bluuebunny/crossref_metadata_2025_split huggingface dataset:
Dendritic structure formation of magnesium alloys for the manipulation of corrosion properties: Part 2 – corrosion
Authors: Łakoma Piotr , Ditze André , Scharf Christiane 
Published: June 2019

AbstractIn pure magnesium and aluminum-containing magnesium alloys, the microstructure also plays a role in the corrosion properties. In Part 1, the grain sizes, secondary dendrite arm spacings (SDAS) and precipitates of β phase were determined by casting samples with 0, 3, 6, 9 and 12 % aluminum (all compositions in mass percentage) at different cooling rates. These samples were tested for corrosion properties by immersion and salt spray tests. The modeling of the corrosion process enables establishing a mathematical link between the microstructure and corrosion properties of an alloy. The results show an increase in the corrosion rate with increasing aluminum contents and the cooling rate. The precipitations at the grain boundaries have a relevant impact on corrosion properties of the magnesium–aluminum alloys. A random comparison using the salt spray test tends to confirm the results.
Pengaruh Video Interaktif dan Media Gambar terhadap Kemampuan Merawat Diri pada Anak Tunagrahita
Authors: Rosmaya Indah , Sulaeman Suhendar , Purwati Nyimas Heny 
Published: June 2019

The purpose of this studies was to determine of the effectiveness of interactive video and image media on personal care of mental retardation children in special school 01 Serang Banten. This studies was quasy experiment with non equivalent without control group. 27 mental retardation in this studies. The data collected using personal care questionnaire (alpha cronchbach= 0,947). The result of this studies found that there is mean difference personal care ability in children before and after video interactive intervention (p value= 0,015, ∆=6,67), there is mean difference personal care ability in children before and after image media intervention (p value= 0,006, ∆= 3,23), and there is mean difference personal care ability in children before and after interactive video and image media intervention (p value= 0,003, ∆=1,45). The use of interactive video interventios is more recommended as leaning media in improving ability of personal care on mental retardation children, but must be supported by facilities and infrastructure.
Keyword: Interactive Video, Image Media, Mental Retardation Children, Personal Care
Development of the collaborative economy in Ecuador
Authors: Sanchez Ruiz Jefferson , Moreno Salazar Yenny 
Published: June 2019

Introduction.The collaborative economy is a new trend that generates sources of sustainable and sustainable work through digital platforms that operate in the sectors of space utilization. Objectivediagnose scientific production in Ecuador in relation to the collaborative economy Materials and methodsWe used a blibliometric review of scientific articles that speak of collaborative economics at an international level, from Latin America and Ecuador in Scielo, Scopus and other bibliographic documents. Results I can show that the participation of the sectors of the collaborative economy at the international level are in transportation. DiscussionThe most developed market is Brazil, with a very specific language and market size context that makes it interesting even for local initiatives. Conclusions It is determined that Ecuador is still in an incipient state and has not yet taken full advantage of its use of resources of the productive matrix for the development of the collaborative economy.
Nutritional assessment of Nursing in pregnant adolescents
Authors: Franco Poveda Kristy , Holguín Jiménez Martha , Rivera Salazar Geny , Gordillo Ojeda Mercy 
Published: June 2019

Introductionthe stage of adolescence is a vital process to become adults, where physiologically many changes are going to occur and eating habits will significantly influence this process. Pregnant women should maintain a balanced, varied and sufficient diet to avoid future nutritional complications related to inadequate intake, producing imperfections in fetal growth and development. Objectiveto assess the nutritional status of pregnant adolescents and identify the socio-psycho-cultural and intrafamilial factors that influence it. Materials and methodsQuantitative, descriptive and transversal. Technique: Observation and Direct Survey. Instrument: Questions questionnaire and direct observation matrix directed to pregnant teenagers. Resultspregnant adolescents between 17 to 19 years of age who were in the second trimester of pregnancy, with complications characterized by low weight, anemia, preeclampsia and gestational diabetes. Discussionthey live in precarious conditions or in an environment of violence, so that the maintenance of pregnancy or the growth of the infant will become difficult.Conclusions The pregnant adolescent is considered high risk due to the complications involved from the anato-physiological structure.
Determinants of the wage gap in Ecuador: analysis under a minceriano model related to dummy aggregate variables
Authors: López Lapo Jorge Luis , Sarmiento Castillo Germania 
Published: June 2019

Introduction The Human Capital Theory exposes that inequality in labor income is due to different factors, including productivity and education. Objectiveanalyze income inequality in the Ecuadorian labor market. The research takes data from the National Employment, Unemployment and Underemployment Survey of INEC estimating the Mincerian equation (1974) by adding dummy variables.Materials and methods The research takes data of secondary information that rests in the ENEMDU survey updated to December 2018 that includes the characteristics of the EAP in Ecuador. Resultscharacterization of the gender variable, schooling positively influences their hourly wages. Discussion Regarding the gender variable, this long term of not correcting the salary differences may have an impact on old age. ConclusionsWhen there is gender discrimination, it is imperative to identify and quantify the jobs and professions to which women have access in a lesser proportion.
Bibliometric analysis as a tool for monitoring scientific production in Rural Psychology
Authors: Camargo Barrero José Antonio , Castañeda Polanco Juan Gabriel 
Published: June 2019

Introduction.Rurality is a very topical issue in a country like Colombia, due to its demographic and psychosocial conditions; however, little is known about the research development of rural psychology. Objective.Identify the current state of scientific production around rural psychology in the Scopus, Scielo, Dialnet and Redalyc databases in the last 10 years. Materials and methods. It is a bibliometric, descriptive and introspective study, with a final sample of 46 articles published in the last 10 years in journals indexed in the databases. Results It was identified that the country that publishes the most topics related to rural psychology is Brazil and 2016-2017 were the years with the highest scientific production registered in the last 10 years. Discussionof the direct relationship of education with the level of wages, great care should be taken when referencing this result. Conclusion.Rural psychology is a field of research that requires greater attention on the part of Latin American researchers.
Resilience in drug-dependent patients of the Therapeutic Community "Camino a La Paz"
Authors: Tarazona Meza Anicia Katherine , Sierra Delgado José Javier 
Published: June 2019

Introduction. The present investigation was carried out in the therapeutic community "Camino a la Paz" that provides professional services of psychological care for the prevention, treatment and rehabilitation of alcohol and drug addictions. Objectiveto determine the levels of resilience in the treatment and rehabilitation of drug-dependent patients. Materials and methodsthe research was developed in a sample of 60 patients and 4 professionals from the "Camino a la Paz" Therapeutic Community, using the SV-RES test (Saavedra, 2008) as a tool, patients and a survey of professionals. who work in the area. The study is of an exploratory-descriptive nature and its inductive-deductive method. ResultsThe results obtained indicate that the resilience is fostered and develops during the time determined by the psychotherapeutic process. Discussionthe results of the study determine that the levels of resilience in the patients of the Therapeutic Community "Camino a la Paz" are mostly in the average level. ConclusionsThe analysis obtained in the verbalization I can, indicate that the values of the affectivity and self-efficacy factors stand out with a high level of resilience.
Model for strategic alignment in educational organizations
Authors: Salgado García Lorenzo , Calvillo Barrios Juan , Hernández de la Rosa Eduardo 
Published: June 2019

Introduction.The strategic alignment is an added value to the content presented by the organizations as it goes beyond planning and penetrates all the managerial functions demanding an integrating view of the entire process. Objective. We propose to apply the proposal of strategic alignment to the Mexican educational organizations Materials and methods. Using quantitative research, the hard data that support the application of strategic alignment as a mechanism to transform education in Mexico are presented. ResultsIt was possible to determine which are the concrete manifestations of alignment as a process in Mexican companies. DiscussionStrategic alignment is a planned process through which management achieves superior results. Conclusion. The identification of alignment factors is a necessary condition for the organization to be able to use them effectively to obtain additional value.
Simulation of quasi spherical gravitational waves in the characteristic formulation
Authors: Suárez Carreño Franyelit María , Dionisio Rosales Luis 
Published: June 2019

Introduction :A review is made of gravitational waves, their simulation and the methods used for their definitive detection in 2015. A comparison of electromagnetic waves with gravitational waves and the main technological efforts made over decades for their detection is presented. Objective:is to detect OG from massive black holes and galactic and extragalactic binary stars in a frequency range of 10-4 to 10-1 Hz. Materials and methods: Numerical methods used in its simulation are specified, emphasizing computational techniques used in recent years. Results:The boundary is placed at x = 2/3 and the parameters are used for the simulations shown in figures 3 and 4: number of points of the angular mesh Nq = Np = Nξ = 45, and for the radial mesh Nx = 100 , A = 10-3, Ra = 4, Rb = 7. Discussion:The simulations were carried out with a code programmed in FORTRAN 90 and run under the LINUX free software platform. The figures were generated with the Dx plotter under LINUX environment, allowed to evaluate the respective equations and give a satisfactory answer to the proposed objectives. Conclusions:it was possible to conclude that the detection of gravitational waves is possible, however it is necessary to improve the sensitivity, which will allow the detection of new events collecting information about sources three times more distant, and increasing the probability of detection.
ASSESSMENT OF ANTIMICROBIAL ACTIVITY OF AZADIRACHTA INDICA FROM MAHALAPURAM, JAIPUR
Authors: Mishra Sweta , Sharma Vishnu , Yesudas Rincy , Rajput Ritu Singh 
Published: June 2019

The medicinal plants have been used for years in daily life to treat infections all over the world. Azadirachta indica is a very valuable traditional therapeutic plant in the sub-continent regions. Each part of the tree has remarkable medicinal properties. In the present study, Phytochemical study yielded positive results for tannins, cardiac glycosides, anthraquinones, and saponins. The terpenoids was found to be missing. In antimicrobial studies, the organic and aqueous Leaf extract of Azadirachta indica found to show inhibitory action against the growth of Staphylococcus aureus and Escherichia coli that reveal the presence of pharmacologically bioactive constituents in Azadirachta indica.
Key words: Nature; Azadirachta indica; Ayurveda; antimicrobial activity
Reconciling CV phonotactics and high vowel deletion in Japanese
Authors: Whang James 
Published: June 2019

High vowel devoicing is a productive process in Japanese, where /i, u/ become unphonated between voiceless obstruents. Recent studies have shown that the vowels can completely delete as a result of the process, resulting in surface consonant clusters. This seemingly conflicts with the strong CV phonotactic preference that has repeatedly been shown in both phonological and psycholinguistic studies of Japanese. This paper proposes that the apparent conflict can be resolved by having phonotactic repairs and high vowel devoicing apply at different phonological levels, adopting a more sophisticated phonological representation than simple /underlying/ vs. [surface] forms. The proposed framework also makes an empirically testable prediction regarding syllabification of clusters that result from high vowel deletion.
Inner Source Pickup Ions from Chondritic Smooth Interplanetary Dust Particles
Authors: Quinn P. R. , Schwadron N. A. , Möbius E. 
Published: June 2019

Abstract
Inner source pickup ions (PUIs) are thought to be produced by the interaction between solar wind ions and interplanetary dust particles (IDPs). The amount of PUIs produced and their velocity distribution depend on the composition, density, porosity, and size of the IDPs. Quinn et al. simulated the production of PUIs from chondritic porous (CP) IDPs. The study showed that the composition of PUIs produced from CP IDPs nearly resembled the solar wind. The purpose of this study is to expand upon Quinn et al. to chondritic smooth (CS) IDPs to get a more complete description of inner source PUI production. We simulate the production and transport of C+ and O+ PUIs using the Stopping and Range of Ions in Matter and the Energetic Particle Radiation Environment Module. We consider five production mechanisms: solar wind recycling, neutralization, backscattering, sputtering, and sputtering-induced recycling. Comparisons are made to observational studies that used the Charge-Time-Of-Flight instrument on board the SOlar and Heliospheric Observatory. Results indicate that sputtering is the dominant mechanism. This results in an inner source PUI composition that resembles the dust grains, which are rich in species such as C and O and poor in species such as Ne. However, studies by Ulysses show that inner source PUIs produced inside of ∼0.5 au have a composition similar to that of the solar wind. Thus, we conclude that the IDP population close to the Sun is dominated by CP IDPs rather than CS IDPs.
A Parametric Study of the Structure of Hall Magnetic Field Based on Kinetic Simulations. I. Anti-parallel Magnetic Reconnection in an Asymmetric Current Sheet
Authors: Sang Longlong , Lu Quanming , Wang Rongsheng , Huang Kai , Wang Shui 
Published: June 2019

Abstract
The generation of the Hall magnetic field is considered one of the most important characteristics in collisionless magnetic reconnection. Here, in this paper, with two-dimensional particle-in-cell simulations, we study the structure of the Hall magnetic field generated during anti-parallel magnetic reconnection in an asymmetric current sheet. A quadrupolar structure of the Hall magnetic field is first formed, and then it evolves into a hexapolar structure with the proceeding magnetic reconnection. In the quadrupolar structure of the Hall magnetic field, the quadrants on the side of the current sheet with the weaker magnetic field (the dominant Hall magnetic field) are much stronger than those on the other side, and they can cross the center of the current sheet. With the increase of the ratio of the magnetic fields or the decrease of the density ratio (here, the ratio is defined as the values between the side with the stronger magnetic field to that with the weaker magnetic field), the tendency will become more salient. However, with a decrease of the temperature ratio, the tendency reverses. With the proceeding reconnection, two ribbons with an enhanced Hall magnetic field are generated in the region below the dominant Hall magnetic field, and then a hexapolar structure of the Hall magnetic field is formed, which will become stronger with an increase of the ratio of the magnetic field or decrease of the density, while the effect of the temperature asymmetry is much weaker than that of the magnetic field and density asymmetry. The generation of the Hall magnetic field can be explained by the in-plane current carried mainly by the electrons.
Broadband Intensity Tomography: Spectral Tagging of the Cosmic UV Background
Authors: Chiang Yi-Kuan , Ménard Brice , Schiminovich David 
Published: June 2019

Abstract
Cosmic photons can be efficiently collected by broadband intensity mapping but information on their emission redshift and frequency is largely lost. We introduce a technique to statistically recover these otherwise collapsed dimensions by exploiting information in spatial fluctuations and apply it to the Galaxy Evolution Explorer (GALEX) All Sky and Medium Imaging Surveys. By spatially cross-correlating photons in the GALEX far-UV (1500 Å) and near-UV (2300 Å) bands with a million spectroscopic objects in the Sloan Digital Sky Survey as a function of redshift, we robustly detect the redshift-dependent intensity of the UV background (UVB) modulated by its clustering bias up to z ∼ 2. These measurements clearly reveal the imprints of UVB spectral features redshifting through the filters. Using a simple parameterization, we simultaneously fit a UVB emissivity and clustering bias factor to these observations and constrain the main spectral features of the UVB spectrum: (i) the Lyman break, (ii) the non-ionizing UV continuum, which agrees with the Haardt & Madau model but does not rely on any assumption regarding the nature of the sources, and (iii) the Lyα emission, the luminosity density of which is consistent with estimates of the combined galaxy and active galactic nucleus contributions at z ∼ 1. Because the technique probes the total background including low surface brightness emission, we place constraints on the amount of UV light originating from the diffuse intergalactic medium (IGM). Finally, the clustering bias of UV photons is found to be chromatic and evolving. Our frequency- and redshift-dependent UVB measurement delivers a summary statistic of the universe’s net radiation output from stars, black holes, and the IGM combined.
Modeling the Effects of Observational Gaps on p-mode Oscillation Parameters
Authors: Keith-Hardy J. Z. , Tripathy S. C. , Jain K. 
Published: June 2019

Abstract
We investigate the effect of the window function on the parameters of solar acoustic oscillations, namely frequency, amplitude, and width, using the data from Global Oscillation Network Group (GONG). This is carried out by simulating 108 new time series from a base time series by modifying the window functions. In order to minimize the effect of solar activity, the base time series was chosen during the activity minimum period. The new window functions were randomly chosen from a set of 30 observed window functions to incorporate the reported duty cycles of the GONG network. The modified time series were processed through the standard GONG p-mode pipeline to extract the mode parameters that were fitted to a linear model as a function of the duty cycle to yield the correction factor. We find significant changes between the observed and corrected amplitudes and widths while the change in mode frequencies was found to be insignificant. We also analyze the variation of the corrected mode parameters over the solar cycles 23 and 24 and compare their correlations with 10.7 cm radio flux, which represents a proxy of the solar activity.
Effect of Accreting Tidally Disrupted Stars on the Spin Evolution of ∼106 M⊙ Black Holes
Authors: Zhang Xiaoxia , Lu Youjun , Liu Zhu 
Published: June 2019

Abstract
Accretion of tidally disrupted stars (TDSs) is expected to contribute significantly to the growth of massive black holes (MBHs) with mass ∼106

in galactic centers. In this paper, we quantitatively investigate the effect of the TDS accretion on the spin evolution of these relatively small MBHs, by also considering the accretion of gas clouds with (many) chaotic episodes. We find that the accretion of TDSs can play an important role or even a dominant role in shaping the spin distribution of ∼106

MBHs, depending on the contribution fraction (

) of the TDS accretion to the MBH growth. If

is as large as

, most

MBHs have low spins (

); if

is as small as

, most

MBHs have high spins (

). We also find that (1) the fraction of highly spinning ∼106

MBHs in the TDS accretion states is smaller than that in the gas-cloud (active galactic nucleus [AGN]) accretion states, which is a consequence of more rapid spin decrease during the period of consecutive TDS accretion than the spin increase during the AGN periods when the spin is large; and (2) the fraction of retrograde-spin accretion in the TDS accretion states is almost the same as that of prograde-spin accretion, while it is negligible in the gas-cloud (AGN) accretion states. The current scarce sample of AGNs (∼106

) with spin measurements hints at an insignificant contribution from TDS accretion to MBH growth. Future measurements on spins of ∼106

MBHs may provide stronger constraints on the importance of both AGN and TDS accretion states in their growth history.
Constraining the Black Hole Initial Mass Function with LIGO/Virgo Observations
Authors: Perna Rosalba , Wang Yi-Han , Farr Will M. , Leigh Nathan , Cantiello Matteo 
Published: June 2019

Abstract
Prior to the detection of black holes (BHs) via the gravitational waves (GWs) that they generate at merger, the presence of BHs was inferred in X-ray binaries, mostly via dynamical measurements, with masses in the range between ∼5 and 20 M
⊙. The Laser Interferometer Gravitational-Wave Observatory (LIGO) discovery of the first BHs via GWs was surprising in that the two BHs that merged had masses of

and

, which are both above the range inferred from X-ray binaries. With 20 BH detections from the first/second observing (O1/O2) runs, the distribution of masses remains generally higher than the X-ray inferred one, while the effective spins are generally lower. This suggests that, at least in part, the GW-detected population might be of dynamical origin rather than produced by the common evolution of field binaries. Here we perform high-resolution N-body simulations of a cluster of isolated BHs with a range of initial mass spectra and upper mass cutoffs, and study the resulting binary mass spectrum resulting from the dynamical interactions. Our clusters have properties that are similar to those of the massive remnants in an OB association ∼10 Myr after formation. We perform a likelihood analysis for each of our dynamically formed binary population against the data from the O1 and O2 LIGO/Virgo runs. We find that an initial mass spectrum M
BH ∝ M
−2.35 with an upper mass cutoff M
max ∼ 50M
⊙ is favored by the data, together with a slight preference for a merger rate that increases with redshift.