bluuebunny/crossref_metadata_2025_split huggingface dataset:
ANALYSIS OF THE NETWORK WITH MULTIPLE CLASSES OF POSITIVE CUSTOMERS AND SIGNALS AT A NON-STATIONARY REGIME
Authors: Matalytski M. , Kopats D. 
Published: July 2018

The object of research is G-network with positive customers and signals of multiple classes. The present paper describes an analysis of this network at a non-stationary regime, also provided a description of method for finding non-stationary state probabilities.At the beginning of the article, a description of the network with positive customers and signals is given. A signal when entering the system destroys a positive customer of its type or moves the customer of its type to another system. Streams of positive customers and signals arriving to each of the network systems are independent. Selection of positive customers of all classes for service – randomly. For non-stationary state probabilities of the network, the system of Kolmogorov difference-differential equations (DDE) has been derived. It is solved by a modified method of successive approximations, combined with the method of series. The convergence of successive approximations with time has been proved to the stationary distribution of probabilities, the form of which is indicated in the article, and the sequence of approximations converges to the unique solution of the DDE system. Any successive approximation is representable in the form of a convergent power series with an infinite radius of convergence, the coefficients of which satisfy recurrence relations, which is convenient for computer calculations.The obtained results can be applied for modeling behavior of computer viruses and attack in computer systems and networks, for example, as model impact of some file viruses on server resources.
Developmental changes in articulation rate and phonic groups during narration in French children aged four to eleven years
Authors: COLLETTA Jean-Marc , PELLENQ Catherine , HADIAN-CEFIDEKHANIE Ali , ROUSSET Isabelle 
Published: July 2018

AbstractThis paper reports on an original study designed to investigate age-related change in the way French children produce speech during oral narrative, considering both prosodic parameters – speaking rate and duration of the prosodic speech unit – and linguistic structure. Eighty-five French children aged four to eleven years were asked to tell a story after they were shown an excerpt from an animated film. All their remarks were transcribed and coded using ELAN as an annotation tool. Each narrative was analyzed for duration, articulation rate, and linguistic components (i.e., number of phonic groups, syllables, words, clauses). All measures were found to increase with age, with the duration of the phonic group and its linguistic structure showing the stronger differences. Results contribute to providing reference data on speech production during childhood, and they suggest the existence of two distinct developmental patterns in narrative production.
Japanese and Chinese infrastructure development strategies in Central Asia
Authors: Dadabaev Timur 
Published: July 2018

AbstractThis paper compares Japanese and Chinese infrastructure development strategies in post-Soviet Central Asia (CA) by analyzing the similarities and differences in the approaches of the two Asian economic powers. This paper develops several arguments with respect to the Japanese and Chinese approaches to infrastructure development in CA. This paper argues that the discourse of mutually exclusive interests in China and Japan's development of various infrastructure-related projects in CA is empirically unproven. Most of the Chinese engagements emphasize the creation of energy and transportation infrastructure (construction), while Japan's main areas of focus are the maintenance, modernization, and rehabilitation of current infrastructure. Thus, this paper suggests that China positions itself as CA's leading economic partner, while Japan is CA's leading assistance provider. These two roles have different implications. Furthermore, the current infrastructure engagements of Japan (from assistance to partnership) and China (from exploitation to contribution to the region) in CA demonstrate both countries’ attempts to adjust and search for new opportunities.
Stellar SiO masers in the Galaxy: The Bulge Asymmetries and Dynamic Evolution (BAaDE) survey
Authors: Sjouwerman L. O. , Pihlström Y. M. , Rich R. M. , Claussen M. J , Morris M. R. ,   the BAaDE collaboration
Published: July 2018

AbstractCircumstellar SiO masers can be observed in red giant evolved stars throughout the Galaxy. Since stellar masers are not affected by non-gravitational forces, they serve as point-mass probes of the gravitational potential and form an excellent sample for studies of the Galactic structure and dynamics. Compared to optical studies, the non-obscured masers are in particular valuable when observed close to the highly obscured Galactic Bulge and Plane. Their line-of-sight velocities can easily be obtained with high accuracy, proper motions can be measured and distances can be estimated. Furthermore, when different mass and metallicity effects can be accounted for, such a large sample will highlight asymmetries and evolutionary traces in the sample. In our Bulge Asymmetries and Dynamic Evolution (BAaDE) survey we have searched 20,000 infrared selected evolved stars for 43 GHz SiO masers with the VLA in the northern Bulge and Plane and are in the process of observing another 10,000 stars for 86 GHz SiO masers with ALMA in the southern Bulge. Our instantaneous detection rate in the Bulge is close to 70%, both at 43 and 86 GHz, with occasionally up to 7 simultaneous SiO transitions observed in a single star. Here we will outline the BAaDE survey, its first results and some of the peculiar maser features we have observed. Furthermore we will discuss the prospects for obtaining proper motions and parallaxes for individual maser stars to reconstruct individual stellar orbits.
Expansion of methanol maser rings
Authors: Bartkiewicz Anna , Sanna Alberto , Szymczak Marian , Moscadelli Luca , van Langevelde Huib 
Published: July 2018

AbstractRing−like sources of 6.7 GHz methanol maser emission were discovered a decade ago with the European VLBI Network. In the past years we have been incessantly working to understand the nature of these rings. In general, the methanol rings do not coincide with H II regions nor they show 22 GHz water maser emission. Here, we present a proper motion study over a time baseline up to 10.5 years for the first sub-sample of methanol maser rings. Our findings suggest that in three targets G23.207−00.377, G23.389+00.185, and G23.657−00.127, such rings form in outflows or even in winds close to the central sources, and the masers trace slow proper motions of a few km s−1 typically.
Eight new astrometry results of 6.7 GHz CH3OH and 22 GHz H2O masers in the Perseus arm
Authors: Sakai Nobuyuki ,   BeSSeL and VERA projects members
Published: July 2018

AbstractWe report astrometric results for seven 6.7 GHz CH3OH and one 22 GHz H2O masers in the Perseus arm with VLBA and VERA observations. Among the eight sources, we succeeded in obtaining trigonometric parallaxes for all sources, except G098.03+1.44 at 6.7 GHz band. By combining our results with previous astrometry results (Choi et al. 2014), we determined an arm width of 0.41 kpc and a pitch angle of 8.2 ± 2.5 deg for the Perseus arm. By using a large sample of the Perseus arm (26 sources), we examined the three-dimensional, non-circular motions (defined as U, V and W) of sources in the Perseus arm as a function of the distance (D) perpendicular to the arm. Interestingly, we found a weighted mean of <U > = 12.7 ± 1.2 km s−1 for 14 sources with D < 0 kpc (i.e. sources on the interior side of the arm) and <U > = −0.3 ± 1.5 km s−1 for 12 sources with D > 0 kpc (i.e. sources exterior to the arm). These findings might be the first observational indication of the ”damping phase of a spiral arm” suggested by the non-steady spiral arm model of Baba et al. (2013). The small pitch angle of the Perseus arm (< 10 deg) also supports the damping phase, based on ”pitch angle vs. arm amplitude” relation shown in Grøsbol et al. (2004).
ALMA observations of submillimeter H2O and SiO lines in Orion Source I
Authors: Hirota Tomoya , Machida Masahiro N. , Matsushita Yuko , Motogi Kazuhito , Matsumoto Naoko , Kim Mikyoung , Burns Ross A. , Honma Mareki 
Published: July 2018

AbstractWe present observational results of the submillimeter H2O and SiO lines toward a candidate high-mass young stellar object Orion Source I using ALMA. The spatial structures of the high excitation lines at lower-state energies of >2500 K show compact structures consistent with the circumstellar disk and/or base of the northeast-southwest bipolar outflow with a 100 au scale. The highest excitation transition, the SiO (v=4) line at band 8, has the most compact structure. In contrast, lower-excitation transitions are more extended than 200 au tracing the outflow. Almost all the line show velocity gradients perpendicular to the outflow axis suggesting rotation motions of the circumstellar disk and outflow. While some of the detected lines show broad line profiles and spatially extended emission components indicative of thermal excitation, the strong H2O lines at 321 GHz, 474 GHz, and 658 GHz with brightness temperatures of >1000 K show clear signatures of maser action.
Understanding high-mass star formation through KaVA observations of water and methanol masers
Authors: Kim Kee-Tae , Hirota Tomoya , Sugiyama Koichiro , Kim Jungha , Byun Do-Young , Chibueze James , Hachisuka Kazuya , Hu Bo , Hwang Eodam , Kang Ji-Hyun , Kim Jeong-Sook , Kim Mikyoung , Liu Tie , Matsumoto Naoko , Motogi Kazuhito , Oh Chung Sik , Sunada Kazuyoshi , Wu Yuanwei ,   KaVA star formation group
Published: July 2018

AbstractDespite their importance in the formation and evolution of stellar clusters and galaxies, the formation of high-mass stars remains poorly understood. We recently started a systematic observational study of the 22 GHz water and 44 GHz class I methanol masers in high-mass star-forming regions as a four-year KaVA large program. Our sample consists of 87 high-mass young stellar objects (HM-YSOs) in various evolutionary phases, many of which are associated with two or more different maser species. The primary scientific goals are to measure the spatial distributions and 3-dimensional velocity fields of multiple maser species, and understand the dynamical evolution of HM-YSOs and their circumstellar structures, in conjunction with follow-up observations with JVN/EAVN (6.7 GHz class II methanol masers), VERA, and ALMA. In this paper we present details of our KaVA large program, including the first-year results and observing/data analysis plans for the second year and beyond.
VLBI astrometry of a water maser source in the Sgr B2 complex with VERA
Authors: Sakai Daisuke , Oyama Tomoaki , Nagayama Takumi , Honma Mareki , Kobayashi Hideyuki 
Published: July 2018

AbstractWe have conducted astrometric observations toward a 22 GHz water maser source associated with the Sgr B2 complex in the Galactic center region with VERA (VLBI exploration of Radio Astrometry). We measured a trigonometric parallax and absolute proper motion of the Sgr B2 complex with respect to an extra-galactic source by observing the water maser source at 10 epochs from 2014 to 2017. The measured distance was 7.52+3.01−1.67 kpc for the Sgr B2M region.We also succeeded to measure internal motions of maser spots in Sgr B2M, and N region. The number of spots which we could measure the internal motions is about 400. The distribution of the maser spots shows that the maser spots are associated with envelope of HII region seen in radio continuum image obtained with VLA and ALMA. We discuss relative motions between Sgr B2M, and N by using the internal motion.
A Legacy in Fossils: a Tribute to Stan(ley) Wood – Preface
Authors: Fraser Nicholas C. , Smithson Timothy R. , Clack Jennifer A. 
Published: July 2018

ABSTRACTStan Wood had a gift for finding exceptional Early Carboniferous fossils. Among them are 32 type specimens. His discoveries significantly changed our understanding of the history of life on Earth. Many of the fossils he collected are on display in museums across the UK and the localities he discovered continue to yield important new material. Here we briefly review some of Stan Wood's key achievements and describe the legacy he left.
Investigation of the Abnormal Quasi 2‐Day Wave Activities During the Sudden Stratospheric Warming Period of January 2006
Authors: Gu Sheng‐Yang , Dou Xiankang , Pancheva Dora , Yi Wen , Chen Tingdi 
Published: July 2018

AbstractA quasi 2‐day wave (QTDW) during the austral summer period usually coincides with a sudden stratospheric warming (SSW) event in the winter hemisphere, while the SSW influences on QTDWs are not totally understood. In this work, the hourly Navy Operational Global Atmospheric Prediction System‐Advanced Level Physics High Altitude reanalysis data sets during January/February 2006 are utilized to study the contribution of a major SSW on the anomalous QTDW activities during the same period. Our new findings are generalized as follows: (1) The summer easterly is enhanced during a SSW event due to the interhemispheric coupling, which is clearly indicated by the anomalous cross‐equator circulation from the winter to summer mesosphere. (2) The enhanced summer easterly could sustain critical layers for QTDWs with larger phase speeds (e.g., smaller zonal wave number or shortwave period) and strengthen the summer easterly barotropic/baroclinic instabilities, which are essential for the QTDW amplification through wave‐mean flow interactions. This is why a strong westward QTDW with zonal wave number 2 is identified besides the conventionally dominant wave mode of wave number 3, and their periods are only ~42–45 hr during January 2006. (3) The strong winter planetary waves during SSW periods facilitate the occurrence of the nonlinear interaction between QTDWs and stationary planetary waves, which is strongly suggested by the abnormal temporal variations of wave number 2 and wave number 3 QTDWs. We conclude that the anomalous QTDW behaviors in summer mesosphere during January 2006 are associated with the major SSW event in the winter stratosphere.
The evolution of ecological facilitation within mixed-species biofilms in the mouse gastrointestinal tract
Authors: Lin Xiaoxi B , Wang Tuo , Stothard Paul , Corander Jukka , Wang Jun , Baines John F , Knowles Sarah C L , Baltrūnaitė Laima , Tasseva Guergana , Schmaltz Robert , Tollenaar Stephanie , Cody Liz A , Grenier Theodore , Wu Wei , Ramer-Tait Amanda E , Walter Jens 
Published: July 2018

Abstract
The eco-evolutionary interactions among members of the vertebrate gut microbiota that ultimately result in host-specific communities are poorly understood. Here we show that Lactobacillus reuteri coexists with species that belong to the Lactobacillus johnsonii cluster (L. johnsonii, L. gasseri, and L taiwanensis) in a taxonomically wide range of rodents, suggesting cohabitation over evolutionary times. The two dominant Lactobacillus species found in wild mice establish a commensalistic relationship in gastric biofilms when introduced together into germ-free mice in which L. reuteri facilitates colonization of L. taiwanensis. Genomic analysis revealed allopatric diversification in strains of both species that originated from geographically separated locations (Scotland and France). Allopatry of the strains resulted in reduced formation of mixed biofilms in vitro, indicating that interspecies interactions in gastric Lactobacillus-biofilms are the result of an adaptive evolutionary process that occurred in a biogeographical context. In summary, these findings suggest that members within the vertebrate gut microbiota can evolve inter-dependencies through ecological facilitation, which could represent one mechanism by which host-specific bacterial communities assemble across vertebrate species and an explanation for their spatial and biogeographic patterns.
Recurrent homozygous deletion of DROSHA and microduplication of PDE4DIP in pineoblastoma
Authors: Snuderl Matija , Kannan Kasthuri , Pfaff Elke , Wang Shiyang , Stafford James M. , Serrano Jonathan , Heguy Adriana , Ray Karina , Faustin Arline , Aminova Olga , Dolgalev Igor , Stapleton Stacie L. , Zagzag David , Chiriboga Luis , Gardner Sharon L. , Wisoff Jeffrey H. , Golfinos John G. , Capper David , Hovestadt Volker , Rosenblum Marc K. , Placantonakis Dimitris G. , LeBoeuf Sarah E. , Papagiannakopoulos Thales Y. , Chavez Lukas , Ahsan Sama , Eberhart Charles G. , Pfister Stefan M. , Jones David T. W. , Karajannis Matthias A. 
Published: July 2018

AbstractPineoblastoma is a rare and highly aggressive brain cancer of childhood, histologically belonging to the spectrum of primitive neuroectodermal tumors. Patients with germline mutations in DICER1, a ribonuclease involved in microRNA processing, have increased risk of pineoblastoma, but genetic drivers of sporadic pineoblastoma remain unknown. Here, we analyzed pediatric and adult pineoblastoma samples (n = 23) using a combination of genome-wide DNA methylation profiling and whole-exome sequencing or whole-genome sequencing. Pediatric and adult pineoblastomas showed distinct methylation profiles, the latter clustering with lower-grade pineal tumors and normal pineal gland. Recurrent variants were found in genes involved in PKA- and NF-κB signaling, as well as in chromatin remodeling genes. We identified recurrent homozygous deletions of DROSHA, acting upstream of DICER1 in microRNA processing, and a novel microduplication involving chromosomal region 1q21 containing PDE4DIP (myomegalin), comprising the ancient DUF1220 protein domain. Expresion of PDE4DIP and DUF1220 proteins was present exclusively in pineoblastoma with PDE4DIP gain.
Abnormal RNA stability in amyotrophic lateral sclerosis
Authors: Tank E. M. , Figueroa-Romero C. , Hinder L. M. , Bedi K. , Archbold H. C. , Li X. , Weskamp K. , Safren N. , Paez-Colasante X. , Pacut C. , Thumma S. , Paulsen M. T. , Guo K. , Hur J. , Ljungman M. , Feldman E. L. , Barmada S. J. 
Published: July 2018

AbstractAmyotrophic lateral sclerosis (ALS) and frontotemporal dementia (FTD) share key features, including accumulation of the RNA-binding protein TDP-43. TDP-43 regulates RNA homeostasis, but it remains unclear whether RNA stability is affected in these disorders. We use Bru-seq and BruChase-seq to assess genome-wide RNA stability in ALS patient-derived cells, demonstrating profound destabilization of ribosomal and mitochondrial transcripts. This pattern is recapitulated by TDP-43 overexpression, suggesting a primary role for TDP-43 in RNA destabilization, and in postmortem samples from ALS and FTD patients. Proteomics and functional studies illustrate corresponding reductions in mitochondrial components and compensatory increases in protein synthesis. Collectively, these observations suggest that TDP-43 deposition leads to targeted RNA instability in ALS and FTD, and may ultimately cause cell death by disrupting energy production and protein synthesis pathways.
Lgl1 controls NG2 endocytic pathway to regulate oligodendrocyte differentiation and asymmetric cell division and gliomagenesis
Authors: Daynac Mathieu , Chouchane Malek , Collins Hannah Y. , Murphy Nicole E. , Andor Noemi , Niu Jianqin , Fancy Stephen P. J. , Stallcup William B. , Petritsch Claudia K. 
Published: July 2018

AbstractOligodendrocyte progenitor cells (OPC) undergo asymmetric cell division (ACD) to generate one OPC and one differentiating oligodendrocyte (OL) progeny. Loss of pro-mitotic proteoglycan and OPC marker NG2 in the OL progeny is the earliest immunophenotypic change of unknown mechanism that indicates differentiation commitment. Here, we report that expression of the mouse homolog of Drosophila tumor suppressor Lethal giant larvae 1 (Lgl1) is induced during OL differentiation. Lgl1 conditional knockout OPC progeny retain NG2 and show reduced OL differentiation, while undergoing more symmetric self-renewing divisions at the expense of asymmetric divisions. Moreover, Lgl1 and hemizygous Ink4a/Arf knockouts in OPC synergistically induce gliomagenesis. Time lapse and total internal reflection microscopy reveals a critical role for Lgl1 in NG2 endocytic routing and links aberrant NG2 recycling to failed differentiation. These data establish Lgl1 as a suppressor of gliomagenesis and positive regulator of asymmetric division and differentiation in the healthy and demyelinated murine brain.
Differential temporal salience of earning and saving
Authors: Hu Kesong , De Rosa Eve , Anderson Adam K. 
Published: July 2018

AbstractPeople are often characterized as poor savers. Here we examined whether cues associated with earning and saving have differential salience for attention and action. We first modeled earning and saving after positive and negative variants of monetary reinforcement, i.e., gains versus avoiding loss. Despite their equivalent absolute magnitude in a monetary incentive task, colors predicting saving were judged to appear after those that predicted earning in a temporal-order judgment task. This saving posteriority effect also occurred when savings were framed as earnings that come slightly later. Colors predicting savings, whether they acquired either negative or positive value, persisted in their posteriority. An attentional asymmetry away from money-saved relative to money-earned, potentially contributes to decreased everyday salience and future wealth.
Collective magnetism in an artificial 2D XY spin system
Authors: Leo Naëmi , Holenstein Stefan , Schildknecht Dominik , Sendetskyi Oles , Luetkens Hubertus , Derlet Peter M. , Scagnoli Valerio , Lançon Diane , Mardegan José R. L. , Prokscha Thomas , Suter Andreas , Salman Zaher , Lee Stephen , Heyderman Laura J. 
Published: July 2018

AbstractTwo-dimensional magnetic systems with continuous spin degrees of freedom exhibit a rich spectrum of thermal behaviour due to the strong competition between fluctuations and correlations. When such systems incorporate coupling via the anisotropic dipolar interaction, a discrete symmetry emerges, which can be spontaneously broken leading to a low-temperature ordered phase. However, the experimental realisation of such two-dimensional spin systems in crystalline materials is difficult since the dipolar coupling is usually much weaker than the exchange interaction. Here we realise two-dimensional magnetostatically coupled XY spin systems with nanoscale thermally active magnetic discs placed on square lattices. Using low-energy muon-spin relaxation and soft X-ray scattering, we observe correlated dynamics at the critical temperature and the emergence of static long-range order at low temperatures, which is compatible with theoretical predictions for dipolar-coupled XY spin systems. Furthermore, by modifying the sample design, we demonstrate the possibility to tune the collective magnetic behaviour in thermally active artificial spin systems with continuous degrees of freedom.