bluuebunny/crossref_metadata_2025 huggingface dataset:
The Sixth Data Release of the Radial Velocity Experiment (Rave). II. Stellar Atmospheric Parameters, Chemical Abundances, and Distances
Authors: Steinmetz Matthias , Guiglion Guillaume , McMillan Paul J. , Matijevič Gal , Enke Harry , Kordopatis Georges , Zwitter Tomaž , Valentini Marica , Chiappini Cristina , Casagrande Luca , Wojno Jennifer , Anguiano Borja , Bienaymé Olivier , Bijaoui Albert , Binney James , Burton Donna , Cass Paul , de Laverny Patrick , Fiegert Kristin , Freeman Kenneth , Fulbright Jon P. , Gibson Brad K. , Gilmore Gerard , Grebel Eva K. , Helmi Amina , Kunder Andrea , Munari Ulisse , Navarro Julio F. , Parker Quentin , Ruchti Gregory R. , Recio-Blanco Alejandra , Reid Warren , Seabroke George M. , Siviero Alessandro , Siebert Arnaud , Stupar Milorad , Watson Fred , Williams Mary E. K. , Wyse Rosemary F. G. , Anders Friedrich , Antoja Teresa , Birko Danijela , Bland-Hawthorn Joss , Bossini Diego , García Rafael A. , Carrillo Ismael , Chaplin William J. , Elsworth Yvonne , Famaey Benoit , Gerhard Ortwin , Jofre Paula , Just Andreas , Mathur Savita , Miglio Andrea , Minchev Ivan , Monari Giacomo , Mosser Benoit , Ritter Andreas , Rodrigues Thaise S. , Scholz Ralf-Dieter , Sharma Sanjib , Sysoliatina Kseniia ,   (The Rave collaboration)
Published: July 2020

We present part 2 of the sixth and final Data Release (DR6) of the Radial Velocity Experiment (Rave), a magnitude-limited (

) spectroscopic survey of Galactic stars randomly selected in Earth’s southern hemisphere. The Rave medium-resolution spectra (R ∼ 7500) cover the Ca triplet region (8410–8795 Å) and span the complete time frame from the start of Rave observations on 2003 April 12 to their completion on 2013 April 4. In the second of two publications, we present the data products derived from 518,387 observations of 451,783 unique stars using a suite of advanced reduction pipelines focusing on stellar atmospheric parameters, in particular purely spectroscopically derived stellar atmospheric parameters (

,

, and the overall metallicity), enhanced stellar atmospheric parameters inferred via a Bayesian pipeline using Gaia DR2 astrometric priors, and asteroseismically calibrated stellar atmospheric parameters for giant stars based on asteroseismic observations for 699 K2 stars. In addition, we provide abundances of the elements Fe, Al, and Ni, as well as an overall [α/Fe] ratio obtained using a new pipeline based on the GAUGUIN optimization method that is able to deal with variable signal-to-noise ratios. The Rave DR6 catalogs are cross-matched with relevant astrometric and photometric catalogs, and are complemented by orbital parameters and effective temperatures based on the infrared flux method. The data can be accessed via the Rave website (http://rave-survey.org) or the Vizier database.
On the Accuracy of Time-delay Cosmography in the Frontier Fields Cluster MACS J1149.5+2223 with Supernova Refsdal
Authors: Grillo C. , Rosati P. , Suyu S. H. , Caminha G. B. , Mercurio A. , Halkola A.
Published: July 2020

We study possible systematic effects on the values of the cosmological parameters measured through strong lensing analyses of the Hubble Frontier Field galaxy cluster MACS J1149.5+2223. We use the observed positions of a large set of spectroscopically selected multiple images, including those of supernova “Refsdal” with their published time delays. Starting from our reference model in a flat ΛCDM cosmology, published in Grillo et al. (2018), we confirm the relevance of the longest measurable time delay, between SX and S1, and an approximately linear relation between its value and that of H
0. We perform true blind tests by considering a range of time delays around its original estimate of 345 ± 10 days, as an accurate measurement of this time delay is still not known at the time of analysis and writing. We investigate separately the impact of a constant sheet of mass at the cluster redshift, of a power-law profile for the mass density of the cluster main halo and of some scatter in the cluster member scaling relations. Remarkably, we find that these systematic effects do not introduce a significant bias on the inferred values of H
0 and Ωm and that the statistical uncertainties dominate the total error budget: a 3% uncertainty on the time delay of image SX translates into approximately 6% and 40% (including both statistical and systematic 1σ) uncertainties for H
0 and Ωm, respectively. Furthermore, our model accurately reproduces the extended surface brightness distribution of the supernova host. We also present the interesting possibility of measuring the value of the equation-of-state parameter w of the dark energy density, currently with a 30% uncertainty.
The Black Hole Mass–Color Relations for Early- and Late-type Galaxies: Red and Blue Sequences
Authors: Dullo Bililign T. , Bouquin Alexandre Y. K. , de Paz Armando Gil , Knapen Johan H. , Gorgas Javier
Published: July 2020

The tight correlations between supermassive black hole (SMBH) mass (M
BH) and the properties of the host galaxy have useful implications for our understanding of the growth of SMBHs and of the evolution of galaxies. Here, we present newly observed correlations between M
BH and the host galaxy total UV−[3.6] color (

, Pearson's r = 0.6–0.7) for a sample of 67 galaxies (20 early-type galaxies and 47 late-type galaxies) with directly measured M
BH in the Galaxy Evolution Explorer/S4G survey. The colors are carefully measured in a homogeneous manner using the far-UV, near-UV, and 3.6 μm magnitudes of the galaxies and their multicomponent structural decompositions in the literature. We find that more massive SMBHs are hosted by (early- and late-type) galaxies with redder colors, but the

relations for the two morphological types have slopes that differ at ∼2σ level. Early-type galaxies define a red sequence in the

diagrams, while late-type galaxies trace a blue sequence. Within the assumption that the specific star formation rate of a galaxy (sSFR) is well traced by L
UV/L
3.6, it follows that the SMBH masses for late-type galaxies exhibit a steeper dependence on sSFR than those for early-type galaxies. The

and M
BH − L
3.6,tot relations for the sample galaxies reveal a comparable level of vertical scatter in the log M
BH direction, approximately 5%–27% more than the vertical scatter of the M
BH − σ relation. Our

relations suggest different channels of SMBH growth for early- and late-type galaxies, consistent with their distinct formation and evolution scenarios. These new relations offer the prospect of estimating SMBH masses reliably using the galaxy color alone. Furthermore, we show that they are capable of estimating intermediate black hole masses in low-mass early- and late-type galaxies.
INTEGRAL Discovery of a Burst with Associated Radio Emission from the Magnetar SGR 1935+2154
Authors: Mereghetti S. , Savchenko V. , Ferrigno C. , Götz D. , Rigoselli M. , Tiengo A. , Bazzano A. , Bozzo E. , Coleiro A. , Courvoisier T. J.-L. , Doyle M. , Goldwurm A. , Hanlon L. , Jourdain E. , Kienlin A. von , Lutovinov A. , Martin-Carrillo A. , Molkov S. , Natalucci L. , Onori F. , Panessa F. , Rodi J. , Rodriguez J. , Sánchez-Fernández C. , Sunyaev R. , Ubertini P.
Published: July 2020

We report on International Gamma-Ray Astrophysics Laboratory (INTEGRAL) observations of the soft γ-ray repeater SGR 1935+2154 performed between 2020 April 28 and May 3. Several short bursts with fluence of

erg cm−2 were detected by the Imager on-board INTEGRAL (IBIS) instrument in the 20–200 keV range. The burst with the hardest spectrum, discovered and localized in real time by the INTEGRAL Burst Alert System, was spatially and temporally coincident with a short and very bright radio burst detected by the Canadian Hydrogen Intensity Mapping Experiment (CHIME) and Survey for Transient Astronomical Radio Emission 2 (STARE2) radio telescopes at 400–800 MHz and 1.4 GHz, respectively. Its lightcurve shows three narrow peaks separated by ∼29 ms time intervals, superimposed on a broad pulse lasting ∼0.6 s. The brightest peak had a delay of 6.5 ± 1.0 ms with respect to the 1.4 GHz radio pulse (that coincides with the second and brightest component seen at lower frequencies). The burst spectrum, an exponentially cutoff power law with photon index

and peak energy

, is harder than those of the bursts usually observed from this and other magnetars. By the analysis of an expanding dust-scattering ring seen in X-rays with the Neil Gehrels Swift Observatory X-ray Telescope (XRT) instrument, we derived a distance of

kpc for SGR 1935+2154, independent of its possible association with the supernova remnant G57.2+0.8. At this distance, the burst 20–200 keV fluence of

erg cm−2 corresponds to an isotropic emitted energy of

erg. This is the first burst with a radio counterpart observed from a soft γ-ray repeater and it strongly supports models based on magnetars that have been proposed for extragalactic fast radio bursts.
Foundational Practices of Research Data Management
Authors: Briney Kristin , Coates Heather , Goben Abigail
Published: July 2020

The importance of research data has grown as researchers across disciplines seek to ensure reproducibility, facilitate data reuse, and acknowledge data as a valuable scholarly commodity. Researchers are under increasing pressure to share their data for validation and reuse. Adopting good data management practices allows researchers to efficiently locate their data, understand it, and use it throughout all of the stages of a project and in the future. Additionally, good data management can streamline data analysis, visualization, and reporting, thus making publication less stressful and time-consuming. By implementing foundational practices of data management, researchers set themselves up for success by formalizing processes and reducing common errors in data handling, which can free up more time for research. This paper provides an introduction to best practices for managing all types of data.
Two new Geranomyia Haliday (Diptera, Limoniidae) crane flies from Mount Jiulong in China, with an updated key to Chinese species
Authors: Qian Xingyang , Zhang Xiao
Published: July 2020

The genus Geranomyia Haliday, 1833 is globally distributed, with 351 known species, of which 26 occur in China. Herein, an overview of the genus Geranomyia from Mount Jiulong, Zhejiang, China, is presented. Two new species are described and illustrated. Geranomyia jiulongensissp. nov. and G. subablusasp. nov. are distinguished from other Geranomyia species by the characters of the thorax and male genitalia. An updated key to the Geranomyia of China is presented.
The Communist Party of Cyprus, the Comintern and the uprising of 1931: thoughts on the 'apologia' of Charalambos Vatyliotis (Vatis)
Authors: Choumerianos Manolis , Sakellaropoulos Spyros
Published: July 2020

Drawing on primary material from the Soviet archives, this article considers the attitude of the Communist Party of Cyprus (CPC) to the failed revolt of 1931 against British colonialism. The CPC's contradictions and shortcomings are exposed through outlining the course of the revolt,
along with a presentation of the Comintern's position on these events. The argument put forward is that there were a number of more general problems facing the Comintern at this time that paved the way for the CPC's pursuit of this specific contradictory line. Among these general problems
were the failure to achieve a further revolutionary breakthrough in Europe, the rise of fascism and the characteristics of the anti-colonial struggles of that time.
Pressure, temperature and processing time in enhancing Camelina sativa oil extraction by Instant Controlled Pressure-Drop (DIC) texturing pre-treatment
Authors: Bouallegue K. , Allaf T. , Ben Younes R. , Téllez-Pérez C. , Besombes C. , Allaf K.
Published: July 2020

Instant Controlled Pressure Drop (DIC) was evaluated as a texturing pre-treatment for the extraction of Camelina sativa (L.) oil. DIC was coupled to Accelerated Solvent Extraction (ASE), Pressing and Dynamic Maceration (DM). DIC optimization was performed by studying the effects of pressure, temperature and processing time on oil yield. DIC + ASE obtained seed-oil yields of 615.9±0.5 against 555.5±0.5 g oil/kg-ddb for untextured seeds (RM). Via pressing, oil yields were 490.9±0.5 and 444.7±0.5 g oil/kg-ddb for textured and untextured seeds, respectively. Through coupling DIC (P: 0.63 MPa and t: 105 s) to the pressing extraction (60 s) of seeds along with 2h of DM of meals, it was possible to reach 605.8 g oil/kg ddb of oil yield. The same results were not obtained for RM seeds, where after 24 h of DM extraction, the oil yield was 554.7 g oil/kg ddb. DIC allowed for an increase in Camelina oil yields, reduced extraction time and valorized pressing meals.
« Il n’y a plus d’artiste ici ! »
Authors: Zevaco Ariane
Published: July 2020

De l’ambition soviétique de « professionnalisation » artistique aux théories et orchestrations musicales actuelles, l’académisme est le maître mot de l’institutionnalisation musicale étatique au Tadjikistan. Pourtant, les cadres des exécutions musicales dans ces lieux ne sont pas uniquement organisés selon les exigences étatiques. En effet, les musiciens négocient leurs enseignements et leurs interprétations selon leurs visions des musiques, et selon les objectifs sociaux et politiques de ces contextes. En outre, les organisations non étatiques, les fêtes rituelles et les concerts privés constituent autant d’institutions où s’affirme différemment l’autorité des savoirs. Au gré des enjeux portés par ces différents lieux, comment les musiciens participent-ils aux processus institutionnels, s’y opposent-ils, ou en jouent-ils pour consolider leur position ? Les procédures des savoirs mises en œuvre par les acteurs de ces mondes musicaux montrent comment ces institutions de savoir se fabriquent à travers des rapports de pouvoir, ainsi que les efforts des musiciens pour façonner à leur idée l’autorité artistique et pédagogique qu’ils y exercent.
Kuhn dans la « révolution cognitive »
Authors: Massot Arthur
Published: July 2020

En 1962 paraissait La Structure des révolutions scientifiques, l'ouvrage qui a rendu célèbre l'historien des sciences Thomas Kuhn. À partir de 1970, cet ouvrage a fait l'objet d'un accueil à la fois vaste et controversé au sein de la psychologie états-unienne. Dans cet article, nous revenons sur les enjeux historiques et épistémologiques de ces controverses. Ce sont en particulier les défenseurs de la psychologie cognitive naissante qui ont mobilisé la théorie kuhnienne dans le but d'imposer leur orientation contre le béhaviorisme, qui dominait alors la psychologie états-unienne. Plusieurs caractéristiques associées au modèle de Kuhn ont favorisé l'imposition du cognitivisme en psychologie : sa vision internaliste, discontinuiste, monopolistique et universaliste de la science, l'ambiguïté de ses formulations, l'autorité dont Kuhn jouissait dans les années 1970, et enfin, la répétition des énoncés proclamant la survenue d'une « révolution cognitive » en psychologie.
Produire des savoirs « africains »
Authors: Zevounou Lionel
Published: July 2020

Les communautés intellectuelles africaines restent souvent méconnues dans le monde universitaire français. Le présent article se penche sur le cas du CODESRIA (Conseil pour la recherche en sciences sociales en Afrique) dont la connaissance demeure confinée aux cercles des « africanistes ». Une telle méconnaissance contraste avec la reconnaissance accordée, dans le Nord, à certains des travaux individuels des universitaires provenant du même espace géographique. Ces dynamiques contrastées de reconnaissance renvoient à la figure fantasmée de l'« intellectuel mondialisé » provenant du Sud  et font l’impasse sur les communautés intellectuelles dans lesquelles s’inscrivent ou se sont inscrits à un moment donné la trajectoire des acteurs concernés. Appréhender les penseurs « africains » plutôt que les communautés intellectuelles dans lesquelles ils s’inscrivent ou ont évolué jette un voile pudique sur des débats initiés dans leurs communautés de provenance. Dans cette perspective, le présent article propose un aperçu d’une institution, le CODESRIA, acteur de cette communauté intellectuelle, et discute la manière dont la question de la décolonisation des savoirs y a été abordée, en prenant le cas de sa dernière assemblée générale.
Les enjeux de l’institutionnalisation des savoirs musicaux
Authors: Le Gargasson Ingrid
Published: July 2020

Les institutions musicales modernes ont participé à la pérennisation et au renouvellement de certaines pratiques musicales et favorisé, plus largement, la création artistique. Leur prolifération et leur rôle déterminant dans l’histoire récente d’un grand nombre de traditions musicales invitent à une réflexion anthropologique transversale. Le processus d’institutionnalisation engendre un ensemble de transformations qui affectent directement les savoirs musicaux : il participe à la redéfinition de l’espace social et géographique d’un genre ou d’un répertoire. En s’attachant au cheminement d’une pratique circonscrite ou d’une catégorie musicale, les auteurs de ce dossier témoignent de la multiplicité des contextes musicaux et de l’inscription des institutions dans différentes échelles temporelles et territoriales. Ils soulignent, en parallèle, la capacité d’action des acteurs face à la coexistence et la superposition d’institutions socio-musicales. Alors que le cadre institutionnel délimite un espace de performance au statut oscillant dans le temps et dans le champ musical, les dynamiques engendrées par l’interpénétration des différents modèles de socialisations musicales dessinent un paysage musical complexe aux frontières mouvantes.
Los desafíos de la institucionalización musical
Authors: Le Gargasson Ingrid
Published: July 2020

Las instituciones musicales modernas han participado en la perpetuación y la renovación de ciertas prácticas musicales y, más ampliamente, han favorecido la creación artística. Su proliferación y su función decisiva en la historia reciente de muchas tradiciones musicales invitan a una reflexión antropológica transversal. La institucionalización genera un conjunto de procesos que afectan directamente la música y participa en la redefinición del espacio social y geográfico de una práctica o de un repertorio. Al centrarse en el transcurso de una práctica circunscrita o de una categoría musical, los autores de este número dan testimonio de la multiplicidad de los contextos musicales y de la inclusión de las instituciones a diferentes niveles temporales y territoriales. los autores subrayan igualmente la capacidad de acción de los actores frente a la coexistencia y a la superposición de las instituciones socio-musicales. Si bien el contexto institucional delimita un espacio de acción que oscila con el tiempo y en el campo musical, las dinámicas generadas por la interpenetración de diferentes modelos de socializaciones musicales dibujan un panorama musical complejo con fronteras movedizas.
Early Characterization of NdFeB and NdFeB /Co-Al Composites of Sintering Using SPS
Authors: Mustofa Salim , Purwanto Setyo , Sumaryo  , Sugeng Bambang , Sudiro Toto , Hermanto Bambang , Sudrajat Nanang
Published: July 2020

The purpose of this study is to obtain a permanent magnet end-product from NdFeB and NdFeB / Co-Al composite material from SPS sintering which has high density with small grain size and strong corrosion resistance. NdFeB powder and NdFeB/Co-Al composites (0.2 and 0.5weight%) of several micron-sized particles resulting from the milling process have been successfully sintered with a temperature parameter of 800°C for 10 minutes and a pressure of 50MPa in dies with a diameter of 20 mm in a vacuum chamber. Optical micrographs show that the grains are uniformly and smoothly distributed throughout the surface. This is showing the types of grain distributions which has good mechanical properties. The X-ray analysis result shows the phase analysis confirms the presence of such main PM phases as Nd, Fe and B. From SEM observation, the particles have irregular shapes and a large particle size distribution. The density value of the sample is in the range of 7.1 - 7.3. From the density measurement it is also known that the sintering sample with SPS has a high-density level which is close to 100%, so it can be said that it has formed fully dense.
Analysis Microstructure of La0.7(Sr1-xCax)0.3MnO3 Prepared by Sol-Gel Method
Authors: Saptari Sitti Ahmiatri , Putra Redho Aulia , Tjahjono Arif , Azhar Anugrah , Rahman Ikhwan Nur
Published: July 2020

Perovskite-based on manganite La0.7(Sr1-xCax)0.3MnO3 (x = 0, 0.3, 0.5, 0.7) has been successfully synthesized using by sol-gel method. All sample was characterized by using XRD (X-Ray Diffraction) obtain a single phase without impurities peak. The transition of crystal structure transition, lattice parameters, cell unit volume, crystal size, bond length (Mn-O), and  bond angles caused by Ca2+ ion substitution. Dopant concentration x = 0 - 0.5 shows that the sample has a rhombohedral crystal structure with space group R-3c and orthorhombic crystal structure with space group P n m a at dopant concentration x = 0.7. The results of SEM (Scanning Electron Microscope) characterization show a difference in grain size with the addition of Ca2+ ion substitution.
Effect of Light Intensity on Magnetic Properties of SrTiO3 Thin- Films
Authors: Bintari Putri Lailatul , Rahmawaty Vania , Palupi Endah Kinarya , Patonah Nazopatul , Irmansyah  , Sumaryada Tony , Irzaman
Published: July 2020

We have grown a SrTiO3 thin film from strontium acetate and titanium isopropoxide using chemical solution deposition (CSD) method using a spin coater, and furnace annealed with a temperature of 850°C for 8 hours. We have assessed the thin-film frequency, magnetic field, and electric charges using LCR meter and light intensities of 0 (dark), 4000, 8000, 12000 lux. From the data of LCR meter, it can be measured and see the relationship between the current and the angular velocity will be decreased. Also, the results of the measurements obtained the relationship between magnetic fields and angular velocity is reduced as well. Therefore, we can be assumed the higher the intensity of light shall lower the magnetic properties.
The Effect of Silica on Photocatalytic Degradation of Methylene Blue Using Silica-Coated NiZn Ferrite Nanoparticles
Authors: Istiqomah Nurul Imani , Muzakki Afifah Thahirah , Nofrianti Astrie , Suharyadi Edi , Kato Takeshi , Iwata Satoshi
Published: July 2020

Nickle zinc ferrite (NiZnFe2O4) magnetic nanoparticle (MNPs) has been successfully synthesized using co-precipitation method. NiZnFe2O4 was coated SiO2 (NiZnFe2O4/SiO2) using Stöber method with various concentrations of (5%, 10%, 15%, 20%, 30%, and 50%). MNPs sample has a spinel ferrite phase confirmed by X-ray diffraction (XRD) measurements. The results of the functional group analysis performed using Fourier transform infrared (FTIR) showed an M-O tetrahedral vibrational bond found a wavelength of 347 cm-1. After coated silica, Si-O-Si vibrational bonds appear at wavelengths of 1033.85 cm1. Magnetic properties were measured using vibrating Sample Magnetometer (VSM), the result shows that has maximum saturation magnetization of NiZnFe2O4 22.5 emu.gram-1 and decreased to 16.9 emu.gram-1 after coating. In figure 1 show that the photodegradation activity of MNPs was carried out with a variation of irradiation time. Result of the photodegradation activity of methylene blue shows that NiZnFe2O4/SiO2 are higher than NiZnFe2O4. Sample of NiZnFe2O4/SiO2 has the highest photodegradation rate up to 96%. The existence of SiO2 layer on the surface of bare MNPs increases the surface reactivity of samples.
Microwave Response of Gd-Doped YIG Based Y-Junction Stripline Circulator for Use at Very High Frequencies
Authors: Subawi Handoko , Soepriyanto Syoni
Published: July 2020

This study aimed to evaluate Fe2O3 based magnetic ferrite performance and its composition using Rare Earth Oxide (REO) of Yttrium as dopant and Gadolinium as co-dopant elements. Lot of specimens were prepared through dry pressing technique, and sintered into the high temperature tube furnace up to 1450°C. Sintering duration of 5 hours results the best magnetic properties. The existence of Gadolinium element tends to improve magnetic properties of magnetic ferrite Gd-doped YIG structure. Remacomp brand Magnet-Physik was used to determine the characteristics of soft magnetic materials in the measurement frequency range of 10 Hz to 70 kHz. Microwave response was measured using the Vector Network Analysis to provide insertion loss and isolation data. The obtained insertion loss of Gd0.75Y2.25Fe5O12 is 0.4270 dB (at 3.7 GHz) and 0.2455 dB (at 4.2 GHz), while the isolation value is 11.3840 dB (at 3.7 GHz) and 17.8250 dB (at 4.2 GHz). The further experiment will be carried out to improve the microwave response and better magnetic properties of Gd-doped YIG structure.
Microwave Absorption Characteristic of ZnNd(x)Fe(2-x)O4 System
Authors: Mashadi  , Ajiesastra Andhika , Yunasfi
Published: July 2020

The ZnNd(x)Fe(2-x)O4 (x = 0.0; 0.010; 0.020 and 0,030) systems were synthesized by solid reaction method from a mixture of ZnO2, Fe2O3 and Nd2O3 powders according to their mole ratio using mechanical milling techniques. In this mixture was added ethanol of 25 ml and then milled for 5 hours, after that sintered at a temperature of 1000 °C for 5 hours. X-ray diffraction patterns showed that the Nd3+ ion substitution in ZnFe2O4 with the concentration of x = 0.0 to 0.02 did not result in changes in ZnFe2O4 phase with cubic structure (space group of Fd-3m). However, the composition of x = 0.030 formed multiphases ZnFe2O4 and NdFeO3 phases. The morphological observation using Scanning Electron Microscope (SEM) showed spherical and uniform particles. Whereas the microwave absorption capability of the sample ZnNd(x)Fe(2-x)O4 system increased with the increasing concentration of x from 91.20% up to 97.80% with the highest absorption is found at a frequency of 10.24 GHz. The dielectric loss of this study is very small around 0.005 up to 0.05. It is hoped that the compound ZnNd0.02Fe1,98O4 can be applied to microwave absorbing agents at high frequencies (X-band range) in antiradar detection systems.
Studying the Effect of Praseodymium Pr Substituted Nd2Fe14B Alloys on its Magnetic Anisotropic Properties Prepared by Arc Melting
Authors: Adi Wisnu Ari , Yunasfi  , Madesa Tria , Winatapura Didin Sahidin , Sarwanto Yosef , Mashadi  , Purwanto Setyo
Published: July 2020

Nd2Fe14B permanent magnet manufacturing technology in some developing countries is still relatively difficult because it is constrained by limited equipment facilities and dependence on imports of raw materials. In the context of efforts to build national independence, the concrete step is to try to study the process of making permanent Nd2Fe14B magnets with conventional facilities and technology. In this research an attempt was made to make and characterize Nd2Fe14B permanent magnets substituted with praseodymium Pr metal using conventional technology through the arc melting method. The success parameter of the results of this sample making is the formation of the Nd2Fe14B phase in the sample. The formation of this phase can be fundamentally studied the number of mass fractions of formed phases and structure crystallography using X-ray diffraction facilities and is supported by spectroscopy facilities and their magnetic properties. So the purpose of this research in general is to study the manufacturing process and the fundamental formation of the phases of the NdPrFe14B sample making through the arc melting method, while specifically wanting to know the relationship between phase analysis and the magnetic anisotropic properties of NdPrFe14B. The coercivity field appears to increase significantly after the sample is substituted with Pr and has a fairly small crystallite size distribution. So it was concluded that the presence of Pr was able to withstand the growth of grain, causing the anisotropic magnetocrystalline field to increase.
Annealing Temperature Effects in Co-Precipitated CoFe2O4 Nanoparticles Using Bengawan Solo River Fine Sediment
Authors: Mubarok Ahmad Thabib , Widiyandari Hendri , Utari  , Purnama Budi
Published: July 2020

In this study, the synthesis of CoFe2O4 by using the fine sediment of the Bengawan Solo River, Trucuk District, Bodjonegoro Regency as raw materials with the coprecipitation method has been successfully carried out. The fine sediment is used as a source of Fe cation in the synthesis of CoFe2O4. The XRD confirmation results showed that CoFe2O4 is formed at an annealing temperature of 800° C with crystallite sizes ranging from 34.88 to 38.05 nm. Thus, the VSM characterization showed that the magnetic properties of the CoFe2O4 nanoparticles depend on the heat treatment of the fine sediments as ore materials. Finally, the obtained CoFe2O4 samples can be used as photocatalysts with a maximum reduction rate ratio of 83%.
Effect of Hard Magnetic CoFe2O4 Nanoparticles Additives on Improving Rheological Properties and Dispersion Stability of Magnetorheological Fluids
Authors: Nugroho Kacuk Cikal , Sarifuddin Wahid Sidik , Purnama Budi , Ubaidillah  , Nordin Nur Azmah , Bin Mazlan Saiful Amri
Published: July 2020

Increasing dispersion stability is the main issue in recent research at magnetorheological (MR) fluids. The presentation of nanoparticle addictive in MR fluids is an effective method not only to increase dispersion stability but also increasing performance in MR fluids. In this study, the effect of hard magnetic CoFe2O4 nanoparticles addition on rheological properties and dispersion stabilization had been studied. Rheological properties were investigated using a rheometer at room temperature. The result showed that the addition of CoFe2O4 nanoparticles 1wt% in particles of MR fluids were improving the shear stress and viscosity of MR fluids. Both MR fluids with and without nanoadditives behaving like a Newtonian fluid at the off-state condition and act like Bingham fluid at the on-state condition. Moreover, MR fluid with CoFe2O4 additives had a higher sedimentation ratio than MR fluids without additives.
Effects of NaOH Concentration and Temperature on Microstructures and Magnetic Properties of Bismuth Ferrite (BiFeO3) Nanoparticles Synthesized by Coprecipitation Method
Authors: Sulistiani Fitria Ayu , Suharyadi Edi , Kato Takeshi , Iwata Satoshi
Published: July 2020

Bismuth ferrite (BiFeO3) nanoparticles has been synthesized by coprecipitation method with various NaOH concentration (4, 6, 8, and 10 M) and temperature (RT, 60, 80, and 100 C). X-ray diffraction patterns showed the emergence of Bi(OH)3 and Bi25FeO40 structures with crystallite size in the range of 15.1 nm to 35.6 nm. The particles sample was agglomerated. Hysterisis loop showed the linear M–H loops behaviour with no magnetization saturation in 15 kOe maximum field applied which indicates the antiferromagnetic properties. The coercivity field tends to increase by the increasing of the NaOH concentration and synthesis temperature. In addition, the annealing treatment could leads the increasing of coercivity fields while decreasing the magnetization of BFO sampel.
COVID-19 Infection Risk in Pakistani Health-Care Workers
Authors: Usman Norina , Mamun Mohammed A. , Ullah Irfan
Published: July 2020

To combat the massive COVID-19 infection rates, the health-care workers (HCWs) are likely to work for long hours under substantial pressures, along with the infection risk. The consequence is that the HCWs become progressively hesitant to their works and psychologically impaired. In developing countries such as Pakistan, the health-care facilities are limited; hence, the HCWs safety measures are a great concern. Thus, these country needs a cost-effective strategy focusing on sympathetic discussions, that can be beneficial to reduce the psychological sufferings by ensuring the protection of the HCWs to facilitate proper services in combating with the COVID-19 crisis– which is provided in this commentary.
Attitudes toward Suicide
Authors: Adjaottor Emma Sethina , Ahorsu Daniel Kwasi
Published: July 2020

Introduction:

Appropriate attitudes toward suicide (ATTS) is key to preventing suicide, a major mental health challenge worldwide. Hence, this study examined the differences between urban and rural dwellers on ATTS (in total and across the subscales – principal attitude (suicide as a right), representations of intentionality, tabooing, preventability of suicide, and knowledge (myths about suicide).

Methods:

A cross-sectional survey design was used in this study. A convenient sampling technique was used to select 400 respondents from urban (n = 200) and rural (n = 200) areas. A questionnaire packet comprising a self-designed demographic section and valid ATTS scale was used for the data collection from respondents (urban and rural dwellers). Descriptive (frequency and percentages) and inferential (independent t-test) statistics were used to analyze the data using SPSS software. P < 0.05 was considered statistically significant.

Results:

Both urban and rural dwellers were found to have negative ATTS with urban dwellers (131.40 ± 10.75) having significantly more negative ATTS (P = 0.000) than rural dwellers (118.59 ± 13.62). Furthermore, urban dwellers were found to have significantly more negative attitudes toward principal attitude (suicide as a right), representations of intentionality, tabooing, preventability of suicide, and knowledge (myths about suicide) than rural dwellers (P = 0.000).

Conclusion:

Settings influence ATTS such that urban dwellers have become more informed and more prepared to help prevent suicide compared with their rural counterparts.
Social Determinants of Menstrual Hygiene Among School-Going Girls in a Rural Area of Southern Haryana, India
Authors: Surana Avinash , Rajesh D. R. , Tank Rakesh , Singh Abhishek , Gupta Vikas , Agrawal Deepika , Chhoker Virender Kumar
Published: July 2020

Introduction:

Several factors associated with menstrual hygiene are modifiable and if such factors are identified and addressed, it can go a long way in promoting good menstrual hygiene practice among adolescent girls. The present study was conducted with an aim to investigate the social determinants for menstrual hygiene-related knowledge and practices among rural school-going girls.

Methods:

This cross-sectional study included 649 school-going girls (12–19 years) from two government schools. A pretested, predesigned, standardized questionnaire was prepared which included demographic details such as age, sociodemographic characteristics, knowledge regarding menstruation, restrictions practiced, absenteeism during menstruation, the practice of menstrual hygiene. Multiple logistic regression model at a significant level of 0.05 was used.

Results:

The mean age of menarche in the study population was 12.8 ± 1.73 years. Mother's education and family socioeconomic status showed a trend with poor menstrual hygiene. The study participants belonging to the age group of 12–14 years were nearly 2.3 times more likely to have poor hygiene practices than the study participants belonging to the age group of 18 years or more. Absence of sanitary latrines (adjusted odds ratio [OR]: 2.34, 95% confidence interval [CI]: 1.65–3.31,P= 0.000), lower class in school (adjusted OR: 11.65, 95% CI: 7.19–18.86,P= 0.010), and joint families (adjusted OR: 2.19, 95% CI: 1.42–3.32,P= 0.022) also showed a high positive association with the odds of practicing poor menstrual hygiene.

Conclusion:

This study reveals that adolescent girls in rural area had ignorance, false perceptions, and unsafe practices regarding menstruation. Thus, the above findings reinforce the need to encourage safe and hygienic practices among the adolescent girls and bring them out of the traditional beliefs, misconceptions, and restrictions regarding menstruation.
Acciones en convivencia escolar de equipos directivos y líderes escolares en Chile: ¿Qué? ¿Con quiénes? y ¿Dónde?
Authors: Aravena Felipe , Ramirez Jahel , Escare Karla
Published: July 2020

Este estudio tiene por objetivo describir qué acciones en convivencia escolar están realizando los equipos directivos y líderes de escuelas públicas en Chile. Se utilizó un enfoque cualitativo descriptivo, con un total de 67 participantes pertenecientes a 24 establecimientos públicos de la región de Valparaíso. Los hallazgos indican que las acciones que desarrollan los equipos directivos se concentran en efectuar talleres de formación, realizar eventos y elaborar planes, manuales y protocolos de convivencia escolar. En tanto, más de un 85% de las acciones se desarrollan fuera del aula, lo que advierte una escasa conexión pedagógica de la convivencia escolar. Finalmente, las acciones las dirigen los adultos de manera solitaria, principalmente por los encargados de convivencia y profesionales de la dupla psicosocial. Se concluye que los equipos directivos desarrollan diversas acciones en convivencia escolar que son producto de una política pública híbrida que apoya y presiona el quehacer profesional.
Características de las prácticas de liderazgo pedagógico en programas de integración escolar que favorecen el trabajo colaborativo entre docentes
Authors: Rivera Medina Yovely Del Carmen , Aparicio Molina Carolina
Published: July 2020

En los últimos años se ha presentado dado fuerza al concepto de liderazgo pedagógico en las instituciones escolares, así se incentiva a innovar, focalizar y favorecer el desarrollo de los aprendizajes. Recientes investigaciones en Chile han demostrado su práctica en distintos agentes educativos como el director y jefe de Unidad Técnico-Pedagógica, sin embargo, no se encuentran estudios que aborden en profundidad la experiencia de otros miembros de los equipos directivos como líderes pedagógicos dentro del sistema escolar. De aquí que este estudio aborde las características del liderazgo pedagógico en contextos del Programa de Integración Escolar (PIE), como un área del trabajo docente relevante para ahondar y reflexionar debido a sus características vinculadas a este enfoque. Para ello se realizó un estudio cualitativo en base a entrevistas, con el fin de identificar las características del liderazgo pedagógico de coordinadoras de programas PIE reconocidos en su entorno por desarrollar buenas prácticas educativas.
Coeducador y modelo lingüístico: presencia de la comunidad sorda en el contexto educativo chileno y colombiano
Authors: Catin Quicel Gabriela Karina , Villanueva Vallejos Valeria Beatriz , Muñoz Vilugrón Karina Andrea , Cárdenas Chávez Catalina Marianne
Published: July 2020

La presencia del adulto sordo es fundamental en la educación de los estudiantes sordos, puesto que es un referente lingüístico, cultural e identitario. El objetivo del artículo es develar las funciones del perfil del coeducador chileno y del modelo lingüístico colombiano. Los instrumentos aplicados fueron entrevistas semiestructuradas; los resultados en el contexto chileno muestran categorías en funciones de transmisión de la lengua de señas, cultura e identidad sorda y apoyo pedagógico, y en el contexto colombiano, se presentan las categorías lingüístico-comunicativo y sociocomunitaria. En ambos contextos surgen categorías emergentes: en el chileno, la de apoyo familiar, y en el colombiano, la de apoyo pedagógico. En cuanto a las conclusiones, se determina que las funciones prescritas a través del Perfil del Coeducador Chileno y de la Cartilla del Modelo Lingüístico Colombiano, son conocidas y aplicadas por los adultos sordos mediante diferentes estrategias.
Intersección escuela-universidad: un espacio híbrido de colaboración para fortalecer la formación inicial y el desarrollo profesional docente
Authors: Tenorio Eitel Solange Andrea , Jardi Ferré Andrea , Puigdellívol Aguadé Ignasi , Ibañez Salgado Nolfa
Published: July 2020

Ante el desafío del mejoramiento de los sistemas educativos, una posibilidad para avanzar emerge de la articulación entre escuela y universidad. Este artículo presenta un estudio cualitativo, basado en un estudio de caso único e intrínseco, definido aquí como un grupo de trabajo (GT) conformado por dos universidades y escuelas de una comunidad autónoma española. La investigación describe cómo se configura un espacio relacional interinstitucional y contó con la participación de maestras/os de escuelas y académicas/os universitarias/os, miembros del GT. Nuestros resultados destacan cinco ejes que estructuran y caracterizan este espacio relacional, donde la reflexión sobre problemáticas de la práctica educativa cotidiana converge con el saber académico y con el conocimiento práctico de la comunidad escolar. Nuestros hallazgos acentúan el enriquecimiento tanto de las experiencias educativas escolares como universitarias, a través de la transferencia del conocimiento coconstruido gracias a la colaboración interinstitucional.
Dampak Parking Stand Double Nose-In terhadap Pelayanan Lalu Lintas Udara di Perum LPPNPI Cabang Madya Denpasar
Authors: Irfan
Published: July 2020

Tujuan penelitian ini untuk menganalisis dampak parking stand double nose-in guna  meningkatkan kelancaran pergerakan pesawat udara. Metode yang dilakukan melalui deskriptif kualitatif yang bersumber dari data pergerakan pesawat schedule dan unscheduled.Hasil penelitian menunjukkan bahwa dengan tidak adanya parking stand double nose-in serta south apron digunakan sebagai passenger terminal apron dapat memuat keseluruhan jumlah traffic arrival maupun departure. Dengan demikian parking stand pada north apron dan south apron dapat sesuai dengan standar sehingga berdampak positif pada keselamatan dan kelancaran lalu lintas udara. Oleh karena itu direkomendasikan agar north apron dan south apron sebagai passenger terminal apron sehingga keteraturan pergerakan pesawat dapat ter capai.
Social portrait of patients of the cardio-rehabilitation unit of a large cardio-surgical center
Authors: Zubko Aleksandr V. , Sabgayda Tamara P. , Zemlyanova Elena V. , Filatova Angilina G. , Kakuchaya Tea T. , Zaporozhchenko Vyacheslav G. , Polesskii Vladimir A.
Published: July 2020

Background. The social portrait of patients often helps to define preventive measures for specific diseases in patients of different social and age groups. Need in cardio-surgery is substantiated not only by inborn but also by acquired diseases of heart, in most cases - ischaemic heart disease. The development of cardiovascular diseases is affected by multiple factors including lifestyle. Objective. To analyze the social and behavioral characteristics of cardio-surgical patients. Materials and methods. The authors analyzed the results of a survey of 93 patients in the rehabilitation unit of V.I. Burakovsky Research Institute of Cardiosurgery in 2019. The adapted questionnaire for identifying factors affecting population health was used. The respondents were divided into 3 age groups: 12 patients were under 40 years (mean age of 30.1, 75.0% men); 50 patients - 40-65 years (mean age of 56.4, 76.0% men); 30 patients - 65+ years (mean age of 70.3, 50.0% men). To analyze differences Chi-square and Fisher exact tests were applied. Results. Educational level is increasing with age. Financial well-being was estimated as poverty by one-third of respondents in all groups. 5.4% are dissatisfied with their family relations. The feeling of loneliness is often experienced by 4.3% of respondents. About one-half of respondents mentioned they do not care about their health and 18.5% of the don’t know their diseases to be treated using cardio-surgery. More than half of respondents are uneasy about their future uncertainty. Discussion. The respondent’s’ social status differs in age groups. The social and behavioral characteristics of patients of the cardio-rehabilitation unit allow them to create an integrated social portrait. Conclusions. Patients of cardio-rehabilitation units are characterized by higher educational levels and employment, better financial conditions. Among them, there were few lonely persons, but many sedentary ones. Such patients are characterized by a non-responsible attitude to their health, higher frequency of smoking, overweight, and obesity. Age-specific differences are related to physical fitness but nor to attitude to health neither to self-protective behavior.
Safety of imported agricultural products: pesticide residues
Authors: Rakitskii Valeriy N. , Doan Ngoc Hai , Fedorova Nataliya E. , Bereznyak Irina V. , Lo Van Tung , Egorchenkova Ol’ga E. , Grechina Marina S.
Published: July 2020

Introduction. From the evaluation of the positions of residual quantities of pesticides, the hygienic safety assessment of imported food products is most relevant under the current agreement on a free trade zone between the EAEU and the Socialist Republic of Vietnam, as well as in connection with a large list of chemical plant protection products used during the vegetation of crops. The purpose of the study. Rating the level of residual quantities of pesticides in samples of selected food products produced in Vietnam is the purpose of the study. Research objectives. To quantify 42 active ingredients of pesticides (and their metabolites) in samples of rice grain, dragon fruit (pitahaya), avocado, mango and banana (fresh and dried) are the research objectives. Material and methods. Multicomponent and individual methods based on LC and GC with MS-detection and FLD were used to identify active ingredients of pesticides. The sample preparation procedure with QuEChERS technology was used for the multi residues determination of the 40 compounds. The determination of avermectins (abamectin and emamectin benzoate) was carried out after the conversion of substances into fluorogenic derivatives. Results. Residual amounts of tebuconazole (rice - 0.53 ppm, mangoes - 0.26 ppm, avocado - 0.15 ppm), fludioxonil (rice - 0.017 ppm), imidacloprid (dried mangoes - 0.01 ppm), carbendazim (dried mangoes - 0.011 ppm) were identified in single samples No residual avermectins have been identified. The content of substances in the analyzed samples of dragon fruit (pitahaya) did not exceed 0.01 ppm. Discussion. The results obtained in the work are compared with the data of the annual pan-European and national monitoring, information on which is publicly available (2017), including imported goods, according to which rice and dragon fruits as objects of monitoring are given increased attention. Conclusions. The safety of certain types of food products imported from Vietnam is shown by the content of residual quantities of pesticides.
NOVEL HAFALAN SHOLAT DELISA KARYA TERE LIYE
Authors: Wijaya Candra , Harahap Sri Rezeki
Published: July 2020

Given the importance of character in building strong human resources, the need for character education is carried out appropriately. It can be said that the formation of character is something that can not be separated from life. Therefore, care is needed by various parties, both by the government, the community, families and schools. Novels as a form of literary work are expected to bring up positive values for the audience so that they are sensitive to problems related to social life and encourage reading novels that can realize positive messages in the novel with good behavior in social life. When the world of education is considered to only pursue and prioritize the academic realm, so that it ignores moral issues and nobility. Literary work in the form of a novel entitled HSD by Tere Liye, seems to be a strategic intermediary for realizing the goal of instilling character education to students because in the novel contains values that must be straightened out.