bluuebunny/crossref_metadata_2025_split huggingface dataset:
Midlife Work-Related Stress is Associated with Late-Life Gray Matter Volume Atrophy
Authors: Sindi Shireen , Kåreholt Ingemar , Spulber Gabriela , Soininen Hilkka , Kivipelto Miia , Solomon Alina 
Published: December 2017

Background: Work-related stress has been associated with an increased dementia risk. However, less is known about the mechanisms that underlie these associations. Objective: The goal is to examine associations between midlife work-related stress and late-life structural brain alterations. Methods: The Cardiovascular Risk Factors, Aging, and Dementia (CAIDE) study participants were randomly selected from independent population-based surveys (mean age 50) in Finland. MRI measurements included gray matter (GM) volume, white matter lesions (WML) and medial temporal atrophy (MTA) (1st re-examination, n = 102); and GM volume, hippocampal volume, WML volume, cortical thickness, and MTA (2nd re-examination, n = 64). Work-related stress comprised a score from two questions administered in midlife. Results: Higher levels of midlife work-related stress were associated with lower GM volume (β= –0.077, p = 0.033) at the first re-examination, even after adjusting for several confounders. No significant associations were found with MTA, WML, or MRI measurements at the second re-examination. Conclusion: Previously shown associations of midlife work-related stress with dementia risk may be at least partly explained by associations with lower GM volume in late-life. The lack of associations at the second re-examination may indicate a critical time window for the effects of midlife work-related stress, and/or selective survival/participation.
Validation of the English Version of the Multimodal Assessment of Capacities in Severe Dementia (MAC-SD): A Cognitive and Functional Scale for Use in Severe Dementia
Authors: Heller Sloane , Steinberg Alan , Sedler Mark 
Published: December 2017

Background: Most existing screening instruments that assess cognition and functioning in dementia suffer from floor effects, limiting their utility in severely demented patients. In 2015, the first author devised a new instrument, The Multimodal Assessment of Capacities in Severe Dementia (MAC-SD), to address this need. The MAC-SD Spanish version proved reliable, valid, and useful for evaluating patients with severe dementia. Objective: This report presents the results of a field trial of the English version of the MAC-SD in a U.S. population. Methods: The MAC-SD was administered to 40 participants with severe dementia along with gold standard measures of cognition and functioning in dementia (the Severe Mini-Mental State Exam, the Severe Impairment Battery, the Global Deterioration Scale, and the Barthel Index of Activities of Daily Living). Data analysis was performed to determine floor effects, reliability, validity, sensitivity to change, and clinical usefulness. Results: The MAC-SD showed no significant floor effects, acceptable reliability, convergent validity with control measures, internal validity, and known groups validity. Of participants who scored the lowest possible on control measures, MAC-SD scores ranged widely. The MAC-SD was highly sensitive to change, and was able to detect changes not seen on control measures. Conclusions: The MAC-SD English version is reliable and valid for use in the cognitive and functional assessment of patients with severe dementia. It gives more detailed information than control instruments about the cognitive and functional abilities of patients with the most severe dementia, and is able to detect changes in these patients not shown by control measures.
Control of the parameters and composition of molecular and cluster beams by means of IR lasers
Authors: Makarov G N 
Published: December 2017

Abstract
The widespread use of molecular and cluster beams in research and practice makes it necessary and relevant to develop methods to control their parameters and composition. Among the methods already developed, those based on using lasers play a considerable role. In this paper, we present results of research on the use of infrared (IR) lasers to control the parameters and composition of molecular and molecular cluster beams.Wedescribe the methods and present research results on neutral molecular beam acceleration due to the vibrational excitation of molecules at the nozzle outlet. We review experimental results on high-energy molecule production and the generation of molecular radicals in secondary pulsed molecular beams obtained by forming a pressure shock in front of a solid surface interacting with an intense pulsed gasdynamically cooled molecular flow, with molecules excited by the laser directly at the secondary beam source. Molecular beam kinetic energies of one to several electron volts have been achieved by this method. The optimum conditions for obtaining high-energy molecules are found. Methods for determining the composition and content of pulsed molecular cluster beams are considered, as are results on the IR laser control of the composition and content of molecular cluster beams using the resonance vibrational excitation of molecules and clusters by laser radiation in the zone of gasdynamic nozzle outlet expansion. Other methods, including laser-based ones, for controlling the velocity of beam atoms and molecules are briefly discussed.
The Complete Transmission Spectrum of WASP-39b with a Precise Water Constraint
Authors: Wakeford H. R. , Sing D. K. , Deming D. , Lewis N. K. , Goyal J. , Wilson T. J. , Barstow J. , Kataria T. , Drummond B. , Evans T. M. , Carter A. L. , Nikolov N. , Knutson H. A. , Ballester G. E. , Mandell A. M. 
Published: December 2017

Abstract
WASP-39b is a hot Saturn-mass exoplanet with a predicted clear atmosphere based on observations in the optical and infrared. Here, we complete the transmission spectrum of the atmosphere with observations in the near-infrared (NIR) over three water absorption features with the Hubble Space Telescope (HST) Wide Field Camera 3 (WFC3) G102 (0.8–1.1 μm) and G141 (1.1–1.7 μm) spectroscopic grisms. We measure the predicted high-amplitude H2O feature centered at 1.4 μm and the smaller amplitude features at 0.95 and 1.2 μm, with a maximum water absorption amplitude of 2.4 planetary scale heights. We incorporate these new NIR measurements into previously published observational measurements to complete the transmission spectrum from 0.3 to 5 μm. From these observed water features, combined with features in the optical and IR, we retrieve a well constrained temperature T
eq = 1030

K, and atmospheric metallicity

solar, which is relatively high with respect to the currently established mass–metallicity trends. This new measurement in the Saturn-mass range hints at further diversity in the planet formation process relative to our solar system giants.
Modeling Type II-P/II-L Supernovae Interacting with Recent Episodic Mass Ejections from Their Presupernova Stars with MESA and SNEC
Authors: Das Sanskriti , Ray Alak 
Published: December 2017

Abstract
We show how dense, compact, discrete shells of circumstellar gas immediately outside of red supergiants affect the optical light curves of Type II-P/II-L supernovae (SNe), using the example of SN 2013ej. Earlier efforts in the literature had used an artificial circumstellar medium (CSM) stitched to the surface of an evolved star that had not gone through a phase of late-stage heavy mass loss, which, in essence, is the original source of the CSM. In contrast, we allow enhanced mass-loss rate from the modeled star during the 16O and 28Si burning stages and construct the CSM from the resulting mass-loss history in a self-consistent way. Once such evolved pre-SN stars are exploded, we find that the models with early interaction between the shock and the dense CSM reproduce light curves far better than those without that mass loss and, hence, having no nearby dense CSM. The required explosion energy for the progenitors with a dense CSM is reduced by almost a factor of two compared to those without the CSM. Our model, with a more realistic CSM profile and presupernova and explosion parameters, fits observed data much better throughout the rise, plateau, and radioactive tail phases as compared to previous studies. This points to an intermediate class of supernovae between Type II-P/II-L and Type II-n SNe with the characteristics of simultaneous UV and optical peak, slow decline after peak, and a longer plateau.
Toward Understanding the 3D Structure and Evolution of Magnetic Flux Ropes in an Extremely Long Duration Eruptive Flare
Authors: Zhou 周振 Zhenjun 军 , Zhang Jie , Wang Yuming , Liu Rui , Chintzoglou Georgios 
Published: December 2017

Abstract
In this work, we analyze the initial eruptive process of an extremely long duration C7.7-class flare that occurred on 2011 June 21. The flare had a 2 hr long rise time in soft X-ray emission, which is much longer than the rise time of most solar flares, including both impulsive and gradual ones. Combining the facts that the flare occurred near the disk center as seen by the Solar Dynamic Observatory (SDO) but near the limb as seen by two Solar Terrestrial Relations Observatory (STEREO) spacecraft, we are able to track the evolution of the eruption in 3D in a rare slow-motion manner. The time sequence of the observed large-scale EUV hot channel structure in the Atmospheric Imaging Assembly (AIA) high-temperature passbands of 94 and 131 Å clearly shows the process of how the sigmoid structure prior to the eruption was transformed into a near-potential post-eruption loop arcade. We believe that the observed sigmoid represents the structure of a twisted magnetic flux rope (MFR), which has reached a height of about 60 Mm at the onset of the eruption. We argue that the onset of the flare precursor phase is likely triggered by the loss of the magnetohydrodynamic equilibrium of a preexisting MFR, which leads to the slow rise of the flux rope. The rising motion of the flux rope leads to the formation of a vertical current sheet underneath, triggering the fast magnetic reconnection that in turn leads to the main phase of the flare and fast acceleration of the flux rope.
The Architecture of the GW Ori Young Triple-star System and Its Disk: Dynamical Masses, Mutual Inclinations, and Recurrent Eclipses
Authors: Czekala Ian , Andrews Sean M. , Torres Guillermo , Rodriguez Joseph E. , Jensen Eric L. N. , Stassun Keivan G. , Latham David W. , Wilner David J. , Gully-Santiago Michael A. , Grankin Konstantin N. , Lund Michael B. , Kuhn Rudolf B. , Stevens Daniel J. , Siverd Robert J. , James David , Gaudi B. Scott , Shappee Benjamin J. , Holoien Thomas W.-S. 
Published: December 2017

Abstract
We present spatially and spectrally resolved Atacama Large Millimeter/submillimeter Array (ALMA) observations of gas and dust orbiting the pre-main-sequence hierarchical triple-star system GW Ori. A forward modeling of the 13CO and C18O J = 2–1 transitions permits a measurement of the total stellar mass in this system,

, and the circumtriple disk inclination,

. Optical spectra spanning a 35 yr period were used to derive new radial velocities and, coupled with a spectroscopic disentangling technique, revealed that the A and B components of GW Ori form a double-lined spectroscopic binary with a period of 241.50 ± 0.05 days; a tertiary companion orbits that inner pair with a period of 4218 ± 50 days. Combining the results from the ALMA data and the optical spectra with three epochs of astrometry in the literature, we constrain the individual stellar masses in the system (

,

,

) and find strong evidence that at least one of the stellar orbital planes (and likely both) is misaligned with the disk plane by as much as 45°. A V-band light curve spanning 30 yr reveals several new ∼30-day eclipse events 0.1–0.7 mag in depth and a 0.2 mag sinusoidal oscillation that is clearly phased with the AB–C orbital period. Taken together, these features suggest that the A–B pair may be partially obscured by material in the inner disk as the pair approaches apoastron in the hierarchical orbit. Lastly, we conclude that stellar evolutionary models are consistent with our measurements of the masses and basic photospheric properties if the GW Ori system is ∼1 Myr old.
Galactic-scale Feedback Observed in the 3C 298 Quasar Host Galaxy
Authors: Vayner Andrey , Wright Shelley A. , Murray Norman , Armus Lee , Larkin James E. , Mieda Etsuko 
Published: December 2017

Abstract
We present high angular resolution multiwavelength data of the 3C 298 radio-loud quasar host galaxy (z = 1.439) taken using the W.M. Keck Observatory OSIRIS integral field spectrograph (IFS) with adaptive optics, the Atacama Large Millimeter/submillimeter Array (ALMA), the Hubble Space Telescope (HST) WFC3, and the Very Large Array (VLA). Extended emission is detected in the rest-frame optical nebular emission lines Hβ, [O iii], Hα, [N ii], and [S ii], as well as in the molecular lines CO (J = 3−2) and (J = 5−4). Along the path of the relativistic jets of 3C 298, we detect conical outflows in ionized gas emission with velocities of up to 1700

and an outflow rate of 450–1500

extended over 12 kpc. Near the spatial center of the conical outflow, CO (J = 3−2) emission shows a molecular gas disk with a rotational velocity of ±150

and total molecular mass (

) of

. On the blueshifted side of the molecular disk, we observe broad extended emission that is due to a molecular outflow with a rate of 2300

and depletion timescale of 3 Myr. We detect no narrow Hα emission in the outflow regions, suggesting a limit on star formation of 0.3

. Quasar-driven winds are evacuating the molecular gas reservoir, thereby directly impacting star formation in the host galaxy. The observed mass of the supermassive black hole is

, and we determine a dynamical bulge mass of

. The bulge mass of 3C 298 lies 2–2.5 orders of magnitude below the expected value from the local galactic bulge—supermassive black hole mass (

) relationship. A second galactic disk observed in nebular emission is offset from the quasar by 9 kpc, suggesting that the system is an intermediate-stage merger. These results show that galactic-scale negative feedback is occurring early in the merger phase of 3C 298, well before the coalescence of the galactic nuclei and assembly on the local

relationship.
Eclipsing Stellar Binaries in the Galactic Center
Authors: Li Gongjie , Ginsburg Idan , Naoz Smadar , Loeb Abraham 
Published: December 2017

Abstract
Compact stellar binaries are expected to survive in the dense environment of the Galactic center. The stable binaries may undergo Kozai–Lidov oscillations due to perturbations from the central supermassive black hole (Sgr A*), yet the general relativistic precession can suppress the Kozai–Lidov oscillations and keep the stellar binaries from merging. However, it is challenging to resolve the binary sources and distinguish them from single stars. The close separations of the stable binaries allow higher eclipse probabilities. Here, we consider the massive star SO-2 as an example and calculate the probability of detecting eclipses, assuming it is a binary. We find that the eclipse probability is ∼30%–50%, reaching higher values when the stellar binary is more eccentric or highly inclined relative to its orbit around Sgr A*.
Weibel Instability in Hot Plasma Flows with the Production of Gamma-Rays and Electron–Positron Pairs
Authors: Nerush E. N. , Serebryakov D. A. , Kostyukov I. Yu. 
Published: December 2017

Abstract
We present the results of the theoretical analysis and numerical simulations of the Weibel instability in two counterstreaming hot relativistic plasma flows, for instance the flows of electron–proton plasmas with rest-mass densities

, Lorentz factors

, and proper temperatures

. The instability growth rate and the filament size at the linear stage are found analytically and are in qualitative agreement with the results of three-dimensional particle-in-cell simulations. In the simulations, incoherent synchrotron emission and pair photoproduction in electromagnetic fields are taken into account. If the plasma flows are dense, fast, and hot enough, the overall energy of the synchrotron photons can be much higher than the energy of the generated electromagnetic fields. Furthermore, a sizable number of positrons can be produced due to the pair photoproduction in the generated magnetic field. We propose a rough criterion to judge copious pair production and considerable synchrotron losses. By means of this criterion, we conclude that the incoherent synchrotron emission and the pair production during the Weibel instability can have implications for the collapsar model of gamma-ray bursts.
Proper Motion of the High-velocity Pulsar in SNR MSH 15-56
Authors: Temim Tea , Slane Patrick , Plucinsky Paul P. , Gelfand Joseph , Castro Daniel , Kolb Christopher 
Published: December 2017

Abstract
We present a measurement of the proper motion of the presumed pulsar in the evolved composite supernova remnant (SNR) MSH 15-56 whose pulsar wind nebula (PWN) has been disrupted by the supernova (SN) reverse shock. Using Chandra X-ray observations acquired over a baseline of 15 years, we measure a pulsar velocity of

and a direction of motion of 14° ± 22° west of south. We use this measurement to constrain a hydrodynamical (HD) model for the evolution of this system, and find that its morphology is well-described by an SNR expanding in an ambient density gradient that increases from east to west. The effect of the density gradient and the pulsar’s motion is an asymmetric interaction between the SN reverse shock and the PWN that displaces the bulk of the PWN material away from the pulsar toward the northeast. The simulation is consistent with an SNR age of 11,000 years, an SN ejecta mass of 10 M
⊙, and an average surrounding density of 0.4 cm−3, but a combination of a higher SN ejecta mass and ambient density can produce a similar SNR morphology at a later age.
Wearable Systems and Methods for Monitoring Psychological and Physical Condition of Soldiers
Authors: Kutilek P. , Volf P. , Viteckova S. , Smrcka P. , Lhotska L. , Hana K. , Krivanek V. , Doskocil R. , Navratil L. , Hon Z. , Stefek A. 
Published: December 2017

From the second half of the 1990s, thanks to more affordable and more powerful information technology and electronical systems for recording based on miniaturized sensors, we can observe a more intensive development of a method of data analysis and a system that monitors the physical and psychological conditions of soldiers. Systems for measuring and evaluation methods of physical and medical data for the diagnostics of physical and psychological state have significantly spread, especially in clinical practice. This study, however, examines the current technologies and usage of the wearable monitoring systems in military field. The result of this study is not only the not-yet published summary of the current state, but also the proposed possibilities of usage and recommendation of specific systems, their sensors and system methods in the military. Thus, the article can serve as a guide for choosing suitable and affordable electronical wearable systems and methods of quantitative evaluation of physical and psychological conditions of people in the military.
Temps et activité selon Unix
Authors: Mélès Baptiste 
Published: December 2017

Nous traiterons ici du concept de temps propre au système d’exploitation Unix, en montrant d’une part comment il se distingue de celui de la machine et de l’autre comment il s’articule à la notion d’activité propre à Unix : celle de processus. Nous exposerons ainsi dans un premier temps la temporalité propre aux machines synchrones définies par John von Neumann dans le « First Draft of a Report on the EDVAC » (1945), avant d’analyser dans le détail le code source de la fonction principale et du pilote d’horloge de la version 6 d’Unix (1975). On verra ainsi qu’il peut exister en informatique plusieurs niveaux d’activité et qu’à ces différents niveaux d’activité correspondent autant d’échelles de temporalité.
Bénéfices du conformisme dans un lycée turc post-républicain
Authors: Ikiz Simruy , Tuncel Gökçe 
Published: December 2017

Cet article, inspiré du colloque « Conformisme, Conservatisme » qui a eu lieu en Turquie les 25 et 26 juillet 2016, porte sur les réflexions des auteurs autour des bénéfices et des déficits du conformisme à partir de leurs propres expériences dans leur « lycée » où elles ont passé neuf ans de leur vie (l’école primaire, le collège et le lycée) à Istanbul. Ce témoignage les a conduites à se tourner vers le passé avec les regards psychanalytiques et sociologiques qui sont les leurs. Par ce témoignage, les auteurs tissent des liens entre la théorie et leur vécu afin d’ouvrir une discussion sur les bénéfices de l’appartenance à cette communauté de lycée une fois lancée dans la vie post-lycée .
L’écoute créative de Cornelius Castoriadis. Pour une métapsychologie de l’imagination
Authors: Faure Cédric 
Published: December 2017

Les théories en sciences humaines et sociales sur l’imagination méconnaissent l’inconscient et la psychanalyse n’a jamais fait de l’imagination une catégorie métapsychologique. Le débat n’a donc pas eu lieu sur une notion pourtant fondamentale. Castoriadis a ouvert une brèche en donnant à l’imagination une place essentielle dans les processus de création sans toutefois lui conférer un statut scientifique. Nous souhaiterions donc, à la suite de Castoriadis, militer pour une entrée en scène de l’imagination dans une métapsychologie contemporaine élargie : en quoi cette notion est-elle nécessaire ? Qu’apporte-t-elle à une écoute renouvelée de la vie psychique ? Son invention nous permet-elle vraiment de découvrir de nouvelles Amériques du monde fantasmatique ?
La contestation au rythme de la Beat Generation
Authors: Veit Camille 
Published: December 2017

Par son énonciation contestataire et collective, la Beat Generation se distingue de la « parlotte » protestataire contemporaine, qui répond de l’insatisfaction individuelle. Sous le halo beat et via l’écriture, Ginsberg, Kerouac, Burroughs et quelques autres trouvèrent à articuler leurs quêtes respectives, éminemment subjectives, au lien social. Trajectoires d’ouverture s’enseignant de l’expérience, elles illustrent en outre une nouvelle organisation du lien social, dont les effets flirtent entre ravage et désenchantement dans la rencontre avec le manque à être auquel le sujet ne peut se dérober.
Plagiarism Detection Process using Data Mining Techniques
Authors: Abid Mahwish , Usman Muhammad , Ashraf Muhammad Waleed 
Published: December 2017

<strong>As the technology is growing very fast and usage of computer systems is increased as compared to the old times, plagiarism is the phenomenon which is increasing day by day. Wrongful appropriation of someone else’s work is known as plagiarism. Manually detection of plagiarism is difficult so this process should be automated. There are various tools which can be used for plagiarism detection. Some works on intrinsic plagiarism while other work on extrinsic plagiarism. Data mining the field which can help in detecting the plagiarism as well as can help to improve the efficiency of the process. Different data mining techniques can be used to detect plagiarism. Text mining, clustering, bi-gram, tri-grams, n-grams are the techniques which can help in this process</strong>