bluuebunny/crossref_metadata_2025_split huggingface dataset:
Soft X-Ray Observations of Quiescent Solar Active Regions Using the Novel Dual-zone Aperture X-Ray Solar Spectrometer
Authors: Schwab Bennet D. , Sewell Robert H. A. , Woods Thomas N. , Caspi Amir , Mason James Paul , Moore Christopher 
Published: November 2020

Abstract
The Dual-zone Aperture X-ray Solar Spectrometer (DAXSS) was flown on 2018 June 18 on the NASA 36.336 sounding rocket flight and obtained the highest resolution to date for solar soft X-ray (SXR) spectra over a broad energy range. This observation was during a time with quiescent (nonflaring) small active regions on the solar disk and when the 10.7 cm radio flux (F10.7) was 75 solar flux units (1 sfu = 10–22 W m−2 Hz−1). The DAXSS instrument consists of a LASP-developed dual-zone aperture and a commercial X-ray spectrometer from Amptek that measures solar full-disk irradiance from 0.5 to 20 keV with a resolving power of 20 near 1 keV. This paper discusses the novel design of the spectrometer and the instrument characterization techniques. Additionally, the solar measurements obtained from the 2018 sounding rocket flight are analyzed using CHIANTI spectral models to fit the temperatures, emission measures, and relative elemental abundances of the solar corona plasma. The abundance of iron was found to be 35% higher than expected in the quiescent Sun’s corona suggesting either that our spectral models require additional sophistication or that the underlying atomic database may require updates. Future long-term systematic observations of this spectral range are needed to provide further insight into the sources of coronal heating through modeling the changes of relative elemental abundances during developments of active regions and solar flaring events.
Optical and Near-infrared Observations of the Nearby SN Ia 2017cbv
Authors: Wang Lingzhi , Contreras Carlos , Hu Maokai , Hamuy Mario A. , Hsiao Eric Y. , Sand David J. , Anderson Joseph P. , Ashall Chris , Burns Christopher R. , Chen Juncheng , Diamond Tiara R. , Davis Scott , Förster Francisco , Galbany Lluís , González-Gaitán Santiago , Gromadzki Mariusz , Hoeflich Peter , Li Wenxiong , Marion G. H. , Morrell Nidia , Pignata Giuliano , Prieto Jose L. , Phillips Mark M. , Shahbandeh Melissa , Suntzeff Nicholas B. , Valenti Stefano , Wang Lifan , Wang Xiaofeng , Young D. R. , Yu Lixin , Zhang Jujia 
Published: November 2020

Abstract
Supernova (SN) 2017cbv in NGC 5643 is one of a handful of Type Ia supernovae (SNe Ia) reported to have excess blue emission at early times. This paper presents extensive BVRIYJHK

s
-band light curves of SN 2017cbv, covering the phase from −16 to +125 days relative to B-band maximum light. The SN 2017cbv reached a B-band maximum of 11.710 ± 0.006 mag, with a postmaximum magnitude decline of Δm
15(B) = 0.990 ± 0.013 mag. The SN suffered no host reddening based on Phillips intrinsic color, the Lira–Phillips relation, and the CMAGIC diagram. By employing the CMAGIC distance modulus μ = 30.58 ± 0.05 mag and assuming H
0 = 72 km s−1 Mpc−1, we found that 0.73 M
⊙
56Ni was synthesized during the explosion of SN 2017cbv, which is consistent with estimates using reddening- and distance-free methods via the phases of the secondary maximum of the near-IR- (NIR-) band light curves. We also present 14 NIR spectra from −18 to +49 days relative to the B-band maximum light, providing constraints on the amount of swept-up hydrogen from the companion star in the context of the single degenerate progenitor scenario. No Paβ emission feature was detected from our postmaximum NIR spectra, placing a hydrogen mass upper limit of 0.1 M
⊙. The overall optical/NIR photometric and NIR spectral evolution of SN 2017cbv is similar to that of a normal SN Ia, even though its early evolution is marked by a flux excess not seen in most other well-observed normal SNe Ia. We also compare the exquisite light curves of SN 2017cbv with some M
ch delayed detonation models and sub-M
ch double detonation models.
A Distance Determination to the Small Magellanic Cloud with an Accuracy of Better than Two Percent Based on Late-type Eclipsing Binary Stars
Authors: Graczyk Dariusz , Pietrzyński Grzegorz , Thompson Ian B. , Gieren Wolfgang , Zgirski Bartłomiej , Villanova Sandro , Górski Marek , Wielgórski Piotr , Karczmarek Paulina , Narloch Weronika , Pilecki Bogumił , Taormina Monica , Smolec Radosław , Suchomska Ksenia , Gallenne Alexandre , Nardetto Nicolas , Storm Jesper , Kudritzki Rolf-Peter , Kałuszyński Mikołaj , Pych Wojciech 
Published: November 2020

Abstract
We present a new study of late-type eclipsing binary stars in the Small Magellanic Cloud (SMC) undertaken with the aim of improving the distance determination to this important galaxy. A sample of 10 new detached, double-lined eclipsing binaries identified from the OGLE variable star catalogs and consisting of F- and G-type giant components has been analyzed. The absolute physical parameters of the individual components have been measured with a typical accuracy of better than 3%. All but one of the systems consist of young and intermediate population stars with masses in the range of 1.4 to 3.8 M
☉. This new sample has been combined with five SMC eclipsing binaries previously published by our team. Distances to the binary systems were calculated using a surface brightness—color calibration. The targets form an elongated structure, highly inclined to the plane of the sky. The distance difference between the nearest and most-distant system amounts to 10 kpc with the line-of-sight depth reaching 7 kpc. We find tentative evidence of the existence of a spherical stellar substructure (core) in the SMC coinciding with its stellar center, containing about 40% of the young and intermediate age stars in the galaxy. The radial extension of this substructure is ∼1.5 kpc. We derive a distance to the SMC center of D
SMC = 62.44 ± 0.47 (stat.) ± 0.81 (syst.) kpc corresponding to a distance modulus (m − M)SMC = 18.977 ± 0.016 ± 0.028 mag, representing an accuracy of better than 2%.
Évaluer le coût des politiques climat-énergie à base de renouvelables. Du bon usage des modèles d’optimisation sectorielle
Authors: Finon Dominique 
Published: November 2020

Beaucoup de pays ont adopté une politique de transition bas carbone dans le secteur électrique qui est inefficiente car fondée principalement sur la promotion des énergies renouvelables (EnR) à grande échelle, à côté d’une tarification du carbone dont le rôle est totalement mineur. Dans cet article on s’intéresse aux exercices d’évaluation de ces politiques par comparaison avec des politiques qui placent toutes les technologies bas carbone sur le même plan, ce qui se fait avec des modèles complexes. Trois exercices montrent que les parts optimales des EnR à apports variables (EnRv) sont basses (au maximum 15 %), quel que soit le niveau du prix du carbone, même après prise en compte des sources de flexibilité (stockage, pilotage de la demande, intégration avec les systèmes voisins, usages intersectoriels des surplus des productions EnRv) qui rehaussent la valeur d’usage des EnRv. Mais ces résultats contrastent avec ceux d’un exercice très approfondi de l’Ademe qui, sans que soient testés des scénarios avec des hypothèses réalistes sur la flexibilité, prouveraient que le système électrique peut reposer de façon économique sur les seules EnR, en évacuant les autres technologies bas carbone dites « pilotables », dont le nucléaire. Cette comparaison met en évidence l’importance des hypothèses faites sur les diverses sources de flexibilité et les institutions nécessaires pour coordonner leur développement avec celui des EnRv, hypothèses qui expliquent les résultats en faveur des EnRv et en défaveur des technologies bas carbone pilotables.
SARS-CoV-2 Antibody Responses Are Correlated to Disease Severity in COVID-19 Convalescent Individuals
Authors: Hansen Cecilie Bo , Jarlhelt Ida , Pérez-Alós Laura , Hummelshøj Landsy Lone , Loftager Mette , Rosbjerg Anne , Helgstrand Charlotte , Bjelke Jais Rose , Egebjerg Thomas , Jardine Joseph G , Sværke Jørgensen Charlotte , Iversen Kasper , Bayarri-Olmos Rafael , Garred Peter , Skjoedt Mikkel-Ole 
Published: November 2020

Abstract
Globally, the COVID-19 pandemic has had extreme consequences for the healthcare system and has led to calls for diagnostic tools to monitor and understand the transmission, pathogenesis, and epidemiology, as well as to evaluate future vaccination strategies. In this study, we have developed novel, to our knowledge, flexible ELISA-based assays for specific detection of human SARS-CoV-2 Abs against the receptor-binding domain, including an Ag sandwich ELISA relevant for large population screening and three isotype-specific assays for in-depth diagnostics. Their performance was evaluated in a cohort of 350 convalescent participants with previous COVID-19 infection, ranging from asymptomatic to critical cases. We mapped the Ab responses to different areas on protein N and S and showed that the IgM, A, and G Ab responses against receptor-binding domain are significantly correlated to the disease severity. These assays and the data generated from them are highly relevant for diagnostics and prognostics and contribute to the understanding of long-term COVID-19 immunity.
Systematic Examination of Antigen-Specific Recall T Cell Responses to SARS-CoV-2 versus Influenza Virus Reveals a Distinct Inflammatory Profile
Authors: Law Jaclyn C , Koh Wan Hon , Budylowski Patrick , Lin Jonah , Yue FengYun , Abe Kento T , Rathod Bhavisha , Girard Melanie , Li Zhijie , Rini James M , Mubareka Samira , McGeer Allison , Chan Adrienne K , Gingras Anne-Claude , Watts Tania H , A. Ostrowski Mario 
Published: November 2020

Abstract
There is a pressing need for an in-depth understanding of immunity to SARS-CoV-2. In this study, we investigated human T cell recall responses to fully glycosylated spike trimer, recombinant N protein, as well as to S, N, M, and E peptide pools in the early convalescent phase and compared them with influenza-specific memory responses from the same donors. All subjects showed SARS-CoV-2–specific T cell responses to at least one Ag. Both SARS-CoV-2–specific and influenza-specific CD4+ T cell responses were predominantly of the central memory phenotype; however SARS-CoV-2–specific CD4+ T cells exhibited a lower IFN-γ to TNF ratio compared with influenza-specific memory responses from the same donors, independent of disease severity. SARS-CoV-2–specific T cells were less multifunctional than influenza-specific T cells, particularly in severe cases, potentially suggesting exhaustion. Most SARS-CoV-2–convalescent subjects also produced IFN-γ in response to seasonal OC43 S protein. We observed granzyme B+/IFN-γ+, CD4+, and CD8+ proliferative responses to peptide pools in most individuals, with CD4+ T cell responses predominating over CD8+ T cell responses. Peripheral T follicular helper (pTfh) responses to S or N strongly correlated with serum neutralization assays as well as receptor binding domain–specific IgA; however, the frequency of pTfh responses to SARS-CoV-2 was lower than the frequency of pTfh responses to influenza virus. Overall, T cell responses to SARS-CoV-2 are robust; however, CD4+ Th1 responses predominate over CD8+ T cell responses, have a more inflammatory profile, and have a weaker pTfh response than the response to influenza virus within the same donors, potentially contributing to COVID-19 disease.
Bioetica clinica. Amputazione dell’arto superiore a seguito di stimolazione ovarica nell’ambito di un programma FIVET
Authors: Mancini A. , Di Donna V. , Milardi D. , Giacchi E. , De Marinis L. , Di Pietro M. L. 
Published: November 2020

Viene illustrato il caso di una donna di 42 anni, che nell’ambito di una sindrome da iperstimolazione ovarica verificata durante un programma FIVET ha presentato complicanze coagulative gravi, che hanno comportato l’amputazione di un avambraccio. Risulta particolarmente importante la discussione etica del caso, che coinvolge i valori del desiderio di maternità, di salute e di vita, ma anche una riflessione sul ruolo stesso della medicina.
In particolare, ci soffermiamo su diverse interpretazioni del concetto di “terapia”, quando applicato alla fecondazione assistita, con le implicazioni sul bilancio dei rischi/benefici e sul consenso informato in questo delicato settore della medicina.
Random Matrices
Authors: Erdős László , Götze Friedrich , Guionnet Alice 
Published: November 2020

Large complex systems tend to develop universal patterns that often represent their essential characteristics. For example, the cumulative effects of independent or weakly dependent random variables often yield the Gaussian universality class via the central limit theorem. For non-commutative random variables, e.g. matrices, the Gaussian behavior is often replaced by another universality class, commonly called random matrix statistics. Nearby eigenvalues are strongly correlated, and, remarkably, their correlation structure is universal, depending only on the symmetry type of the matrix. Even more surprisingly, this feature is not restricted to matrices; in fact Eugene Wigner, the pioneer of the field, discovered in the 1950s that distributions of the gaps between energy levels of complicated quantum systems universally follow the same random matrix statistics. This claim has never been rigorously proved for any realistic physical system but experimental data and extensive numerics leave no doubt as to its correctness. Since then random matrices have proved to be extremely useful phenomenological models in a wide range of applications beyond quantum physics that include number theory, statistics, neuroscience, population dynamics, wireless communication and mathematical finance. The ubiquity of random matrices in natural sciences is still a mystery, but recent years have witnessed a breakthrough in the mathematical description of the statistical structure of their spectrum. Random matrices and closely related areas such as log-gases have become an extremely active research area in probability theory.
This workshop brought together outstanding researchers from a variety of mathematical backgrounds whose areas of research are linked to random matrices. While there are strong links between their motivations, the techniques used by these researchers span a large swath of mathematics, ranging from purely algebraic techniques to stochastic analysis, classical probability theory, operator algebra, supersymmetry, orthogonal polynomials, etc.
Gatsby, Dior e a produção do luxo na moda no século XX
Authors: Martinelli Fernanda 
Published: November 2020

A escala e a velocidade das transformações sociais no século XX promovem mudanças nos estilos de vida que reverberam nas práticas consumo. O consumo de luxo também se requalifica, sobretudo em função das guerras mundiais, e isto será discutido aqui a partir de dois referenciais: o personagem Jay Gatsby, do romance de F. S. Fitzgerald (1925), e o estilista Christian Dior, célebre por criar o new look em 1947 e transformar o sentido do luxo na moda. Por se constituírem como marcadores socioculturais de suas épocas em regiões então centrais na produção e no consumo de bens, ambos iluminam a reflexão sobre o que é suprimido e o que se amplia no consumo de luxo durante as guerras e nos períodos imediatamente seguintes.
Estudio prospectivo acerca de la precisión diagn´óstica del test inmunológico de sangre oculta en materia fecal en una única ronda para la realización de pesquisa del cáncer colorrectal en pacientes de riesgo promedio en la Argentina
Authors: Galvarini Martin 
Published: November 2020

ANTECEDENTES: El cáncer colorectal (CCR) es la segunda causa de muerte por cáncer en Argentina. Debido a su alta prevalencia es fundamental normatizar un programa de pesquisa para la prevención y detección temprana. La precisión del test de sangre oculta en materia fecal inmunológico (SOMFi) para pesquisa de CCR en población de riesgo promedio ha demostrado ser adecuada según la bibliografía internacional, no habiendo, sin embargo, información a nivel local.
OBJETIVO: Evaluar en nuestro medio la precisión diagnóstica del test de SOMFi en una única ronda para la pesquisa de CCR en pacientes de riesgo promedio.
DISEÑO: Prospectivo de precisión diagnostica.
MATERIAL Y METODO: Se incluyeron pacientes con riesgo promedio que consultaron para realizar una videocolonoscopia (VCC) por pesquisa de CCR en el Hospital Alemán de Buenos Aires, entre el 1 de Junio del 2015 y 31 Diciembre de 2017. Se excluyeron todos los pacientes con riesgo incrementado para CCR. Todos los pacientes realizaron el test de SOMFi y posteriormente la VCC. Los endoscopistas estaban ciegos para el resultado del test al momento de realizar la VCC. Se evaluó la precisión diagnóstica del test SOMFi para detectar lesiones neoplásicas avanzadas (LNA) calculando la sensibilidad (S), especificidad (E), valor predictivo positivo (VVP) y negativo (VVN), coeficiente de probabilidad positivo (CP+) y negativo (CP-). Se evaluó también la precisión para la detección de adenomas de bajo riesgo, pólipos aserrados y CCR.
RESULTADOS: Se incluyeron un total de 300 pacientes; 273 (91%) entregaron la muestra de materia fecal para realizar el test de SOMFi y completaron la VCC. La edad media de los pacientes fue de 56.9 (40-85) años y 54% fueron hombres. Del total de pacientes que realizaron ambos estudios (273), 53 pacientes (19%) presentaron al menos un adenoma de bajo riesgo, en 18 pacientes (6,59%) observamos al menos un adenoma aserrado sésil y en 21 pacientes (7,7%) al menos una lesión neoplásica avanzada (LNA). Solo 4 pacientes (1.5%) presentaron CCR.
En cuanto a la precisión diagnostica del test de SOMFi en una única ronda para detectar LNA observamos una S de 30%, E de 84%, VPP de 13% y un VPN de 94%. Para adenomas de bajo riesgo observamos una S de 13%, E de 84%, VPP de 17% , VPN de 79%. Para adenomas aserrados sésiles observamos una S de 16.7%, E de 87%, VPP de 11% y de VPN 91% . La precisión para el CCR fue la siguiente, S de 75%, E de 83%, VPP 6%, VPN 99%. No se observaron complicaciones post procedimientos.
CONCLUSIONES: La precisión diagnóstica del test de SOMFi en nuestro medio es comparable a los resultados internacionales. Sin embargo, la baja precisión observada en una única ronda realza la necesidad de realizarlo de forma anual o bianual para poder optimizar su precisión y lograr programas de pesquisa efectivos.
Desigualdade, diversidade e os termos da equidade
Authors: Alvarenga Gustavo Leite , Pimentel Ricardo 
Published: November 2020

Pelo presente trabalho investigou-se como a noção de diversidade – retratada em sua forma discreta, descontínua e estática – se relaciona com a noção de equidade que se estabelece sob a influência da anterior. Como estudo de caso, relata-se sobre uma empresa do setor elétrico brasileiro permeada por ideais que se polarizam entre questões de produtividade/eficiência e de justiça social. Por meio de uma abordagem qualitativa os pesquisadores acompanharam as atividades do Comitê de Equidade de Gênero além estabelecerem uma aproximação com outros (as) funcionários (as) da empresa. Com os dados coletados – por meio de entrevistas semi-estruturadas e pesquisa documental – realizou-se então uma Análise de Conteúdo segundo a abordagem de Bardin (2010), utilizando-se para isso o software Atlas ti 8 ®. Ao final da pesquisa percebe-se que o entendimento sobre o tema é limitado, com divergências a respeito das desigualdades para as quais os termos de equidade se referenciam em tradicionais parâmetros masculinos.
CARACTERIZAÇÃO FISIOGRÁFICA DO MUNICÍPIO DE BUJARI – AC: SUBSÍDIO AO ZONEAMENTO GEOAMBIENTAL
Authors: Ezaque Saraiva do Nascimento  , Santos Waldemir Lima dos 
Published: November 2020

Proporcionar o planejamento urbano em pequenas cidades sobre tudo quando falamos da Região Norte do Brasil, não tem sido uma tarefa simples. Considerando o fator histórico de ocupação das terras acreanas em que teve os rios como principal via de acesso e a borracha como principal economia da região, fez emergir os primeiros povoados que posteriormente se transformariam em pequenas cidades que ao longo dos anos cresceram e continuam crescendo de forma desordenada e sem planejamento. Para o ordenamento de um determinado espaço, ou seja, promover o mínimo de planejamento técnico com a manutenção do meio ambiente, utilização de recursos de forma planejada, indicação para uso especifico e ao mesmo tempo com a promoção do desenvolvimento local, se faz necessário o conhecimento mínimo dos elementos geoambientais presentes nesse espaço sujeito a transformações. Para tanto, este trabalho teve como objetivo principal realizar uma caracterização fisiográfica detalhada dos elementos físicos presentes no território do município de Bujari, como instrumento de análise e embasamento para o desenvolvimento de um futuro zoneamento geoambietal para o município. Os principais elementos físicos caracterizados tendo como recorte o perímetro municipal foram: a Geologia, Geomorfologia, Solos, Hidrografia e Uso do Solo. Todas as análises espaciais bem como o mapeamento realizado em nosso estudo, foi desenvolvido em ambiente SIG (Sistema de Informação Geográfica).
PENGARUH PENGAWASAN PIMPINAN TERHADAP PRODUKTIVITAS KERJA PEGAWAI DI UPT PENGEMBANGAN TANAMAN OBAT, NANGGUNG KABUPATEN BOGORPENGARUH PENGAWASAN PIMPINAN TERHADAP PRODUKTIVITAS KERJA PEGAWAI DI UPT PENGEMBANGAN TANAMAN OBAT, NANGGUNG KABUPATEN BOGOR
Authors: Pratama Santosa Angga , . Aminudin 
Published: November 2020

Penelitian ini bertujuan untuk mengidentifikasi pengaruh pengawasan pimpinan terhadap produktivitas kerja pegawai secara simultan pada UPT Pengembangan Tanaman Obat Kecamatan Nanggung Kabupaten Bogor. Jenis penelitian tergolong penelitian eksplanatory (explanatory research) yang dianalisis dengan pendekatan kuantitatif meliputi analisis Koefisien Korelasi (KK), Koefisien Determinasi (KD), Regresi Linier Sederhana dan Uji Hipotesis. Jumlah sampel berjumlah 32 orang responden dengan pengambilan secara purposive sampling. Teknik pengumpulan data melalui studi literatur, penyebaran kuisioner, dan observasi. Pertanyaan quisioner menggunakan skala likert. Pengawasan pimpinan sebagai variabel independent dengan indikator: penetapan standar kerja, pengukuran hasil kerja, tindakan koreksi atau perbaikan, dan umpan balik. Produktivitas kerja pegawai sebagai variabel dependent, dengan indikator: kuantitas, kualitas, ketepatan waktu dan motivasi. Hasil uji hipotesis menunjukkan adanya pengaruh positif dan signifikan pengawasan pimpinan terhadap poduktivitas kerja pegawai. Artinya, jika pengawasan pimpinan meningkat maka akan diikuti dengan peningkatan produktivitas kerja pegawai. Hasil penghitungan statistik Koefisien Determinasi (r2) atau R square serta persamaan Regresi Linier Sederhana menunjukan ada pembeda diantara variabel pengawasan pimpinan dengan variabel produktivitas dan setiap ada kenaikan dalam nilai pengawasan pimpinan maka akan menaikan pengaruh produktivitas kerja pekerja.