bluuebunny/crossref_metadata_2025_split huggingface dataset:
Rotating Halo Traced by the K-giant Stars from LAMOST and Gaia
Authors: Tian Hao , Liu Chao , Xu Yan , Xue Xiangxiang 
Published: January 2019

Abstract
With the help of Gaia DR2, we are able to obtain the full 6D phase space information for stars from the Large Sky Area Multi-Object Fibre Spectroscopic Telescope DR5. With high precision of the position, velocity, and metallicity, the rotation of the local stellar halo is presented using the K-giant stars with [Fe/H] < −1 dex within 4 kpc from the Sun. By fitting the rotational velocity distribution with the three-Gaussian components, stellar halo, disk, and counterrotating hot population, we find that the local halo progradely rotates with

km s−1, providing the local standard of the rest velocity of V
LSR = 232 km s−1. Meanwhile, we obtain the dispersion of rotational velocity is

km s−1. Although the rotational velocity strongly depends on the choice of V
LSR, the trend of prograde rotation is substantial even when V
LSR is set at as low as 220 km s−1. Moreover, we derive the rotation for subsamples with different metallicities and find that the rotational velocity is essentially not correlated with [Fe/H]. This may hint at a secular evolution origin of the prograde rotation. It shows that the metallicity of the progradely rotating halo is peaked within −1.9 < [Fe/H] < −1.6 without considering the selection effect. We also find a small fraction of counterrotating stars with larger dispersion and a lower metallicity. Finally, the disk component rotates with

km s−1 and

km s−1, which is quite consistent with the metal-weak thick disk population.
Diagnosing the Clumpy Protoplanetary Disk of the UXor Type Young Star GM Cephei
Authors: Huang P. C. , Chen W. P. , Mugrauer M. , Bischoff R. , Budaj J. , Burkhonov O. , Ehgamberdiev S. , Errmann R. , Garai Z. , Hsiao H. Y. , Hu C. L. , Janulis R. , Jensen E. L. N. , Kiyota S. , Kuramoto K. , Lin C. S. , Lin H. C. , Liu J. Z. , Lux O. , Naito H. , Neuhäuser R. , Ohlert J. , Pakštienė E. , Pribulla T. , Qvam J. K. T. , Raetz St. , Sato S. , Schwartz M. , Semkov E. , Takagi S. , Wagner D. , Watanabe M. , Zhang Yu 
Published: January 2019

Abstract
UX Orionis stars (UXors) are Herbig Ae/Be or T Tauri stars exhibiting sporadic occultation of stellar light by circumstellar dust. GM Cephei is such a UXor in the young (∼4 Myr) open cluster Trumpler 37, showing prominent infrared excess, emission-line spectra, and flare activity. Our photometric monitoring (2008–2018) detects (1) an ∼3.43 day period, likely arising from rotational modulation by surface starspots, (2) sporadic brightening on timescales of days due to accretion, (3) irregular minor flux drops due to circumstellar dust extinction, and (4) major flux drops, each lasting for a couple of months with a recurrence time, though not exactly periodic, of about two years. The star experiences normal reddening by large grains, i.e., redder when dimmer, but exhibits an unusual “blueing” phenomenon in that the star turns blue near brightness minima. The maximum extinction during relatively short (lasting ≤50 days) events, is proportional to the duration, a consequence of varying clump sizes. For longer events, the extinction is independent of duration, suggestive of a transverse string distribution of clumps. Polarization monitoring indicates an optical polarization varying ∼3%–8%, with the level anticorrelated with the slow brightness change. Temporal variation of the unpolarized and polarized light sets constraints on the size and orbital distance of the circumstellar clumps in the interplay with the young star and scattering envelope. These transiting clumps are edge-on manifestations of the ring- or spiral-like structures found recently in young stars with imaging in infrared of scattered light, or in submillimeter of thermalized dust emission.
Blue Straggler Stars beyond the Milky Way. IV. Radial Distributions and Dynamical Implications
Authors: Li Chengyuan , Sun Weijia , Hong Jongsuk , Deng Licai , Grijs Richard de , Sills Alison 
Published: January 2019

Abstract
Blue straggler stars (BSSs) have been proposed as powerful indicators to measure the dynamical state of Galactic globular clusters (GCs). Here we examine for the first time whether this framework of BSSs as dynamical clocks, which was specifically developed for Galactic GCs, may also hold for younger GCs in the Large Magellanic Cloud (LMC). Using Hubble Space Telescope observations, we study seven LMC star clusters with ages between ∼700 Myr and 7 Gyr. We confirm that our sample clusters are consistent with the empirical correlation previously derived for Galactic GCs, within a modest tolerance. We suggest that to further examine whether BSSs can measure the dynamical state of their host clusters over an extended range of dynamical ages, more studies of dynamically older Magellanic Cloud clusters are required. We discuss the physical implications of our results in terms of their central, dimensionless King potential, as well as the initial retention fraction of black holes.
Financement de la perte d’indépendance : l’urgence à changer d’outil
Authors: Somme Dominique 
Published: January 2019

L’auteur propose de repenser le débat autour de la mesure de la perte d’indépendance fonctionnelle, une question trop souvent abordée par ses aspects technique ou administratif en omettant ses dimensions économique, éthique et politique. Il expose pourquoi, selon lui, il est urgent au moment d’ouvrir le débat sur les réformes du financement de la perte d’indépendance de modifier en profondeur les règles de distribution des fonds. Il appelle à abandonner les outils actuellement utilisés et qui ne répondent pas aux enjeux actuels : le financement par parcours qui permet d’aborder la question de la pertinence des décisions à la fois dans le champ sanitaire et dans le champ social.
Le nom le plus commun et le nom propre par excellence
Authors: de Gramont Jérôme 
Published: January 2019

Les Thèses pour une ontologie trinitaire de Klaus Hemmerle relient deux questions qui semblent très éloignées : la question de l’ontologie et celle de la théologie. D’un côté le savoir le plus pauvre, celui qui porte sur l’étant, le nom le plus commun. De l’autre la science la plus haute, celle qui porte sur Dieu, le nom propre par excellence. Toute la pensée s’inscrit entre les deux sens du mot « premier », entre ces deux manières de parler (nom commun, nom propre), en allant de l’un (l’étant) vers l’autre (le Dieu trinitaire).
Pattern and categorisation of neurosurgical emergencies
Authors: Kulkarni Dilip 
Published: January 2019

AbstractUsually most of the neurosurgical emergencies have to be operated within 24 hours to 72 hours for better outcome in patient point of view. Depending upon the pattern of neurosurgical conditions, if we categorise these emergency surgeries, taking into consideration the priority of performing the operations the mortality and morbidity will reduce. This will help in better usage of operating room time (OR Time), hospital resources and at the same time not affecting the elective surgical operations.
Fluid management in infants and children during intracranial surgery
Authors: Karnik Hemangi 
Published: January 2019

AbstractFluid management in neurosurgical paediatric patients can be a real challenge due to their different pathophysiology, sensitivity to fluid loss, inability to accurately judge the degree of abnormality and adequacy of replacement in face of limited monitoring. For infants and children undergoing neurosurgical procedures, isotonic fluids should be used for maintenance and replacement to avoid increase in intracranial pressure and maintain cerebral perfusion. Routine use of added dextrose is not needed, but blood glucose monitoring should be done in high risk population. Preoperative deficits and intraoperative blood loss should be closely monitored and treated. Hyponataemia and other electrolyte derangements are common and should be monitored.
Cardiovascular manifestations of subarachnoid haemorrhage
Authors: Manikandan Sethuraman 
Published: January 2019

AbstractSubarachnoid haemorrhage (SAH) is one of the devastating conditions, especially the aneurysmal bleed which has high mortality as well as morbidity. The mortality and morbidity caused by SAH have been recognised to be caused by both neurological and systemic causes. The alterations in systemic and other organ damage could cause death in up to 40% of SAH patients. Among the systemic manifestations, cardiovascular and respiratory complications increase hospitalisation and worsen the outcome. The main pathophysiological mechanism is the increased sympathetic activation causing myocardial necrosis. Various cardiovascular manifestations range from electrocardiogram changes to myocardial ischaemia, cardiac failure and arrhythmias. This review deals with the cardiac manifestations in SAH patients.
Statins for aneurysmal subarachnoid haemorrhage: Another loss in translation
Authors: Chan Matthew 
Published: January 2019

AbstractExperimental evidence suggests that statin attenuates inflammation, oxidation, platelet aggregation and excitotoxicity. In brain ischemic models, statin administration produces vasodilatation and reduces neuronal apoptosis. It was hypothesized that statin administration may improve outcome by reducing delayed ischemic neurological deficit after aneurysmal subarachnoid haemorrhage. Earlier pilot trials suggested demonstrated encouraging results but the recent Simvastatin in Aneurysmal Subarachnoid Haemorrhage Trial, using simvastatin 40 mg per day, failed to demonstrate a benefit. Even at larger doses, simvastatin 80 mg per day did not reduce delayed ischemic neurological deficit. In common with many other interventions, statin represents another translational failure of presumed neuroprotective agents.
Desflurane in neurosurgery: Pros
Authors: Sharma Smita , Jangra Kiran 
Published: January 2019

AbstractNeurosurgery and neuroanaesthesia are making rapid progress, and with this progress, there is the search for excellence and ideal results. The practice of neuroanaesthesia is fairly standardised today, and any debate can only be on the fine-tuning aspects of the techniques. The aim of all research in anaesthesia is to provide the best possible and safest operating conditions and to have a complete recovery at the end of the surgery. The maintenance of anaesthesia for neurosurgery is with balanced general anaesthesia which combines intravenous and inhalational agents. A review of literature shows that desflurane has definite advantages, and hence, it is an integral part of modern neuroanaesthesia.
Intraoperative oxygen embolus and tension pneumocephalus: Is hydrogen peroxide the culprit?
Authors: Dsouza Supriya , Parakh Anil , Sarma Chitra , Kulkarni Adarsh , Baviskar Ajit 
Published: January 2019

AbstractHydrogen peroxide (H2O2) irrigation is commonly utilised in neurosurgical and non-neurosurgical procedures for its bactericidal and haemostatic effects. Tension pneumocephalus and venous air embolism are potentially disastrous neurological complications mostly seen after intracranial surgery in sitting position and trauma. We present a case of oxygen embolus and tension pneumocephalus after H2O2 irrigation during craniotomy in supine position.
An unusual presentation of autonomic dysreflexia-autonomic dysreflexia due to pneumatic stockings
Authors: Madan Ankita , Bhargava Saurabh , Sharma Meenaxi , Marwah Karan 
Published: January 2019

AbstractAutonomic dysreflexia is a potentially dangerous clinical emergency associated with spine injury at or above T6 level. Identification of triggering factor and its removal is a very important for the management of this condition. We hereby report a rare presentation of autonomic dysreflexia in a 57-year-old male, a case of D9–L1 arteriovenous malformation (AVM) with prolapsed intervertebral disc L3–L4 who underwent laminectomy from D6 to L4 level followed by excision of the AVM under general anaesthesia. He developed symptoms and signs suggestive of autonomic dysreflexia following application of intermittent compression pneumatic stockings which were reversed after the removal of the stimulus. Application of intermittent compression pneumatic stockings is an unusual cause of autonomic dysreflexia.
Assessment of heart rate variability during different propofol effect site concentrations in patients with supratentorial tumours: A pilot study
Authors: Mittal Mohit , Muthuchellappan Radhakrishnan , Umamaheswara Rao G. , Kavyashree K. , Vishnuprasad K. 
Published: January 2019

Abstract
Background: Impaired autonomic function (AF) can result in adverse cardiovascular events during the perioperative period. Literature suggests that patients with intracranial space-occupying lesions experience impaired AF depending on the site of tumour and associated raised intracranial pressure (ICP). The complex interaction between general anaesthetics, AF and intracranial tumours with raised ICP has not been extensively studied. Objective: This study was aimed at evaluating the cardiac AF (in terms of heart rate variability [HRV]) in patients undergoing surgery for supratentorial tumours, at baseline and at different propofol effect site concentrations (Ce) during anaesthetic induction and the results were compared with patients undergoing non-cranial surgeries. Materials and Methods: In this prospective observational study, consecutive adult patients undergoing surgeries for supratentorial tumour (study group) and brachial plexus injury (control group) were recruited. Electrocardiogram was recorded for 5 min at three time points – before propofol induction, at propofol Ce 2 μg/ml and at Ce 4 μg/ml. Results: Forty-five patients were recruited, 24 in study group and 21 in control group. In spite of similar baseline heart rate and blood pressure, low frequency (LF), high frequency (HF) and total power were significantly higher in control group. Baseline LF/HF, though higher in patients with intracranial tumour (craniotomy: 2.2 ± 2.2, control: 1.2 ± 1.1), was not significantly different between the two groups (P = 0.197). HRV variables in both the groups changed the same way in response to the increasing propofol Ce. Conclusion: HRV measurements were significantly different at baseline between the two groups. Following propofol administration, haemodynamic changes and HRV changes were similar in both the groups and also between the two groups.
PHYSICO-MECHANICAL AND DYNAMIC MECHANICAL PROPERTIES OF META-PENTADECENYL PHENOL FUNCTIONALIZED ACRYLONITRILE–BUTADIENE RUBBER NANOCLAY COMPOSITES
Authors: Samantarai Satyajit , Nag Ahindra , Singh Nitesh , Dash Debabrata , Nando Golok B. , Das Narayan Ch. 
Published: January 2019

ABSTRACT
The physico-mechanical and thermo-mechanical properties of meta-pentadecenyl phenol (cardanol) functionalized acrylonitrile–butadiene rubber (CGNBR) composites containing sodium montmorillonite clay were determined via studies on the functionalization of NBR by grafting cardanol onto its backbone main chain in the latex stage using benzoyl peroxide as a free radical initiator. Results show an improvement in technical properties for functionalized NBR nanocomposites over the NBR nanocomposite. Air and ASTM 3 oil aging studies at 100 °C confirmed an increase in tensile strength and a decrease in elongation at break for CGNBR compared to the dioctyl phthalate plasticized NBR nanocomposite. Fire and flame retardancy studies showed an increased limiting oxygen index for functionalized NBR over the NBR nanoclay composite. Results delineate the method of preparation and characterization of functionalized NBR and oil plasticized NBR nanoclay composites to achieve an improved oil resistance effect for functionalized NBR over NBR nanocomposite.
Whither the Public Internet?
Authors: Lehr William , Clark David , Bauer Steve , Berger Arthur , Richter Philipp 
Published: January 2019

AbstractThis article addresses the question of what should be meant by the phrase the Internet, or equivalently, the public Internet. Since its origins in the 1960s, the Internet has changed significantly in terms of the networks and technologies, services that are supported, and industry players who participate in the Internet ecosystem, growing in global economic and social importance. This article discusses the changing role of the network operators and service providers that support the public Internet, and the relationship between what might be considered the public Internet and other elements of the global infrastructure. Herein, we explain why the quest for a single definition for the Internet is likely a fool’s errand, while recognizing that there remains a need to understand what the concept means in light of its growing importance as a topic of policy concern. Instead of a definition, we propose a three-lens framework through which to evaluate technical and market trends that are changing the Internet and assist in determining whether those changes are or are not consistent with what we view as worth preserving in that which we refer to as the Internet.
Branding the 'Beur' Author
Authors: Kleppinger Kathryn A. 
Published: January 2019

Branding the Beur Author analyzes mainstream media promotion of literature written by the descendants of North African immigrants to France (often called beurs). Launched in the early 1980s, conversations between journalists and ‘beur’ authors delve into contemporary debates such as racism in the 1980s and Islam in French society in the 1990s. But the interests of journalists looking for sensational subject matter also heavily shape the promotion and reception of these novels: only the ‘beur’ authors who use a realist style to write about the challenges faced by the North African immigrant population in France—and who engage on-air with French identity politics and immigration—receive multiple invitations to participate in interviews. Previous scholarship has taken a necessary first step by analyzing the social and political stakes of this literature (using labels such as ‘beur’ and/or ‘banlieue,’ to designate its urban, economically distressed setting), but this book argues that this approach reproduces the selection criteria deployed by the media that determine which texts receive commercial and critical support. By demonstrating how minority-based literary labels such as ‘francophone’ and ‘postcolonial’ are always already defined by the socio-political context in which such works are published and promoted, this book establishes that these labels are tautological and cannot reflect the thematic and stylistic richness of beur (and other minority) production in France.
Influence de l’aération du massif filtrant sur les performances épuratoires du procédé d’infiltration-percolation
Authors: Bali Mahmoud 
Published: January 2019

L’infiltration-percolation est un procédé extensif de traitement des eaux usées urbaines permettant la dégradation de la matière organique et l’oxydation de l’azote. L’objectif principal de ce travail de recherche est d’étudier l’influence de l’aération du massif filtrant sur les performances épuratoires du procédé d’infiltration-percolation. Les résultats d’analyses ont montré que les colonnes de laboratoire équipées de systèmes d’aération ont favorisé les meilleurs taux d’abattement de la pollution organique et azotée. La matière organique exprimée en termes de DCO (demande chimique en oxygène) a été éliminée à hauteur de 58,35 % et 81,11 % respectivement pour les colonnes d’infiltration dépourvue et pourvue d’un système d’aération centrale et périphérique. Les rendements d’abattement de l’azote ammoniacal ont été respectivement 74,11 % et 92,14 %. Les résultats expérimentaux ont montré aussi que la capacité d’oxydation du filtre dépend de la réoxygénation du massif filtrant. Plus le renouvellement de la phase gazeuse du milieu poreux est assuré, meilleure est la capacité d’oxydation.
Alkanolamines – Method for the determination of 11 alkanolamines in workplace air using ion chromatography (IC) [Air Monitoring Methods, 2018]
Authors: Breuer D. , Blaskowitz M. , Ansari Eshlaghi P. , Hebisch R. , Brock T.H. , Hartwig A. ,   MAK Commission
Published: January 2019

Abstract

This analytical method is a validated measurement procedure for the determination of 11 alkanolamines such as 2‐aminoethanol, diethanolamine, triethanolamine, 2‐amino‐2‐methyl‐1‐propanol, 2‐(dimethylamino)ethanol, 2‐(2‐aminoethoxy)ethanol, methyl diethanolamine, 4‐amino‐1‐butanol, (S)‐3‐amino‐1,2‐propanediol, 1‐amino‐2‐propanol and 2‐amino‐2‐methyl‐1,3‐propanediol in workplace air averaged over the sampling period after personal or stationary sampling. Sampling is performed by drawing a defined volume of air through a quartz fibre filter impregnated with methanesulfonic acid. The filter is positioned in a GSP sampling head which comply with the requirement of EN 481 for inhalable aerosols and EN 13936 for particle/vapour mixtures. After solvent extraction the sample solution is analysed by means of ion chromatography with a conductivity detector. The quantitative determination of the alkanolamines is based on calibration functions obtained by means of multiple‐point calibrations. The limit of quantification for an individual alkanolamine is in the range from 0.087 to 0.58 mg/m
3
.

Joint Publication of the Analytical Subcommittee of the Chemistry Board of Experts of the Expert Committee Raw Materials and Chemical Industry of the German Social Accident Insurance and the working group “Air Analyses” of the Permanent Senate Commission of the DFG for the Investigation of Health Hazards of Chemical Compounds in the Work Area.
Method for the determination of hexavalent chromium in workplace air using photometry [Air Monitoring Methods, 2019]
Authors: Schneider W. , Brock T.H. , Hebisch R. , Hartwig A. ,   MAK Commission
Published: January 2019

Abstract
This analytical method is a validated measurement procedure for the determination of hexavalent chromium in workplace air averaged over the sampling period after personal or stationary sampling. Sampling is performed by drawing a defined volume of air through a quartz fibre filter located in a GSP sampling head using a suitable flow‐regulated pump. The flow rate is set to 3.5 or 10 L/min with a recommended air sample volume of 420 or 1200 L. The collected hexavalent chromium oxidised 1,5‐diphenylcarbazide to 1,5‐diphenylcarbazone, which forms a red‐violet coloured complex with the generated trivalent chromium. The filtered extract is measured photometrically at 540 nm after a waiting time of 30 minutes within a period of 15 minutes. The quantitative determination is based on a calibration function obtained by means of multi‐point calibrations. The absolute limit of quantification (LOQ) is 0.1 µg for hexavalent chromium deposited on the filter. The mean recovery was 104% and the expanded uncertainty for hexavalent chromium was approx. 20%.
Joint Publication of the Analytical Subcommittee of the Chemistry Board of Experts of the Expert Committee Raw Materials and Chemical Industry of the German Social Accident Insurance and the working group “Air Analyses” of the Permanent Senate Commission of the Deutsche Forschungsgemeinschaft for the Investigation of Health Hazards of Chemical Compounds in the Work Area.
Addendum zu Nickel (Nickelmetall, ‐oxid, ‐carbonat, ‐sulfid, sulfidische Erze) [BAT Value Documentation in German language, 2019]
Authors: Nasterlack M. , Walter D. , Drexler H. , Hartwig A. ,   MAK Commission
Published: January 2019

AbstractIn 2018 the German Commission for the Investigation of Health Hazards of Chemical Compounds in the Work Area has re‐evaluated the correlation (EKA) between inhalational exposure to nickel and sparingly soluble nickel compounds (nickel as nickel metal, nickel sulphide, sulphidic ores, nickel oxide, nickel carbonate) and urinary nickel excretion. The update and evaluation of the available literature led to the conclusion that the EKA correlation could be confirmed for exposures in the range between 100 and 500 µg Ni/m3. An extrapolation of the regression equation to the low dose range turned out to be impossible for both formal and practical reasons.