bluuebunny/crossref_metadata_2025_split huggingface dataset:
El ustedeo en tres zonas del departamento de Antioquia (Colombia) / The use of usted in three areas of the department of Antioquia (Colombia)
Authors: Jang Ji Son 
Published: May 2021

Resumen
En este trabajo se presentan algunos resultados acerca del uso del usted de una investigación sobre la selección pronominal llevada a cabo en tres municipios del departamento colombiano de Antioquia: 1) La ciudad de Medellín, que se considera zona urbana; 2) Carmen de Viboral, que se comprende como una zona semi rural (a una hora de la ciudad en automóvil) y 3) Andes, que se entiende como una zona rural (se sitúa a unas tres horas de la ciudad en coche). Más concretamente, se muestra, por un lado, en cuál de las tres zonas se emplearía con más frecuencia el usted y, por el otro, en qué zona se observa más notablemente la dependencia entre la selección del usted y la edad del interlocutor. La población estudiada está constituida por informantes de edades entre los 13 y los 34 años. La variable social para este artículo es el lugar de la vivienda de los informantes, es decir, zona urbana (Medellín), semi rural (Carmen de Viboral) o rural (Andes) lo cual se ha correlacionado con la edad de los informantes. Para llevar a cabo esta investigación se aplicó un cuestionario, donde aparecen distintos tipos interaccionales, a los informantes de las zonas mencionadas, obteniéndose un total de 1.490 informantes. Tres técnicas estadísticas fueron aplicadas a estos datos: 1) tamaño de muestra óptimo para distribuciones multinomiales; 2) análisis de varianza con un solo factor (ANOVA); 3) prueba de hipótesis para proporciones. La estadística muestra que, por un lado, en la gran mayoría de relaciones interpersonales, en Andes se usa más el usted que en Carmen de Viboral y, asimismo, en este último municipio se emplea más el usted que en Medellín; por otro lado, en Medellín, en comparación con Carmen de Viboral o Andes, se usa más el usted con interlocutores de mayor edad que con los de la misma o menor edad. En otras palabras, en las zonas rurales se usa mucho más el usted que en la zona urbana, independientemente de la edad de los interlocutores, como marca de costumbres más conservadoras.
Glutamate Signaling via the AMPAR Subunit GluR4 Regulates Oligodendrocyte Progenitor Cell Migration in the Developing Spinal Cord
Authors: Piller Melanie , Werkman Inge L. , Brown Robin Isadora , Latimer Andrew J. , Kucenas Sarah 
Published: May 2021

Oligodendrocyte progenitor cells (OPCs) are specified from discrete precursor populations during gliogenesis and migrate extensively from their origins, ultimately distributing throughout the brain and spinal cord during early development. Subsequently, a subset of OPCs differentiates into mature oligodendrocytes, which myelinate axons. This process is necessary for efficient neuronal signaling and organism survival. Previous studies have identified several factors that influence OPC development, including excitatory glutamatergic synapses that form between neurons and OPCs during myelination. However, little is known about how glutamate signaling affects OPC migration before myelination. In this study, we usein vivo,time-lapse imaging in zebrafish in conjunction with genetic and pharmacological perturbation to investigate OPC migration and myelination when the GluR4A ionotropic glutamate receptor subunit is disrupted. In our studies, we observed thatgria4amutant embryos and larvae displayed abnormal OPC migration and altered dorsoventral distribution in the spinal cord. Genetic mosaic analysis confirmed that these effects were cell-autonomous, and we identified that voltage-gated calcium channels were downstream of glutamate receptor signaling in OPCs and could rescue the migration and myelination defects we observed when glutamate signaling was perturbed. These results offer new insights into the complex system of neuron-OPC interactions and reveal a cell-autonomous role for glutamatergic signaling in OPCs during neural development.SIGNIFICANCE STATEMENTThe migration of oligodendrocyte progenitor cells (OPCs) is an essential process during development that leads to uniform oligodendrocyte distribution and sufficient myelination for central nervous system function. Here, we demonstrate that the AMPA receptor (AMPAR) subunit GluR4A is an important driver of OPC migration and myelinationin vivoand that activated voltage-gated calcium channels are downstream of glutamate receptor signaling in mediating this migration.
De novo migraine with aura in the third trimester of pregnancy: a case report and literature review
Authors: Paškevičiūtė Elena , Bužinskienė Diana , Ryliškienė Kristina 
Published: May 2021

Background: Among all headache disorders, migraine has the highest prevalence during gestation. The majority of migraineurs experience improvement during pregnancy, but a few may experience migraine for the first time. This poses a diagnostic challenge in the differential diagnosis between primary and life-threatening secondary headache disorders. Because pregnancy itself is an independent risk factor for secondary headache disorders, it is mandatory to exclude these conditions in order to diagnose migraine. There is a large body of literature about pre-existing migraine course during pregnancy and its link with adverse pregnancy outcomes, but there are no studies examining these aspects among women with new-onset migraine during pregnancy.Case report. A 31-year-old female at 33 weeks of gestation (gravida 2, para 2) was referred to the neurologist eds disturbances, which were followed by pressing severe headache, rated as 8 out of 10 on a numeric rating scale and accompanied by dizziness. The headache lasted for one day, and dizziness continued to the following day. The patient was investigated for a secondary headache disorder, but laboratory and neuroimaging results were unremarkable. A migraine with aura was diagnosed. The patient was advised to keep a consistent sleep schedule, maintain regular low physical activity, eat regularly and take magnesium supplementation. The patient was informed about a safe treatment approach in case of an acute attack. At 40 weeks of gestation the patient delivered female newborn, weighing 3750g, with Apgar scores of 8 and 9 (due to a nuchal cord). The postpartum period was uneventful. During the subsequent 4 years, the patient did not experience any recurrent migraine attacks and had no pregnancies.Conclusion. In order to diagnose a migraine during pregnancy, exclusion of secondary headache disorders is mandatory. Pregnant migraineur should be regularly monitored for adverse birth outcomes. It is essential to educate patients, provide information about the safe treatment of migraine attacks, and explain nonpharmacological prevention and supplementation benefits.
Applying Value-Belief-Norm Theory to Investigate Students' Waste Prevention Behaviour
Authors: Smilingytė Ernesta , Šorytė Dovilė 
Published: May 2021

Even though the increasing amount of waste is one of the biggest environmental challenges we currently face, surprisingly little is known about the psychological factors of waste prevention behaviour. The purpose of the study is to examine whether students‘ waste prevention behaviour can be predicted by the Value-Belief-Norm theory. In this paper, we report results from a questionnaire study of 221 students aged from 18 to 26 years. It was found that the Value-Belief-Norm theory could indeed explain students‘ waste prevention behaviour. As expected, findings indicate that high endorsement of biospheric values is associated with a strong ecological worldview, which was related to an increased awareness of environmental consequences. Those beliefs led to stronger personal norms, which were associated with more frequent waste prevention behaviour. Understanding students‘ waste prevention behaviour and the factors predicting it is a key step that could help to reduce the amount of waste that is generated. It is particularly relevant among students because higher education environment could be an effective place to increase students‘ pro-environmental behaviour and connect this behaviour with their values, beliefs and norms.
The Effect of Achievement Motivation on Organizational Commitment in High School Level of Education
Authors: Nurochim Nurochim 
Published: May 2021

AbstractThis article aims to discuss the effect of economic civil servant teachers' achievement motivation to the organizational commitment in Jakarta High Schools. All this time, Commitment is always associated with motivation. Organisational commitment is a picture of an individual who identifies with the organisation and has a common goal. Organisational commitment does not come by itself but is influenced by factors such as motivation. Therefore, it becomes vital to examine further the effect of motivation, in this case, the achievement motivation of teachers concerning organisational commitment. This study applied quantitative research design with survey methods while employing a path analysis model to analyse the data. A total of 200 economic teachers from the Municipality of East Jakarta, Central Jakarta, West Jakarta, South Jakarta, and the Thousand Islands District joined this study. Sampling in this study was chosen by (simple random sampling) of the population. This study found that based on the results of the analysis and testing of the hypothesis, it can be found that achievement motivation has given a direct positive effect to organizational commitment. Based on this empirical evidence, it can be seen that this finding shows that achievement motivation is one of the variables that have a direct positive effect on organisational commitment. AbstrakArtikel ini bertujuan untuk membahas pengaruh motivasi berprestasi guru PNS bidang ekonomi terhadap komitmen organisasi di SMA Negeri Jakarta. Selama ini Komitmen selalu dikaitkan dengan motivasi. Komitmen organisasi merupakan gambaran individu yang mengidentifikasikan diri dengan organisasi dan memiliki tujuan yang sama. Komitmen organisasi tidak datang dengan sendirinya tetapi dipengaruhi oleh faktor-faktor seperti motivasi. Oleh karena itu, menjadi penting untuk mengkaji lebih jauh pengaruh motivasi dalam hal ini prestasi belajar guru terhadap komitmen organisasi. Penelitian ini menggunakan desain penelitian kuantitatif dengan metode survei dengan menggunakan model analisis jalur untuk menganalisis data. Studi ini diikuti oleh 200 guru ekonomi dari Kota Jakarta Timur, Jakarta Pusat, Jakarta Barat, Jakarta Selatan, dan Kabupaten Kepulauan Seribu. Pengambilan sampel dalam penelitian ini dipilih dengan (simple random sampling) dari populasi. Penelitian ini menemukan bahwa berdasarkan hasil analisis dan pengujian hipotesis diketahui bahwa motivasi berprestasi berpengaruh langsung positif terhadap komitmen organisasi. Berdasarkan bukti empiris tersebut dapat diketahui bahwa temuan ini menunjukkan bahwa motivasi berprestasi merupakan salah satu variabel yang berpengaruh langsung positif terhadap komitmen organisasi. How to Cite: Nurochim (2020). The Effect of Achievement Motivation on Organizational Commitment in High School Level Of Education. TARBIYA: Journal of Education in Muslim Society, 7(2), 192-203. doi:10.15408/tjems.v7i2.15956.
Elementary Math Learning Design: An Integration with Islamic Environmental Ethics in the First Grade
Authors: Mauluah Luluk , Marsigit Marsigit , Wangid Muhammad Nur 
Published: May 2021

AbstractThis research discusses the design of mathematics learning based on Islamic Environmental Ethics (IEE). The purpose of the research was to discover how to implement IEE in elementary mathematics learning, especially grade 1. This qualitative research method begins with the analysis of condition grade1 to 6. By analyzing the themes of grade 1 to grade 6, then themes are qualified percentage according to the use of terms related to Islamic Environmental Ethics (IEE) and after that, compiled a matrix containing competencies, classes, activities and assessments to implement it. The results of this study are, the first year has the lowest percentage of 32.5 % of its IEE content so it needs to be developed. From the selection of basic competencies, KD 3.5, 4.5, 3.6 and 4.6 are selected for their implementation. The implications obtained by the IEE component concerning Islamic concern for the earth, especially those listed in the hadith on cleanliness. Based on the hadith, learning activities are arranged using used goods at worksheet one and worksheet 2. Based on its activities, assessment is prepared through rubrics, performance assessments and questionnaires. Abstrak Penelitian ini membahas tentang desain pembelajaran matematika berbasis Islamic Environmental Ethics (IEE). Tujuan dari penelitian ini adalah untuk mengetahui bagaimana penerapan IEE pada pembelajaran matematika SD khususnya kelas 1. Metode penelitian kualitatif ini diawali dengan analisis kondisi kelas 1 sampai dengan kelas 6. Dengan menganalisis tema dari kelas 1 sampai dengan kelas 6, maka tema tersebut memenuhi syarat. persentase sesuai penggunaan istilah terkait Islamic Environmental Ethics (IEE) dan setelah itu disusun matriks yang berisi kompetensi, kelas, kegiatan dan penilaian untuk mengimplementasikannya. Hasil dari penelitian ini, tahun pertama memiliki persentase terendah yaitu 32,5% konten IEE-nya sehingga perlu dikembangkan. Dari pemilihan kompetensi dasar tersebut dipilih KD 3.5, 4.5, 3.6 dan 4.6 untuk pelaksanaannya. Implikasi yang diperoleh komponen IEE tentang kepedulian Islam terhadap bumi, terutama yang tercantum dalam hadits tentang kebersihan. Berdasarkan hadits, kegiatan pembelajaran disusun dengan menggunakan barang bekas pada LKS satu dan LKS dua. Berdasarkan kegiatannya disusun penilaian melalui rubrik, penilaian kinerja dan angket.How to Cite: Mauluah, L., Marsigit, Wangid, M. N. (2020). Elementary Math Learning Design: An Integration with Islamic Environmental Ethics in the First Grade. TARBIYA: Journal of Education in Muslim Society, 7(2), 241-251. doi:10.15408/tjems.v7i2.19975.
Evaluación agronómica y nutricional de genotipos de Chloris gayana para la ganadería Colombiana
Authors: Mejía Salazar Julian Roberto , Nieto Sierra David Felipe , Mejía Kerguelen Sergio Luis , Arango Miguel , Burbano Erazo Esteban , Higuita Corrales Iván De Jesús 
Published: May 2021

Introducción. Los forrajes de pastoreo son la principal fuente alimenticia del ganado. La variación climática reta a los productores a mantener una oferta constante de alimento, por lo que es necesario explorar otras alternativas forrajeras. Objetivo. Evaluar el comportamiento de veinte genotipos de Chloris gayana para explotaciones ganaderas. Materiales y métodos. El trabajo se desarrolló en el Centro de Investigación El Nus de la Corporación Colombiana de Investigación Agropecuaria (AGROSAVIA), San José del Nus, Antioquia, Colombia. Se empleó un diseño de bloques completos al azar, tres repeticiones y veinte tratamientos (genotipos Chloris gayana). En el análisis se utilizó un modelo mixto medidas repetidas en el tiempo, con el procedimiento GLIMMIX, cuyo efecto tiempo lo representó edad de corte. Las frecuencias de corte utilizadas fueron 21, 28, 35 y 42 días, entre agosto 2017 y octubre 2019 en época de baja y alta precipitación. Se evaluó vigor, cobertura de la especie, altura de planta, incidencia de plagas y patógenos, floración, rendimiento de materia seca (MS), proteína cruda (PC), fibra en detergente neutro y ácido (FDN, FDA), lignina (LIG), digestibilidad (DIG), hemicelulosa (HEM) y energía neta de lactancia (ENL). Resultados. Los caracteres que aportaron mayor variabilidad fueron MS, PC, FDN, FDA y DIG, se observó una asociación entre DIG, HEM y ENL. Se presentaron diferencias entre épocas y entre genotipos para la mayoría de las variables, a excepción de PC. La lignina fue la única que presentó diferencia en la triple interacción (genotipo*época*días de corte). La interacción genotipo*época mostró diferencias para FDA y LIG. El genotipo 13103 obtuvo el mayor rendimiento de MS (3032,2 kg MS ha-1). La B. Decumbens presentó el menor contenido de FDA y LIG, pero la mayor digestibilidad. Conclusiones. Los genotipos experimenales presentaron características de productividad y nutricionales similares e incluso mejores que los testigos.
Producción científica en Ciencias de la Salud de la Universidad Autónoma de Chihuahua: una revisión sistematizada
Authors: Candia Luján Ramón , Candia Sosa Kevin , Enríquez Del Castillo Aracery , Gutiérrez Cháuez Perla , Guedea Delgado Julio Cesar 
Published: May 2021

La producción científica es un parámetro importante para establecer las diferentes clasificaciones de las universidades, ya sea a nivel nacional o internacional. El objetivo del presente estudio fue analizar la producción científica de la salud de la Universidad Autónoma de Chihuahua; para esto, se llevó a cabo una revisión sistematizada de la base de datos Scopus. Se identificaron 1472 documentos de la Universidad, de los cuales 315 fueron firmados al menos por un investigador del área de la salud. Las facultades que tienen una mayor producción científica son la de Medicina y Ciencias Biomédicas y la de la Ciencias de la Cultura Física con 128 y 110 documentos, respectivamente. En el 67,6 % de los documentos hubo colaboración nacional, mientras que en el 38,1 % la colaboración fue nacional. En el 43,8 % el autor principal de los documentos fue un investigador de la Universidad. Se concluye que la producción científica del la Universidad Autónoma de Chihuahua, en general, ha aumentado en los últimos años; sin embargo, aún está lejos de los grandes productores nacionales.
Incidencia y factores de riesgo de infecciones del torrente sanguíneo asociadas a catéter central
Authors: Cabrera Diego M. , Cuba Fiorella K. , Hernández Roger , Prevost-Ruiz Yolanda 
Published: May 2021

Las infecciones del torrente sanguíneo asociadas a catéter central (ITSACC) generan gran morbimortalidad y elevados costos hospitalarios. Estudios sobre su incidencia y comportamiento clínico-epidemiológicos en la población neonatal en el Perú son escasos y no está del todo claro su impacto actual. Se realizó un estudio de cohorte prospectivo durante un año (2017-2018) en la unidad de cuidados intensivos (UCI) neonatales de un hospital público de Lima, Perú. Se incluyeron 167 pacientes (52,7% varones) con edades gestacionales entre las 24-41 semanas, se registraron 1999 días-catéter y 16 casos de ITSACC. La incidencia fue de 8/1000 días-catéter. El uso de catéter umbilical (p=0,005) y el uso de múltiples catéteres (p0,001) mostraron relación estadísticamente significativa respecto al desarrollo de ITSACC. Es necesario ampliar el estudio a otras UCI y establecer sistemas eficientes y duraderos de monitoreo que permitan la evaluación de intervenciones para reducir las ITSACC.
Ground-Motion Prediction Model Based on Neural Networks to Extract Site Properties from Observational Records
Authors: Okazaki Tomohisa , Morikawa Nobuyuki , Iwaki Asako , Fujiwara Hiroyuki , Iwata Tomoharu , Ueda Naonori 
Published: May 2021

ABSTRACTChoosing the method for inputting site conditions is critical in reducing the uncertainty of empirical ground-motion models (GMMs). We apply a neural network (NN) to construct a GMM of peak ground acceleration that extracts site properties from ground-motion data instead of referring to ground condition variables given for each site. A key structure of the model is one-hot representations of the site ID, that is, specifying the collection site of each ground-motion record by preparing input variables corresponding to all observation sites. This representation makes the best use of the flexibility of NN to obtain site-specific properties while avoiding overfitting at sites where a small number of strong motions have been recorded. The proposed model exhibits accurate and robust estimations among several compared models in different aspects, including data-poor sites and strong motions from large earthquakes. This model is expected to derive a single-station sigma that evaluates the residual uncertainty under the specification of estimation sites. The proposed NN structure of one-hot representations would serve as a standard ingredient for constructing site-specific GMMs in general regions.
Accounting for Epistemic Uncertainty in Site Effects in Probabilistic Seismic Hazard Analysis
Authors: Ulmer Kristin J. , Rodriguez-Marek Adrian , Green Russell A. 
Published: May 2021

ABSTRACT
A probabilistic seismic hazard analysis performed for rock conditions and modified for soil conditions using deterministic site amplification factors does not account for uncertainty in site effects, which can be significant. One approach to account for such uncertainty is to compute a weighted average amplification curve using a logic tree that accounts for several possible scenarios with assigned weights corresponding to their relative likelihood or confidence. However, this approach can lead to statistical smoothing of the amplification curve and possibly to decreased computed hazard as epistemic uncertainty increases. This is against the expected trend that higher uncertainty leads to higher computed hazard, thus reducing the incentive for practitioners to characterize soil properties at a site. This study proposes a modified approach in which the epistemic uncertainty is captured in a plot of amplification factors versus period. Using a case history, the proposed method is shown to improve the issue with the weighted average method for at least two oscillator periods and to yield similar results for two other periods in which the highlighted issue is less significant.
Global Navigational Satellite System Seismic Monitoring
Authors: Melbourne Timothy I. , Szeliga Walter M. , Marcelo Santillan Victor , Scrivner Craig W. 
Published: May 2021

ABSTRACTWe have developed a global earthquake deformation monitoring system based on subsecond-latency measurements from ∼2000 existing Global Navigational Satellite System (GNSS) receivers to rapidly characterize large earthquakes and tsunami. The first of its kind, this system complements traditional seismic monitoring by enabling earthquake moment release and, where station density permits, fault-slip distribution, including tsunamigenic slow slip, to be quantified as rupture evolves. Precise point position time series from globally distributed GNSS stations are continuously estimated within an Earth center of mass-fixed reference frame and streamed as local north, east, and vertical coordinates with 1 s updates and global subsecond receiver-to-positions latency. Continuous waveforms are made available via messaging exchanges to third-party users (U.S. Geological Survey, National Oceanic and Atmospheric Administration, network operators, etc.) and internally filtered to trigger coseismic offset estimation that drive downstream point-source and finite-fault magnitude and slip characterization algorithms. We have implemented a corresponding analytics system to capture ∼100 million positions generated per day per thousand global stations positioned. Assessed over one typical week using 1270 globally distributed stations, the latency of position generation at a central analysis center from time of data acquisition in the field averages 0.52 s and is largely independent of station distance. Position variances from nominal in north, east, and vertical average 8, 9, and 12 cm, respectively, predominantly caused by random-walk noise peaking in a ∼4–5min spectral band introduced by global satellite clock corrections. Solutions completeness over the week within 0.5, 1, and 2 s latency is 55%, 90%, and 99%, respectively. This GNSS analysis platform is readily scalable, allowing the accelerating proliferation of low-cost phase-tracking GNSS receivers, including those increasingly embedded in consumer devices such as smartphones, to offer a new means of characterizing large earthquakes and tsunami far more quickly than existing systems allow.