be concluded that boiling found to be the better method than other two methods to retain antioxidant properties of the bitter gourd. Originality/ Value: This study could be useful to create the awareness among the people on different cooking methods to retain as much of the antioxidant as possible in order to get benefited by the consumption of bitter gourd.
Morphological Characterization and Molecular Identification of Stem-end Rot Associated Fungal Species Isolated from ‘Karutha Colomban’ Mango Fruits in Sri Lanka
Authors: Ekanayake G. , Abeywickrama K. , Daranagama A. , Kannangara S. 
Published: May 2019

Purpose: Stem-End Rot (SER) is one of the most frequently found mango postharvest diseases in many countries including Sri Lanka. Availability of a significantly detailed study on morphological and molecular characterization of the SER associated fungal species is comparatively low. The present study has been carried out considering the above fact. Research Method: SER disease associated fungi were isolated and identification was carried out using morphological characteristics. Identification was confirmed by phylogenetic analysis of newly generated ITS sequencing data using Maximum Likelihood (ML) with RAxML software (Ver.8.2.10). Findings: From the morphological studies it was observed that the fungal isolates SER1, SER2, SER3 and SER6 produced conidia on Potato Dextrose Agar. Both morphological and molecular results revealed that the isolates of SER1, SER4, SER5, and SER6 which were isolated from diseased Karutha Colomban mango fruits with SER (in Sri Lanka) belong to Lasiodiplodia sp., Nodulisporium sp., Xylaria feejeensis and Pestalotiopsis sp. respectively. Both SER2 and SER3 were confirmed as Phomopsis sp. During the present study two new fungal species (Xylaria spp. and Nodulisporium spp.) were also identified for the first time from SER of Karutha Colomban mango fruits. Research Limitations: The pathogenicity of these isolates will be tested in near future, since the study was mainly focused on the isolation and identification of the SER associated fungal species. Originality/ Value: Results of the present study will be very valuable for stakeholders in Agricultural sector, before designing control strategies at post-harvest level in order to minimize the loss and extend the storage life of mango.