bluuebunny/crossref_metadata_2025_split huggingface dataset:
Radioactive Heating and Late Time Kilonova Light Curves
Authors: Kasen Daniel , Barnes Jennifer 
Published: May 2019

Abstract
Compact object mergers can produce a thermal electromagnetic counterpart (a “kilonova”) powered by the decay of freshly synthesized radioactive isotopes. The luminosity of kilonova light curves depends on the efficiency with which beta-decay electrons are thermalized in the ejecta. Here we derive a simple analytic solution for thermalization by calculating how accumulate electrons lose energy adiabatically and via plasma interactions. The thermalization efficiency is well described by

where the timescale

is a function of the ejecta mass and velocity and the exponent

depends on the electron energies and the thermalization cross-sections. For a statistical distribution of r-process isotopes with radioactive power

and n = 1, the late time kilonova luminosity asymptotes to

and depends super-linearly on the ejecta mass,

. If a kilonova is instead powered by a single dominate isotope, we show that the late time luminosity can deviate substantially from the underlying exponential decay and the heating from the accumulation of trapped electrons eventually exceeds the instantaneous radioactivity. Applied to the kilonova associated with the gravitational wave source GW170817, these results imply that a possible steepening of the light curve at ≳7 days is unrelated to thermalization effects and instead could mark the onset of translucency in a high opacity component of ejecta. The analytic results should be convenient for estimating the properties of observed kilonovae and assessing the potential late time detectability of future events.
Complex Rotational Modulation of Rapidly Rotating M Stars Observed with TESS
Authors: Zhan Z. , Günther M. N. , Rappaport S. , Oláh K. , Mann A. , Levine A. M. , Winn J. , Dai F. , Zhou G. , Huang Chelsea X. , Bouma L. G. , Ireland M. J. , Ricker G. , Vanderspek R. , Latham D. , Seager S. , Jenkins J. , Caldwell D. A. , Doty J. P. , Essack Z. , Furesz G. , Leidos M. E. R. , Rowden P. , Smith J. C. , Stassun K. G. , Vezie M. 
Published: May 2019

Abstract
We have searched for short periodicities in the light curves of stars with T
eff cooler than 4000 K made from 2-minute cadence data obtained in Transiting Exoplanet Survey Satellite sectors 1 and 2. Herein we report the discovery of 10 rapidly rotating M dwarfs with highly structured rotational modulation patterns among 371 M dwarfs found to have rotation periods less than 1 day. Starspot models cannot explain the highly structured periodic variations that typically exhibit between 10 and 40 Fourier harmonics. A similar set of objects was previously reported following K2 observations of the Upper Scorpius association. We examine the possibility that the unusual structured light curves could stem from absorption by charged dust particles that are trapped in or near the stellar magnetosphere. We also briefly explore the possibilities that the sharp structured features in the light curves are produced by extinction by coronal gas, by beaming of the radiation emitted from the stellar surface, or by occultations of spots by a dusty ring that surrounds the star. The last is perhaps the most promising of these scenarios. Most of the structured rotators display flaring activity, and we investigate changes in the modulation pattern following the largest flares. As part of this study, we also report the discovery of 17 rapidly rotating M dwarfs with rotational periods below 4 hr, of which the shortest period is 1.63 hr.
Analysis of Meteoroid Ablation Based on Plasma Wind-tunnel Experiments, Surface Characterization, and Numerical Simulations
Authors: Helber Bernd , Dias Bruno , Bariselli Federico , Zavalan Luiza F. , Pittarello Lidia , Goderis Steven , Soens Bastien , McKibbin Seann J. , Claeys Philippe , Magin Thierry E. 
Published: May 2019

Abstract
Meteoroids largely disintegrate during their entry into the atmosphere, contributing significantly to the input of cosmic material to Earth. Yet, their atmospheric entry is not well understood. Experimental studies on meteoroid material degradation in high-enthalpy facilities are scarce and when the material is recovered after testing, it rarely provides sufficient quantitative data for the validation of simulation tools. In this work, we investigate the thermo-chemical degradation mechanism of a meteorite in a high-enthalpy ground facility able to reproduce atmospheric entry conditions. A testing methodology involving measurement techniques previously used for the characterization of thermal protection systems for spacecraft is adapted for the investigation of ablation of alkali basalt (employed here as meteorite analog) and ordinary chondrite samples. Both materials are exposed to a cold-wall stagnation point heat flux of 1.2 MW m−2. Numerous local pockets that formed on the surface of the samples by the emergence of gas bubbles reveal the frothing phenomenon characteristic of material degradation. Time-resolved optical emission spectroscopy data of ablated species allow us to identify the main radiating atoms and ions of potassium, calcium, magnesium, and iron. Surface temperature measurements provide maximum values of 2280 K for the basalt and 2360 K for the chondrite samples. We also develop a material response model by solving the heat conduction equation and accounting for evaporation and oxidation reaction processes in a 1D Cartesian domain. The simulation results are in good agreement with the data collected during the experiments, highlighting the importance of iron oxidation to the material degradation.
Excitation of Planetary Obliquities through Planet–Disk Interactions
Authors: Millholland Sarah , Batygin Konstantin 
Published: May 2019

Abstract
The tilt of a planet’s spin axis off its orbital axis (“obliquity”) is a basic physical characteristic that plays a central role in determining the planet’s global circulation and energy redistribution. Moreover, recent studies have also highlighted the importance of obliquities in sculpting not only the physical features of exoplanets but also their orbital architectures. It is therefore of key importance to identify and characterize the dominant processes of excitation of nonzero axial tilts. Here we highlight a simple mechanism that operates early on and is likely fundamental for many extrasolar planets and perhaps even solar system planets. While planets are still forming in the protoplanetary disk, the gravitational potential of the disk induces nodal recession of the orbits. The frequency of this recession decreases as the disk dissipates, and when it crosses the frequency of a planet’s spin axis precession, large planetary obliquities may be excited through capture into a secular spin–orbit resonance. We study the conditions for encountering this resonance and calculate the resulting obliquity excitation over a wide range of parameter space. Planets with semimajor axes in the range 0.3 au ≲ a ≲ 2 au are the most readily affected, but large-a planets can also be impacted. We present a case study of Uranus and Neptune, and show that this mechanism likely cannot help explain their high obliquities. While it could have played a role if finely tuned and envisioned to operate in isolation, large-scale obliquity excitation was likely inhibited by gravitational planet–planet perturbations.
TEACHING HOW TO USE A REPETITIVE SCHEDULING METHOD WHEN PLANNING A GREEN CONDOMINIUM BUILDING
Authors: Taemthong Wannawit , Chaissard Nattasit 
Published: May 2019

ABSTRACT
This paper aims to present a methodology for use in construction planning named the Repetitive Scheduling Method (RSM). Students on a graduate level construction management program can learn how to create a RSM schedule to be applied to a real project. Typically, the Critical Path Method (CPM) is used to plan general construction projects. This paper presents a case study wherein a CPM diagram is transformed into a RSM schedule for use in the construction of a green condominium. RSM is the most suitable tool for planning repetitive projects like condominium buildings, apartment complexes, or real estate development projects. It utilizes an uninterrupted flow of resource concept in order to eliminate manpower-related resource wastage. As a result, construction productivity can be improved by using the right construction planning tool on the right project. Interested graduate students researching construction engineering can apply RSM on their repetitive projects in the future.
Evaluation of micronuclei in oral mucosa of individuals exposed to ionizing radiation: a pilot study from Celaya, México
Authors: Padilla-Raygoza Nicolas , Gutiérrez María del Rocio Adame , Martínez Itza Zelene Moreno , Beltran-Campos Vicente , Delgado-Sandoval Silvia del Carmen , Garcia-Campos Maria de Lourdes , Sosa-Aquino Modesto Antonio , Cordova-Fraga Teodoro , Guzman-Cabrera Rafael 
Published: May 2019

Introduction: Occupational exposure to ionizing radiation can potentially lead to adverse health effects, including cancer and genetic defects. Genetic damage caused by radiation can be detected if micronuclei are observed. The objective of this pilot study was to detect the presence of micronuclei in cells of the oral mucosa in inidividuals occupationally exposed to ionizing radiation.Methods: We implemented a pilot case-control study in which we compared oral mucosa micronuclei in 30 medical and nursing personnel in radiology centers in Celaya, Mexico, with 30 volunteers not exposed to ionizing radiation recruited from a public University. The oral mucosa was brushed and the amount of micronuclei was quantified. Chi-square test or t-test for two proportions were used to compared ionizing radiation and genetic damage between exposed and non-exposed groups.Results: The exposed group had an average of 5.37 ± 3.49 micronuclei and the non-exposed had 0.37 ± 0.61 (P<0.01). In the exposed group, 90% of participants exhibited genetic damage compared to 6.67% in the unexposed group (P<0.05).Conclusion: In this pilot study, medical and nursing staff from radiology centers presented with higher genetic damage compared to control group. Further studies are needed to identify the prevalence of genetic damage due to occupational radiation exposure in Mexico.
“May Your Holy Inspiration Call Me in the Desert”: New Jewish and Baroque Identity in the Poetry of João Pinto Delgado
Authors: Warshawsky Matthew D. 
Published: May 2019

AbstractThe poetry of João Pinto Delgado, a Portuguese converso, adopted Baroque literary conventions to express the viewpoint of a New Christian demonstrating in Spanish a Jewish identity. This article studies the influence of the Spanish Golden Age on poems that Pinto Delgado published in France in 1627 to show how these works express a “New Jewish,” or heretofore forbidden Jewish voice. By analyzing texts that treat themes from the books of Esther, Lamentations, and Exodus, the article explores how Pinto Delgado communicated Jewish themes, regardless of his ability to live openly as a Jew. Additionally, by comparing his poetry with works of Jorge Manrique, Fray Luis de León, and Luis de Góngora, the article proposes that the Jewish perspective of Pinto Delgado coexisted with a Spanish literary one.
Poet of the Sun: Lope de Vega’s Appropriation of Apollo
Authors: Mascia Mark J. 
Published: May 2019

AbstractThis study examines the different ways in which Lope de Vega appropriates the mythological figure of Apollo throughout his lyric poetry, a topic often overlooked by scholars. Initially, in the Rimas humanas, Lope uses Apollo to serve somewhat traditional needs, such as offering praise, highlighting female beauty, or retelling the Apollo–Daphne myth. Yet, within the same Rimas, Lope begins to use Apollo in order to present himself as a poetic authority. Later, in La Filomena, Lope attacks his rivals through Apollo. Finally, in the Burguillos collection, Lope inverts standard myths involving Apollo and uses him for other functions, such as parodying Petrarchism. In sum, Lope reinvents Apollo and in some ways presents himself as his own figurative and self-styled “god” of poetry.
Guilt, Confession, and Forgiveness: From Methodology to Religious Experiencing in Paul Ricœur's Phenomenology
Authors: Jani Anna 
Published: May 2019

ABSTRACTMy approach to religious experience in Paul Ricœur's phenomenology of religion consists in the primordial hypothesis that the basic question of phenomenology can be formulated by virtue of the reality of the experienced thing. The aim of the essay is to show the way Ricœur connected the phenomenological and hermeneutic problematics of Being to the fundamental ethical dimension of phenomenological ontology, that is, the way the fundamental ontology of phenomenology essentially belongs to individual religious questioning. Based on the two poles of the investigation, I will focus on the questions of (1) how religious experiences reflect on reality and (2) how the methodology of phenomenology leads to the wider ontology of theology. According to my hypothesis, the two divergent approaches to religious experiences find their source in the phenomenological reflection on reality, and this reality, in view of the substantially nonreal experience of religiosity, urges the creation of a new ontology in the gift of revelation.
The Trinitarian Relationship of the World
Authors: Ferrarello Susi 
Published: May 2019

ABSTRACT
The article examines how phenomenology can investigate experience in a way that appears to us meaningful from a spiritual and ethical point of view. By comparing Husserl's and Nishida's experiential analysis, the article investigates the ethical experiencing of reality as a unicum detached from that validated by one's intersubjective community. Besides, the article addresses the problem of how the meaning of this experience can be reactivated within an intersubjective community through a proper understanding of its layers, including time, being, and teleology. It seems in fact that the multilayered nature of time entails an organization of ethical and psychological reality that cannot be explained by an exclusively epistemological point of view: rather, a unique form of teleology is required that bridges epistemology and ontology. Moreover, I clarify how axiological experience—by which Husserl means a specifically ethical way of processing reality—has its source in a mode of spiritual belief that we may call religious. Finally, I explain how this religious source reflects a teleological manner of experiencing time.
Quality Management as a Strategic Tool to Enhance the Relationship between Leaders’ Behavior and Lecturers’ Job Satisfaction
Authors: Jabbar Muhammad Naveed , Hussin Fauzi 
Published: May 2019

From last two decades, the Higher Education institutions of the developing countries have also realized the importance of better quality services and leadership behavior. Previous studies investigated that better quality services and leadership behavior are fundamental tools for the enhancement of satisfaction level of the university lecturers. Like other business organizations, the education sector also required to adopt the new approaches and techniques for effective leadership. Pakistan is also trying to improve as an education hub amongst all the countries in this region and focusing to render the quality of services according to the perception and expectations of the staff. The objective of this paper is to determine the intervening role of service quality management on the relationship between leadership behavior and job satisfaction. This research study based on quantitative in its nature. The lecturers of public universities in Punjab, Pakistan were a population of the study. Total 396 public university lecturers were selected as sample for the delimitation of the population from public universities and stratified random sampling technique was adopted for collection data. 15% proportionate was adopted to select the sample of the study. A survey method was used to collect the data from the respondents by questionnaire. Data was entered in sheets for analysis using smart PLS-SEM 3 (Partial Least Square). The findings of the study show that leader’s behavior has significance effect on job satisfaction whereas, service quality management has significance-mediating role on the relationship between leadership behavior and job satisfaction.
Gravidez na adolescência: perfil dos casos ocorridos no estado de Goiás de 2005 a 2015
Authors: Vidigal Geane Caroline Brito , Silva Karine Kelk , Lemes Susy Ricardo , Santos Manoel Eloy De Melo Oliveira dos 
Published: May 2019

Este estudo objetivou investigar o perfil dos nascimentos ocorridos no estado de Goiás entre 2005 e 2015, entre mães adolescentes com idades entre 10 e 19 anos. Foi realizado um estudo descritivo transversal e retrospectivo. A coleta de dados secundários ocorreu por meio de dados disponíveis no site do Departamento de Informática do Sistema Único de Saúde (Datasus). Os resultados mostraram que durante o período de 2005 a 2015, houve um total de 199.983 nascimentos entre mães com idades de 10 a 19 anos. O maior registro de nascimentos para mães adolescentes ocorreu em 2005. Foi detectado que 53% das adolescentes goiana apresentavam entre 8 e 11 anos de escolaridade. Dentre os 10 municípios goianos com os maiores taxas de nascimentos entre adolescentes, o município de Goiânia teve a maior incidência, 32.600 nascimentos entre 2005 e 2015. A maior parte das mães com idades entre 10 e 19 anos estavam respectivamente solteiras quando o parto ocorreu. 86% dessas adolescentes tiveram o período gestacional compreendido entre 37 e 41 semanas. Entre 2005 e 2015 houve também um percentual de 4% de nascimentos com crianças que apresentaram anomalia congênita.
O terceiro, comum e comunicável para a plenitude e liberdade: aspectos da pneumatologia de Joseph Moingt
Authors: Nentwig Roberto 
Published: May 2019

Este artigo traz alguns aspectos da pneumatologia de Moingt, que trata do Espírito Santo na dinâmica trinitária. Para o autor, Deus é uma existência pluripessoal: somente pode se comunicar, porque é trinitário; um Deus monolítico seria uma solidão incomunicável. O Pai e o Filho são um, comunhão possibilitada pelo Espírito, nomeado como o terceiro porque se coloca na relação entre o primeiro e o segundo, realizando o deslocamento do eu para nós. Este terceiro é um ser comum e comunicável: é comum a Cristo e ao Pai e comunicável a todas as criaturas por intermédio do Filho, agindo na história, que está grávida da presença salvífica de Cristo, até que o mundo seja a imagem divina, quando seremos tudo em todos — comunhão universal. Este mesmo Espírito é chamado de “espírito de Cristo” (Rm 8,9) e espírito de liberdade: a mesma liberdade de Cristo Jesus é agora transferida ao mundo e a Igreja. A Igreja, portadora do Espírito de Cristo, será dócil a esta presença à medida que deixar seu enrijecimento institucional, além de promover a comunhão das pluralidades até o dia da comunhão universal, que está em processo de gestação na história.
Ensino Religioso sob a perspectiva dos Direitos Humanos
Authors: Lima Adriano Sousa , Aragão Gilbraz de Souza 
Published: May 2019

A dignidade humana é princípio constitutivo do Estado democrático de direito e também fundamento dos direitos humanos. Após a Segunda Guerra Mundial, as Civilizações passaram a refletir e buscar caminhos para condições dignas ao ser humano. Foi nesse contexto que os direitos humanos ganharam um espaço privilegiado se tornando um paradigma fundamental para a educação. O presente texto tem como tema o ensino religioso sob a perspectiva dos direitos humanos. A partir da metodologia bibliográfica, é feita uma análise em literatura especializada, fundamentados na Constituição da República Federativa do Brasil e nos princípios da Legislação educacional, os autores apontam elementos fundamentais propondo que a disciplina de ensino religioso tenha como paradigma os direitos humanos, sendo comprometida com o respeito à diversidade cultural e religiosa, com o pluralismo de ideias e concepções pedagógicas, com o combate ao racismo, à misoginia, à homofobia e a intolerância. Os autores propõem ainda que a disciplina de ensino religioso assuma um sólido compromisso com os direitos da criança e do adolescente, proporcionando uma formação cidadã crítica e responsável aos estudantes. Ao final, os autores concluem: o ensino religioso que assume como paradigma os direitos humanos é essencial na construção de uma sociedade justa, livre, solidária e capaz de respeitar todas as diversidades.
Analytical River Routing with Alternative Methods to Estimate Seepage
Authors: Morel-Seytoux Hubert J. 
Published: May 2019

Knowledge of flow exchange between surface and groundwater is of great importance for use of water resources. The determination of seepage between a stream and an underlying aquifer requires an accurate estimation of the river stage and of the head in the aquifer. An approach is presented to estimate analytically river flow and stage while using the SAFE conductance to calculate the seepage. A major contribution of this article lies in the methodology for river routing with its use of a modified Linear Reservoir model. The parameter C is related to discharge based on Manning’s equation. That relation breathes into an empirical model a dynamic character. A second major contribution is to show that it is possible to simultaneously calculate river stage and aquifer head in the aquifer cell that contains the river. As a result iteration is not necessary to estimate that river cell head as river stage changes, as opposed to what is usually done in most numerical groundwater models. Iteration is still needed for the adjacent cells to the river cell. Because the influence of a change in the adjacent cell head on the river cell head is much delayed and attenuated the iteration is not sensitive to that change. A goal of this document is to show how that method can be used within a simple physically based routing procedure [1] to estimate the river stage that has a definite influence on seepage.
Causal Prediction and Forecasting
Authors: Cox Louis A. 
Published: May 2019

AbstractTime‐series forecasting models that extrapolate future values of variables from past ones are often limited by their inability to anticipate how the relation between past and future values will change if new interventions or policy changes are undertaken. Since one of the chief purposes of prediction and forecasting is to guide present choices among alternative interventions or policy changes, this limitation is crucial. It can be overcome by applying causal models consisting of networks of causal (or “structural”) equations or laws that produce the same conditional probabilities for output values given the same set of input values, no matter what policy changes or interventions are undertaken – the property ofinvariant causal prediction(ICP). This article describes the key concepts of such causal prediction and forecasting models, contrasts them with empirical time‐series forecasting methods that do not use causal modeling, explains how to construct (or “learn”) them from data, and mentions several practical applications.
Learning Causal Graph Models from Data
Authors: Tony Cox 
Published: May 2019

Abstract
Causal graph models such as causal Bayesian networks and influence diagrams are highly useful for describing how the probability distributions of some variables depend on the values of others; predicting the values of as‐yet unobserved variables from the values of observed ones; forecasting how changes in current controllable actions, decisions, or policies will change the probabilities of future outcomes; prescribing what choices to take to maximize expected utility; and evaluating the effects of past policies and interventions. Algorithms for learning such models from data are increasingly widely available. This article reviews the main concepts, applications, and methods of causal graph modeling and analysis. It discusses various meanings for “cause” and different principles for learning causal graph models from relevant data.