bluuebunny/crossref_metadata_2025_split huggingface dataset:
THE CLASSIFICATION OF TRADITIONAL TOOLS IN PAYO RICE FIELDS OF MELAYU JAMBI ETHNIC COMMUNITIES
Authors: Fadilah Nurul , Maulina Rini 
Published: February 2019

Jambi Malay ethnic communities in the province of Jambi have livelihoods as farmers. In farming, they use the ways and tools of traditional. Farm tools of the Jambi Malay ethnic communities are the artifacts that need to be analyzed, scrutinized, and recorded as the corpus of the thinking and creativity of the community ancestor Jambi Malay. The aim of the research is classifying the traditional tools in farming system payo on Jambi Malay ethnic communities. The approach used in this study is the ethnographic and the methods used to obtain data is a research library, observation, and interviews. The research showed that Jambi Malay ethnic community uses traditional farming tools namely Parang Panjang, Kayu Pengait, Pangkur, Keruntung, Ambung, Tajak, Sabit, Kisaran, Nyiru, dan Tikar Rumbai. The Jambi Malay ethnic communities traditional tools classified into two major class i.e cutter (dynamic) and container (static) tools. Classification obtained is expected to motivate the holding of study, research, and comprehensive archiving of traditional agricultural tools of Jambi Malay ethnic communities as part of Indonesian culture artifacts.
AN ANALYSIS OF INTERRUPTION IN SEMINAR SETTING
Authors: Jakob Juvrianto Chrissunday , Pertiwi Sri Ananda 
Published: February 2019

Interruption is a phenomenon when one person takes the turn while another is already talking. Most of the time, phenomena of interruption has been considered as disrespectful act or kind of rude. Contrast, Interruption could be supportive and cooperative act. This study aimed at describing what type of interruption is and reason of doing interruption made by English lectures and students in proposal seminar. This research used qualitative method which the data of interruption are taken from participants in three different proposal seminar conducted by graduate students of UNM by using recording technique. The results showed that types of interruption appeared in seminar are simple interruption, silent interruption, and butting interruption. Otherwise, the reasons of interruption which appears are seeking clarification, correcting, disagreeing, giving clarification, doubting and giving explanation. This is due to the fact that interruptions in this seminar were not violation.
Pemanfaatan Tanaman Sebagai Obat Oleh Masyarakat Desa Karang Dukuh Kecamatan Belawang Kabupaten Barito Kuala
Authors: Lestari Endah , Lagiono Lagiono 
Published: February 2019

Tanaman Obat memiliki ribuan jenis spesies, dari total sekitar 40.000 jenis tumbuhan obat yang telah dikenal di dunia, 30.000-nya disinyalir berada di Indonesia. Jumlah tersebut mewakili 90% dari tanaman obat yang terdapat di wilayah Asia. Tujuan penelitian adalah untuk mengetahui pemanfaatan tanaman sebagai obat oleh masyarakat Desa Karang Dukuh Kecamatan Belawang Kabupaten Barito Kuala yang nanti hasil penelitian ini dapat digunakan sebagai bahan pembelajaran Biologi di Sekolah.
Metode penelitian yang digunakan adalah snowball sampling dengan cara observasi dan wawancara untuk mengetahui jenis tanaman obat yang ada di perkarangan Desa Karang Dukuh. Pengambilan sampel diambil dari hasil wawancara Masyarakat Desa Karang Dukuh. Hasil penelitian menunjukan tanaman obat yang terdapat pada perkarangan Desa Karang Dukuh Kecamatan Belawang Kabupaten Barito Kuala sebanyak 25 jenis yang termasuk kedalam 16 famili. Jenis tanaman yang digunakan adalah Jahe Merah, Janar, Cocor Bebek, lidah Buaya, Kencur, Temulawak, Seledri, Sukun, Sawo, Kembang Sepatu, Kumis Kucing Ciplukan, lamtoro, Kemangi, luntas, Mengkudu, Sirih, Ketepeng Cina, Pacar Air, Patah Tulang, Salam, Kastela, Sambiloto, Rosella, Brotowali, Tetpai masyarakat sering menggunakan tanaman patah tulang, karena mereka sering merasakan sakit gigi, dan caranya memasukan getah patang tulang ke dalam gigi yang berlubang dan jangan sampai terkena gigi yang tidak sakit. Karena tanaman patah tulang sangat mudah untuk didapat.
Male and female English students’ perspectives in English speaking class activities
Authors: Mahmud Adi F , Babikkoi Adamu M. 
Published: February 2019

This research aims to investigate male and female English students’ perspectives in English speaking class activities. This research applied qualitative approach with the descriptive qualitative design. Unstructured interview technique used to collect the data of this study. The researcher interviewed ten participants who consist of five male and five female at English students of Universitas Muhammadiyah Maluku Utara. The participants are from the third semester to the fifth semester who have been joined English speaking class activities. The interview took place at language laboratory for two days. The first day conducted 19th of Augst 2017 with five male students, and the second day in 20th of August 2017 with five female students. In analyzing data, the researcher followed three steps; (1) reading/memoing, (2) describing, and (3) classifying. In the Reading/memoing step, the researcher transcribed all results of the interview from the recorder and read transcription to catch the initial sense of data. The describing step lead the researcher to develop the thorough and comprehensive description of participants, setting, and the phenomenon of the research to cover the rich complexity of the research. In classifying stage, the research made the research data and brooked it down into a smaller unit, put the appropriate unit together in more general and analytic form. Results showed that there are four main perspectives revealed by students (1) language used by a lecturer in English speaking activities, (2) learning approaches, (3) learning strategies, and (4) learning the place. Then, male and female students’ stated similar perspectives, (2) Male and female students’ perspectives do not in line with lecturers perspectives in English speaking class activities.
I-WEIGHTED LACUNARY STATISTICAL tau-CONVERGENCE IN LOCALLY SOLID RIESZ SPACES
Authors: KONCA Şükran , GENÇ Ergin 
Published: February 2019

An ideal $I$ is a family of positive integers $\mathbb{N}$ which is closed under taking finite unions and subsets of its elements. In this paper, we introduce the notions of ideal versions of weighted lacunary statistical $\tau$-convergence, statistical $\tau$-Cauchy, weighted lacunary $\tau$-boundedness of sequences in locally solid Riesz spaces endowed with the topology $\tau$. We also prove some topological results related to these concepts in locally solid Riesz space.
A Near-coplanar Stellar Flyby of the Planet Host Star HD 106906
Authors: De Rosa Robert J. , Kalas Paul 
Published: February 2019

Abstract
We present an investigation into the kinematics of HD 106906 using the newly released Gaia DR2 catalog to search for close encounters with other members of the Scorpius–Centaurus (Sco–Cen) association. HD 106906 is an eccentric spectroscopic binary that hosts both a large asymmetric debris disk extending out to at least 500 au and a directly imaged planetary-mass companion at a projected separation of 738 au. The cause of the asymmetry in the debris disk and the unusually wide separation of the planet is not currently known. Using a combination of Gaia DR2 astrometry and ground-based radial velocities, we explore the hypothesis that a close encounter with another cluster member within the last 15 Myr is responsible for the present configuration of the system. Out of 461 stars analyzed, we identified two candidate perturbers that had a median closest approach distance within 1 pc of HD 106906: HIP 59716 at

pc (

Myr) and HIP 59721 at

pc (

Myr), with the two stars likely forming a wide physical binary. The trajectories of both stars relative to HD 106906 are almost coplanar with the inner disk (Δθ = 5.°4 ± 1.7 and

). These two stars are the best candidates of the currently known members of Sco–Cen for having a dynamically important close encounter with HD 106906, which may have stabilized the orbit of HD 106906 b in the scenario where the planet formed in the inner system and attained high eccentricity by interaction with the central binary.
Cloud Atlas: High-contrast Time-resolved Observations of Planetary-mass Companions
Authors: Zhou Yifan , Apai Dániel , Lew Ben W. P. , Schneider Glenn , Manjavacas Elena , Bedin Luigi R. , Cowan Nicolas B. , Marley Mark S. , Radigan Jacqueline , Karalidi Theodora , Lowrance Patrick J. , Miles-Páez Paulo A. , Metchev Stanimir , Burgasser Adam J. 
Published: February 2019

Abstract
Directly imaged planetary-mass companions offer unique opportunities in atmospheric studies of exoplanets. They share characteristics of both brown dwarfs and transiting exoplanets, and therefore are critical for connecting atmospheric characterizations for these objects. Rotational phase mapping is a powerful technique to constrain the condensate cloud properties in ultra-cool atmospheres. Applying this technique to directly imaged planetary-mass companions will be extremely valuable for constraining cloud models in low mass and surface-gravity atmospheres and for determining the rotation rate and angular momentum of substellar companions. Here, we present Hubble Space Telescope Wide Field Camera 3 near-infrared time-resolved photometry for three planetary-mass companions, AB Pic B, 2M0122B, and 2M1207b. Using two-roll differential imaging and hybrid point-spread function modeling, we achieve sub-percent photometric precision for all three observations. We find tentative modulations (<2σ) for AB Pic B and 2M0122B, but cannot reach conclusive results on 2M1207b due to strong systematics. The relatively low significance of the modulation measurements cannot rule out the hypothesis that these planetary-mass companions have the same vertical cloud structures as brown dwarfs. Our rotation rate measurements, combined with archival period measurements of planetary-mass companions and brown dwarfs, do not support a universal mass-rotation relation. The high precision of our observations and the high occurrence rates of variable low-surface-gravity objects encourage high-contrast time-resolved observations with the James Webb Space Telescope.
The Core Mass Function in the Infrared Dark Cloud G28.37+0.07
Authors: Kong Shuo 
Published: February 2019

Abstract
In this paper, we analyze the 1.3 mm continuum ALMA data that cover the majority of the infrared dark cloud (IRDC) G28.37+0.07. With a spatial resolution of 0.″5 (2500 au at 5 kpc), the continuum image reveals five groups of dense cores. Each core group has a projected physical scale of about 1 pc, with core masses spanning a dynamic range of about 100. We use the dendrogram method (astrodendro) and a newly developed graph method (astrograph) to identify individual cores. The core masses are estimated through the millimeter continuum flux, assuming constant temperature and using an NH3-based gas temperature. We construct core mass functions (CMFs) based on the two methods and fit a power-law relation dN/d log M ∝ M
−α
to the CMFs for M > 0.79 M
⊙. In the constant-temperature scenario, astrograph gives α = 0.80 ± 0.10, while astrodendro gives α = 0.71 ± 0.11, both significantly shallower than the Salpeter-type initial mass function with α = 1.35. In the scenario where the NH3 gas temperature is applied to cores, astrograph gives α = 1.37 ± 0.06, while astrodendro gives α = 0.87 ± 0.07. Regional CMF slope variation is seen between the core groups. We also compare CMFs in three different environments, including IRDC G28.37+0.07, IRDC clumps, and G286.21+0.17, using the identical dendrogram method. Results show that IRDCs have smaller α than the cluster-forming cloud G286.21+0.17.
Relativistic Components of the Ultra-fast Outflow in the Quasar PDS 456 from Chandra/HETGS, NuSTAR, and XMM-Newton Observations
Authors: Boissay-Malaquin Rozenn , Danehkar Ashkbiz , Marshall Herman L. , Nowak Michael A. 
Published: February 2019

Abstract
We present the spectral analysis of Chandra/High Energy Transmission Grating Spectrometer (HETGS) and NuSTAR observations of the quasar PDS 456 from 2015, and XMM-Newton and NuSTAR archival data from 2013 to 2014, together with Chandra/HETGS data from 2003. We analyzed these three different epochs in a consistent way, looking for absorption features corresponding to highly ionized blueshifted absorption lines from H-like and He-like ions of iron (and nickel), as well as of other elements (O, Ne, Si, and S) in the soft band. We confirm the presence of a persistent ultra-fast outflow (UFO) with a velocity of v
out = −0.24 to −0.29 c, that has previously been detected. We also report the detection of an additional faster component of the UFO with a relativistic velocity of v
out = −0.48 c. We implemented photoionization modeling, using XSTAR analytic model warmabs, to characterize the physical properties of the different kinematic components of the UFO and of the partially covering absorber detected in PDS 456. These two relativistic components of the UFO observed in the three epochs analyzed in this paper are powerful enough to impact the host galaxy of PDS 456 through feedback from active galactic nuclei.
Detection of Nonthermal Hard X-Ray Emission from the “Fermi Bubble” in an External Galaxy
Authors: Li Jiang-Tao , Hodges-Kluck Edmund , Stein Yelena , Bregman Joel N. , Irwin Judith A. , Dettmar Ralf-Jürgen 
Published: February 2019

Abstract
We report new Chandra hard X-ray (>2 keV) and Jansky Very Large Array C-band observations of the nuclear superbubble of NGC 3079, an analog of the “Fermi bubble” in our Milky Way. We detect extended hard X-ray emission on the southwest (SW) side of the galactic nucleus with coherent multiwavelength features in radio, Hα, and soft X-ray. The hard X-ray feature has a cone shape with possibly a weak cap, forming a bubble-like structure with a diameter of ∼1.1 kpc. A similar extended feature, however, is not detected on the northeast (NE) side, which is brighter in all other wavelengths such as radio, Hα, and soft X-ray. Scattered photons from the nuclear region or other nearby point-like X-ray bright sources, inverse Compton emission from cosmic-ray (CR) electrons via interaction with the cosmic microwave background, or any individually faint stellar X-ray source populations, cannot explain the extended hard X-ray emission on the SW side and the strongly NE/SW asymmetry. A synchrotron emission model, plus a thermal component accounting for the excess at ∼1 keV, can well characterize the broadband radio/hard X-ray spectra. The broadband synchrotron spectra do not show any significant cutoff, and even possibly slightly flatten at higher energy. This rules out a loss-limited scenario in the acceleration of the CR electrons in or around this superbubble. As the first detection of kiloparsec-scale extended hard X-ray emission associated with a galactic nuclear superbubble, the spatial and spectral properties of the multiwavelength emissions indicate that the CR leptons responsible for the broadband synchrotron emission from the SW bubble must be accelerated in situ, instead of transported from the nuclear region of the galaxy.
LOFAR Observations of 4C+19.44: On the Discovery of Low-frequency Spectral Curvature in Relativistic Jet Knots
Authors: Harris D. E. , Moldón J. , Oonk J. R. R. , Massaro F. , Paggi A. , Deller A. , Godfrey L. , Morganti R. , Jorstad S. G. 
Published: February 2019

Abstract
We present the first LOFAR observations of the radio jet in the quasar 4C+19.44 (a.k.a. PKS 1354+19) obtained with long baselines. The achieved resolution is very well matched to that of archival Jansky Very Large Array observations at higher radio frequencies as well as the archival X-ray images obtained with Chandra. We found that, for several knots along the jet, the radio flux densities measured at hundreds of MHz lie well below the values estimated by extrapolating the GHz spectra. This clearly indicates the presence of spectral curvature. Radio spectral curvature has already been observed in different source classes and/or extended radio structures, and it has been often interpreted as due to intrinsic processes, as a curved particle energy distribution, rather than absorption mechanisms (Razin–Tsytovich effect, free–free or synchrotron self absorption to name a few). Here, we discuss our results according to the scenario where particles undergo stochastic acceleration mechanisms also in quasar jet knots.
A Method for Weak Pulsar Signal Detection Combining the Bispectrum and a Deep Convolutional Neural Network
Authors: Wang Longqi , Jin Jing , Jiang Yu , Shen Yi 
Published: February 2019

Abstract
Traditional pulsar signal detection technology based on a fast Fourier transform (FFT) spectrum search and epoch folding requires a very long time to obtain an appropriate net signal-to-noise gain, especially for weak pulsar signals with low photon fluxes. We utilize a high-order spectrum with a nonuniform sampling strategy and an extra denoising process, including a high-pass filter and autocorrelation, to suppress the noise to a great extent. Because of the advantages of the deep convolutional neural network in two-dimensional data mining, the pulsar detection task is accurately realized, while the expert’s subjective experience and the formal theory are avoided. The Rossi X-ray Timing Explorer data from three pulsars, PSR B0531+21, PSR B0540−69, and PSR B1509−58, are selected for the experiment, and the identification task is realized with a classification accuracy greater than 90%, with observation times of only 0.5 s, 40 s, and 15 s, respectively. Traditional methods have difficulty accomplishing the identification task within the same observation time. Further experiments reveal that the high-pass filter and autocorrelation can effectively suppress the cosmic background and random noise and that the nonuniform sampling of the bispectrum can avoid frequency leakage. Although the time complexity (O(N
2)) of the algorithm is higher than those of the traditional FFT (O(N log N)) methods, the algorithm reduces the requirement of the observation duration time; thus, the computational complexity is comparable to that of traditional methods.
Tracing Magnetic Field Morphology Using the Velocity Gradient Technique in the Presence of CO Self-absorption
Authors: Hsieh Cheng-han , Hu Yue , Lai Shih-Ping , Yuen Ka Ho , Liu Sheng-Yuan , Hsieh I-Ta , Ho Ka Wai , Lazarian A. 
Published: February 2019

Abstract
Probing magnetic fields in self-gravitating molecular clouds is generally difficult, even with the use of polarimetry. Based on the properties of magnetohydrodynamic turbulence and turbulent reconnection, the velocity gradient technique (VGT) provides a new way of tracing magnetic field orientation and strength based on spectroscopic data. Our study tests the applicability of VGT in various molecular tracers, e.g., 12CO, 13CO, and C18O. By inspecting synthetic molecular-line maps of CO isotopologs generated through radiative transfer calculations, we show that the VGT can be successfully applied in probing the magnetic field direction in the diffuse interstellar medium, as well as in self-gravitating molecular clouds.
Discovery of Resolved Magnetically Split Lines in SDSS/APOGEE Spectra of 157 Ap/Bp Stars
Authors: Chojnowski S. Drew , Hubrig Swetlana , Hasselquist Sten , Castelli Fiorella , Whelan David G. , Majewski Steven R. , Nitschelm Christian , García-Hernández D. A. , Stassun Keivan G. , Zamora Olga 
Published: February 2019

Abstract
We report on magnetic field measurements of 157 chemically peculiar A/B stars (Ap/Bp) based on resolved, magnetically split absorption lines present in H-band spectra provided by the Sloan Digital Sky Survey (SDSS)/Apache Point Observatory Galactic Evolution Experiment (APOGEE) survey. These stars represent the extreme magnetic end of a still-growing sample of >900 Ap/Bp stars selected among the APOGEE telluric standard stars as those with Ce iii absorption lines and/or literature Ap/Bp classifications. The lines most frequently resolved into their split components for these stars in the H-band pertain primarily pertain to Ce iii, Cr ii, Fe i, Mn ii, Si i, and Ca ii, in addition to one or more unidentified ions. Using mean magnetic field modulus (

) estimates for transitions with known Landé factors, we estimate effective Landé factors for 5 Ce iii lines and 15 unknown lines and proceed to measure

of 157 stars, only 3 of which have previous literature estimates of

. This 183% increase in the number of Ap/Bp stars for which

has been measured is a result of the large number of stars observed by SDSS/APOGEE, extension of high-resolution Ap/Bp star observations to fainter magnitudes, and the advantages of long wavelengths for resolving magnetically split lines. With

∼ 25 kG, the star 2MASS J02563098+4534239 is currently the most magnetic star of the SDSS/APOGEE sample. Effective Landé factors, representative line profiles, and magnetic field moduli are presented. The validity of the results is supported using optical, high-resolution, follow-up spectra for 29 of the stars.
Pooled analysis of 1270 infective endocarditis cases in Turkey
Authors: Vahabi Arman , Gül Funda , Garakhanova Sabina , Sipahi Hilal , Sipahi Oğuz Reşat 
Published: February 2019

Introduction: Despite developments in medicine, infective endocarditis (IE) is still associated with significant morbidity and mortality. In this study it was aimed to systematically review the infective endocarditis literature published or presented from Turkey.
Methods: To find the published series, one national database (Ulakbim), and three international databases (Scopus, Pubmed and Sci-e) were searched between 31 October-3 November 2014. also, abstracts of congresses by three national congresses were searched for studies regarding infective endocarditis.
Results: Data for 1270 patients (38.3% female, mean age 46.2, 28% prosthetic valve endocarditis) with a diagnosis of infective endocarditis were obtained from 21 reports (18 published articles and three congress abstracts). Of the 18 articles, four were in peer-reviewed medical journals indexed in national databases and 14 were in international databases. There was an underlying heart disease in 51.9% and history of dental procedure was 6.7%. Fever, heart murmur and fatigue were present in 94%, 71.4% and 69% respectively. most commonly involved site was mitral valve (43.3%), followed by aortic (33.8%) and tricuspid valve (6.4%). Staphylococcus aureus, coagulase-negative staphylococci and enterococci comprised the 22.8%, 9.7% and 7.5% of the cases while 31.1% were culture-negative. Overall mortality was 23.4%. When we compared series related to years 2008 and before and 2009 and after, the mortality rates were (24.1%-224/931) vs (20.1%-32/159), respectively (p = 0,31).
Conclusion: Infective endocarditis is still associated with significant mortality. S. aureus seems to be the most common etiologic agent. There was a slight decrease in the recent years in mortality.