bluuebunny/crossref_metadata_2025 huggingface dataset:
Seeing Community Engagement as We Are: Student Perceptions of Service-Learning and Social Entrepreneurship Education
Authors: Clifford Joan , Emmerling Dane , Widney Evan , Hamilton Nina , Malone David
Published: January 2021

The purpose of the research was to more deeply understand undergraduate students’ perceptions of service-learning (SL) and social entrepreneurship education (SE) by examining ways in which the gender of students and their prior experiences in community engagement might shape those perceptions. We designed, administered, and analyzed the results of a survey completed by 382 undergraduate students. Results indicated that, regardless of whether the students had experiences in SL or SE, they shared similar views of the values and practices associated with each approach. However, the disaggregated data by gender showed that self-identified female students more strongly endorsed certain aspects of the community-engaged approaches in comparison with self-identified male students. These findings further emerging critiques of community engagement learning experiences that have explored how positionality impacts students’ understanding of, and approach to community engagement.

El propósito de la investigación era entender mejor la percepción de los estudiantes de pregrado acerca del aprendizaje en servicio (SL) y de la educación del empresariado social (SE), indagando en cómo el género de los estudiantes y sus experiencias previas en participación comunitaria podrían haber configurado esa percepción. Hemos diseñado, administrado y analizado los resultados de una encuesta a 382 estudiantes de pregrado. Los resultados indicaron que, independientemente de que los estudiantes tuvieran experiencias en SL o SE o no, compartían puntos de vista similares acerca de los valores y prácticas asociadas con cada enfoque. Sin embargo, los datos correspondientes a género mostraron que las estudiantes que se identificaron a sí mismas como mujeres apoyaban mucho más ciertos aspectos de la participación comunitaria que los estudiantes varones que se identificaron a sí mismos como hombres. Estos hallazgos conllevan a nuevas críticas a este tipo de experiencias, centradas en analizar la manera en que el posicionamiento de los estudiantes impacta su comprensión y perspectiva acerca de la participación comunitaria.
Test-Retest Reliability and Validity of the Service-Learning Outcomes Measurement Scale
Authors: Lau Ka Hing , Snell Robin S.
Published: January 2021

The current study evaluated the test-retest reliability and validity of the 56-item Service-Learning Outcomes Measurement Scale (S-LOMS) by inviting 122 university students to respond to items on the scale twice within a two-week period. Results indicated test-retest reliability that was moderate for eight out of 11 domains and good for the three other domains. There were intraclass correlation coefficients (ICCs) of 0.6 or above at the domain, category, and overall levels of the scale. Notably, respondents with prior service-learning experience tended to score higher on developmental outcome domains than those without prior service-learning experience. Comparisons between S-LOMS scores according to gender, age, year of study, and academic background were also made and discussed. The results indicated that S-LOMS is stable over time and that it has robust validity vis-à-vis undergraduate students in Hong Kong as the target population.

En el presente estudio se evaluó la buena fiabilidad (procedimiento test-retest) y la validez de los 56 artículos incluídos en la Escala de Medición de Resultados del Aprendizaje en Servicio (S-LOMS según sus siglas en inglés). 122 estudiantes universitarios tomaron la encuesta en dos oportunidades en un período de dos semanas. Los resultados indicaron que la fiabilidad del test-retest era moderada en ocho de las 11 áreas y buena en las otras tres. Los coeficientes de correlación intraclase (ICC) obtenidos fueron de 0,6 o más en el dominio, categoría y niveles generales de la escala. Cabe destacar que los encuestados con experiencia previa de aprendizaje en servicio tendieron a obtener una puntuación más alta en el área de resultados de desarrollo que los que no tenían ninguna. También se establecieron y discutieron comparaciones entre las puntuaciones del S-LOMS según género, edad, año de estudio y antecedentes académicos. Los resultados indicaron que el S-LOMS es estable a lo largo del tiempo y que tiene una sólida validez con respecto a los estudiantes universitarios de pregrado en Hong Kong, población seleccionada.
The Editorial Team and Peer Reviewers for Vol. 8, Issue 1 of IJRSLCE
Authors: Bowen Glenn A.
Published: January 2021

This listing recognizes members of the editorial team and peer reviewers for IJRSLCE Volume 8, Issue 1 (2020).
Different Types of Diatoms Seen in the River Narmada in India
Authors: Arushi Chawla  , Dhwani Patel  , Shivani Pandya
Published: January 2021

Aim: To determine the different types of diatoms present in the waters of River Narmada flowing through5 distinct cities of India and ending into the Arabian Sea. Different types of Diatoms were observed withchange in the course of water. Objective: The study shall assist to determine the different types of diatomspresent in the river Narmada. Materials and Method: The study does not require any special instrumentsand the technique used to extract the diatoms from the waters is also very simple to perform. In this studythe acid digestion technique is not used but the technique is slightly modified in order to prevent the damageto the walls of the diatoms. Result: Various types of diatoms were seen and the diatoms present in the watercollected from different cities of India are found to be different including the species unique to the area.Conclusion: The study describes the type of diatom present in the water of river Narmada collected fromdifferent places.
Effective Reusable Cleanroom Garments and Evaluation of Garment Life
Authors: Eaton Tim , Whyte William
Published: January 2021

Cleanroom garments are used to control the airborne dispersion of contamination from people into the cleanroom. The effectiveness of the garment in controlling the dispersion of contamination is a function of the fabric and design of garments, and test methods used to ascertain the effectiveness of garments are discussed in this article. These test methods can be used when choosing garments for use in a cleanroom but were used in this article to determine the deterioration of garments through use. Cleanroom garments were subjected to increasing numbers of decontamination cycles, which included sterilisation by gamma radiation, up to a maximum of 70. At defined number of decontamination cycles, the garment’s fabric was compared to a new fabric by visual examination, by a scanning electron microscope, and by physical tests of key performance parameters. It was concluded that the performance of the fabric remained acceptable up to 50 decontamination cycles. This conclusion was supported by the low dispersion rate of particles and microbe-carrying particles in a dispersal chamber from personnel wearing the garments. After 50 decontamination cycles, a low dispersion rate of 0.2/s of microbe-carrying particles from personnel wearing the garments was obtained and a 194-fold reduction in the microbial dispersion rate compared to cleanroom undergarments.

Key words: cleanroom garments, garment life, contamination control
Experimentelle Untersuchungen an vorgespannten Durchlaufträger-Teilsystemen zum Einfluss nicht mehr zugelassener Bügelformen auf die Querkrafttragfähigkeit/Experimental investigations on prestressed continuous beam subsystems to determine the influence of no longer permitted stirrup types on the shear capacity
Authors: Schramm Nicholas , Fischer Oliver , Scheufler Wolfgang
Published: January 2021

Zusammenfassung Aufgrund von gestiegenen Anforderungen an Bestandsbrücken, insbesondere infolge einer stetigen Zunahme der Verkehrsbeanspruchung sowie diversen Anpassungen im Nachweiskonzept, zeigen sich bei der Nachrechnung von Spannbetonbrücken häufig ausgeprägte rechnerische Defizite bezüglich der Querkrafttragfähigkeit. In der Praxis sind jedoch oftmals keine entsprechenden Schadensbilder am Bauwerk sichtbar. Diese Diskrepanz ist aktuell Gegenstand mehrerer Forschungsvorhaben. In diesem Zusammenhang stellt sich auch die Frage nach dem Einfluss von aktuell nicht mehr zugelassenen Bügelformen, sowie generell von einem geringen Querkraftbewehrungsgehalt, auf die Querkrafttragfähigkeit von Spannbetonbrücken. Hierzu wurden durch den Lehrstuhl für Massivbau der Technischen Universität München umfangreiche experimentelle Untersuchungen an insgesamt elf Spannbetonträgerausschnitten mit einem innovativen Versuchskonzept unter Anwendung der Substrukturtechnik durchgeführt. Dabei wurden Versuche zu Bügeln mit kurzen Übergreifungsstößen, einseitig offenen Bügeln mit geraden Stabenden und Steckbügeln im Stützbereich durchgeführt. Zudem wurden als Referenz Träger mit konventioneller sowie ohne Bügelbewehrung geprüft. Mithilfe quasi-kontinuierlicher faseroptischer Dehnungsmessungen konnten hierbei wichtige neue Erkenntnisse zum Einfluss der Bügelform auf das Querkrafttragverhalten gewonnen werden.
Zum Tragverhalten von geschraubten Stirnplattenstößen mit elastomerer Trennschicht/Load-carrying capacity of bolted end-plate connections with elastomeric interlayer
Authors: Nasdala Lutz , Blust Andreas , Jüngel Nikolas
Published: January 2021

Zusammenfassung Bei der Auslegung von geschraubten Stirnplattenstößen mit elastomerer Trennschicht dürfen gemäß Eurocode 3 lediglich die Flansche für eine Übertragung der Schnittgrößen berücksichtigt werden. Unsere Untersuchungen zeigen, dass auch die Stege für eine Bemessung herangezogen werden sollten. Sie tragen zu einer gleichmäßigeren Spannungsverteilung im Elastomerlager bei und erlauben somit höhere Belastungen bei gleichbleibenden Abmessungen.

Basis der FE-Analysen sind ein- und zweiachsige Zug- und Druckversuche, die das komplexe Materialverhalten der elastomeren Trennschicht erfassen. Die Übereinstimmung von Messung und Simulation ist sehr gut, was insbesondere auf das verwendete Materialgesetz zurückzuführen ist: ein nicht-linear viskoelastischer Ansatz in Kombination mit dem hyperelastischen Marlow-Modell.

Es hat sich herausgestellt, dass der Reibungskoeffizient und die Querkontraktionszahl des Elastomerlagers maßgeblich das Tragverhalten der geschraubten Stirnplattenstöße beeinflussen.
Erschütterungsschutz im Nahverkehr/Tramway induced vibrations
Authors: Tappauf Benedikt , Tappauf Ernst , Legenstein Marianne , Tappauf Clemens , Flesch Rainer
Published: January 2021

Zusammenfassung Der Erschütterungsschutz gewinnt durch die ständig dichter werdende Verbauung sowie den Ausbau der Verkehrswege und die Steigerung des Verkehrsaufkommens immer mehr an Bedeutung. Ein steigendes Schutzbedürfnis der Anrainer einerseits und zunehmend schwerere Fahrzeuge mit größeren Emissionen andererseits stellen hohe Anforderungen an den Erschütterungsschutz.

In der gegenständlichen Arbeit werden Erfahrungswerte zufolge unterschiedlicher Maßnahmen am Fahrzeug selbst, im Betrieb und an der Strecke – wie zum Beispiel elastische Schienenlagerungen, unterschiedliche Masse-Feder-Systeme und Versteifungen des Untergrunds (Impedanzplatte) – dargestellt und diskutiert. Wesentlich für die Wirksamkeit und die Wahl der richtigen Baumaßnahme ist die Steifigkeit des anstehenden Untergrunds. Während bei steifen geodynamischen Verhältnissen ein Masse-Feder-System große Wirksamkeit aufweist, müssen bei abnehmender Baugrundfestigkeit Versteifungen des Untergrunds (Impedanzplatte und Bodenaustausch) vorgesehen oder ein möglichst steifer Oberbau hergestellt werden.

Die Festlegung, welcher Oberbau unter den vorliegenden Bodenbedingungen ausgeführt werden soll, kann optimalerweise basierend auf Admittanzversuchen – gestützt auf Erfahrungen aus zahlreichen bereits ausgeführten Masse-Feder-Systemen – erfolgen. Weiterhin kann bei solchen Versuchen das Schwingungsübertragungsverhalten vom Fahrweg bis zu den Immissionspunkten in den Objekten gemessen werden. Mithilfe dieser Übertragungsadmittanzen – welche nun alle dynamischen Einflüsse der gesamten Übertragungskette (Boden, Fundament, Bauwerk, Geschoßdecke) zwischen dem Erregungspunkt und dem Immissionspunkt repräsentieren – können durch Multiplikation mit einem Kraftspektrum realitätsnahe Immissionsprognosen erstellt werden.

Auf Basis zahlreicher Messungen war es möglich, „äquivalente Kraftspektren“ unterschiedlicher Fahrzeuge zu entwickeln, welche in diesem Artikel dargestellt werden.
Effektivität in Projektteams integrierter Projektabwicklungsmodelle mit Mehr- parteienverträgen gegenüber konventionellen und partnerschaftlichen Modellen/Effectiveness in project teams of integrated project delivery models with multi-party contracts compared to conventional and partnering models
Authors: Jünger H. C. , Scharpf S.
Published: January 2021

Zusammenfassung Im Zusammenhang mit der stetigen Kritik an Bauprojekten aufgrund von Defiziten bei der Einhaltung von Projektzielen finden die im internationalen Umfeld entwickelten und bei komplexen Projekten angewendeten integrierten Projektabwicklungsmodelle mit Mehrparteienverträgen auch in Deutschland zusehends Aufmerksamkeit. Wissenschaftlich noch unzureichend untersucht ist die Frage nach den Vorteilen dieser Modelle gegenüber den konventionellen und partnerschaftlichen Formen der Projektdurchführung – es stehen Zuwächse bei der Effektivität, der Prozessstabilität und der Wirtschaftlichkeit im Raum. Der vorliegende Beitrag greift diese Frage auf und untersucht, inwieweit sich integrierte Projektabwicklungsmodelle relativ zu konventionellen und partnerschaftlichen Abwicklungsmodellen auf die Effektivität der Arbeit von Projektteams auswirken können. Er analysiert hierzu wissenschaftliche Erkenntnisse aus der Organisationspsychologie zu arbeitsorganisatorischen und psychologischen Einflüssen und leitet Einschätzungen hinsichtlich der Erzielung von Effektivitätsgewinnen ab.
Erweiterter Vergleich der Versagenswahrscheinlichkeit und -häufigkeit von Kernkraftwerken, Brücken, Dämmen und Tunneln/Extended comparison of failure probability and frequency of nuclear power plants, bridges, dams and tunnels
Authors: Proske D.
Published: January 2021

Zusammenfassung Der Nutzen und Richtigkeit probabilistischer Sicherheitsanalysen von Kernkraftwerken werden immer wieder in Frage gestellt, insbesondere nach den Ereignissen von Fukushima. Der Autor hat daher bereits früher die Mittelwerte der berechneten und der beobachteten Kernschadenshäufigkeiten im Rahmen einer Metaanalyse verglichen. Um einen Bezug zu anderen technischen Erzeugnissen herzustellen, wurde dieser Vergleich auf das Versagen von Brücken, Dämmen und Tunneln ausgeweitet. Dabei zeigte sich überall eine überraschend große Übereinstimmung der Mittelwerte. In diesem Beitrag werden zum ersten Mal die Streuungsmaße der Berechnungen und Beobachtungen mit zum Vergleich herangezogen. Die Streuungsmaße zeigen die Abweichung der Einzelwerte von den Mittelwerten. Da hierfür keine Zielwerte vorliegen, werden die Streuungen in Form von Histogrammen für Berechnungen und Beobachtungen verglichen. Auch hierbei zeigt sich wieder eine große Übereinstimmung.
Auszugverhalten von Mikrostahlfasern aus UHPC unter monoton steigender und zyklischer Belastung/Pullout behaviour of micro steel fibres of UHPC under monotonic and cyclic loading
Authors: Oettel V. , Lanwer J.-P. , Empelmann M.
Published: January 2021

Zusammenfassung Zur Erfassung des Trag- und Verformungsverhaltens von ultrahochfestem Stahlfaserbeton (UHPFRC) unter zyklischer Zugbeanspruchung wurde das Ermüdungsverhalten der einzelnen Komponenten („nackte“ Stahlfaser, faserfreier UHPC, einbetonierte Stahlfasern) untersucht. Dazu wurden zyklische Zugversuche an der „nackten“ Mikrostahldrahtfaser sowie am faserfreien UHPC mit variierenden Schwingbreiten durchgeführt und Wöhlerdiagramme aufgestellt. Durch verschiedenartige Pullout-Versuche mit unterschiedlichen Anordnungen von Mikrostahldrahtfasern im UHPC konnten wesentliche Erkenntnisse zum Auszugverhalten unter monoton steigender und zyklischer Belastung gewonnen werden.
Brennstoffzellen- Heizgeräte auf dem deutschen Markt
Authors: Wilming Wilhelm
Published: January 2021

Nach langer Entwicklungszeit sind seit etwa drei Jahren serienreife Brennstoffzellen-Heizgeräte heimischer Hersteller auf dem Markt verfügbar. Der folgende Beitrag gibt einen Überblick zum aktuellen Stand.
Bimodal Emotion Recognition Using Deep Belief Network
Authors: Jaratrotkamjorn Apichart
Published: January 2021

The emotions are very important in human daily life. In order to make the machine can recognize the human emotional state, and it can intelligently respond to need for human, which are very important in human-computer interaction. The majority of existing work concentrate on the classification of six basic emotions only. In this research work propose the emotion recognition system through the multimodal approach, which integrated information from both facial and speech expressions. The database has eight basic emotions (neutral, calm, happy, sad, angry, fearful, disgust, and surprised). Emotions are classified using deep belief network method. The experiment results show that the performance of bimodal emotion recognition system, it has better improvement. The overall accuracy rate is 97.92%.
Tecendo redes, construindo pontes: atendimento a uma família migrante na clínica de famílias do Instituto Noos
Authors: Lima Adriana Scoz da C. , Corsini Leonora F.
Published: January 2021

Neste artigo compartilhamos os desafios que vivenciamos no atendimento em terapia familiar a uma família de migrantes na Clínica Social do Instituto Noos, em São Paulo. A família, de origem boliviana, era composta de mãe e seus três filhos com idades entre 7 e 11 anos. No início do processo, os quatro moravam em um centro de acolhimento sigiloso, uma vez que a mãe havia sofrido agressões e ameaças violentas do seu ex-marido, pai dos três meninos. Acolher na nossa clínica uma família de migrantes que, naquele momento, morava em abrigo sigiloso, foi uma experiência inédita para nós, que gerou muitas interrogações e demandou muita criatividade e flexibilidade para podermos estar juntos e promover a conversação em um contexto tão especial. Ao longo do processo, pudemos refletir sobre o quanto de nossas crenças e a nossa postura, inspiradas no Construcionismo Social e nas práticas colaborativas, nos instrumentalizaram para podermos desenvolver este trabalho numa situação tão nova e desafiadora. Podemos destacar a nossa disposição em nos colocar em posição de não saber, ao mesmo tempo ampliando a escuta e a nossa disponibilidade para acolhê-los em suas dores e dilemas tão singulares e tão estrangeiros para nós.
AKSES INTERNET DAN PRESTASI HAFALAN ALQURAN
Authors: Dhahir Darman Fauzan
Published: January 2021

The activity of memorizing Quran has been a custom of Muslims since the time of Prophet Muhammad May Peace be upon Him. When the internet developed and became an inseparable part of human life, it was feared to harm the achievement of Quran memorizing. To prove the truth of that concern, this quantitative research was conducted. The research is aimed at measuring the relationship between the duration and variety of internet access with the achievements of hafidz Quran (memorizers). The data are obtained by survey, interviews, and documentation, then analyzed statistically, presented and interpreted descriptively. The results show that internet access’ duration, and its utilization, such as processes, contents, and social forms have significant and positive relationships towards the achievement of the hafidz. On the other hand, the internet use intended for fun or as an escape to release stress does not have a significant relationship with the performance of the hafidz. Keywords: internet access; internet usage; Quran memorization
HAT-P-68b: A Transiting Hot Jupiter around a K5 Dwarf Star*
Authors: Lindor Bethlee M. , Hartman Joel D. , Bakos Gáspár Á. , Bhatti Waqas , Csubry Zoltan , Penev Kaloyan , Bieryla Allyson , Latham David W. , Torres Guillermo , Buchhave Lars A. , Val-Borro Miguel de , Howard Andrew W. , Isaacson Howard , Fulton Benjamin J. , Boisse Isabelle , Santerne Alexandre , Hébrard Guillaume , Kovács Támás , Huang Chelsea X. , Dembicky Jack , Falco Emilio , Everett Mark E. , Horch Elliott P. , Lázár József , Papp István , Sári Pál
Published: January 2021

We report the discovery by the ground-based Hungarian-made Automated Telescope Network (HATNet) survey of the transiting exoplanet HAT-P-68b, which has a mass of 0.724 ± 0.043 M
J, and radius of 1.072 ± 0.012 R
J. The planet is in a circular P = 2.2984 day orbit around a moderately bright V = 13.937 ± 0.030 magnitude K-dwarf star of mass

M
⊙, and radius 0.6726 ± 0.0069 R
⊙. The planetary nature of this system is confirmed through follow-up transit photometry obtained with the Fred L. Whipple Observatory (FLWO) 1.2 m telescope, high-precision radial velocities measured using Keck I/High Resolution Echelle Spectrometer (HIRES), FLWO 1.5 m/Tillinghast Reflector Echelle Spectrograph (TRES), and Observatoire de Haute-Provence (OHP) 1.9 m/Sophie, and high-spatial-resolution speckle imaging from WIYN 3.5 m/DSSI. HAT-P-68 is at an ecliptic latitude of +3° and outside the field of view of both the NASA Transiting Exoplanet Survey Satellite primary mission and the K2 mission. The large transit depth of 0.036 mag (r band) makes HAT-P-68b a promising target for atmospheric characterization via transmission spectroscopy.
Refined Telluric Absorption Correction for Low-resolution Ground-based Spectroscopy: Resolution and Radial Velocity Effects in the O2 A-band for Exoplanets and K i Emission Lines
Authors: Kimeswenger Stefan , Rainer Manuel , Przybilla Norbert , Kausch Wolfgang
Published: January 2021

Telluric correction of spectroscopic observations is either performed via standard stars that are observed close in time and airmass along with the science target, or recently growing in importance, by theoretical telluric absorption modeling. Both approaches work fine when the telluric lines are resolved, i.e., at a spectral resolving power larger than about 10,000, and it is sufficient to facilitate the detection of spectral features at lower resolution. However, a meaningful quantitative analysis also requires the reliable recovery of line strengths. Here, we show for the Fraunhofer A-band of molecular O2 that the standard telluric correction approach fails in this at lower spectral resolutions, as an example for the general problem. Doppler-shift-dependent errors of the restored flux may arise, which can amount to more than 50% in extreme cases, depending on the line shapes of the target spectral features. Two applications are discussed: the recovery of the O2 band in the reflected light of an Earth analog atmosphere, as facilitated potentially in the future using an orbiting starshade and a ground-based extremely large telescope; and the recovery of the intrinsic ratio of the K i lines in the post-nova V4332 Sgr tracing the optical depth of the emitting region, to exemplify the relevance using present-day instrumentation. We show how one should derive correction functions for the compensation of the error in dependence of radial velocity shift, spectral resolution, and target line-profile function by use of high-resolution atmospheric transmission modeling, which has to be solved for the individual case.
Combining Transit and Radial Velocity: A Synthesized Population Model
Authors: Kunimoto Michelle , Bryson Steve
Published: January 2021

We present a framework for estimating exoplanet occurrence rates by synthesizing constraints from radial velocity and transit surveys simultaneously. We employ approximate Bayesian computation and various mass–radius (M–R) relations to explore the population models describing these surveys, both separately and in a joint fit. Using this approach, we fit a planet distribution function of the form

, with a break in the power law in mass at M

b
, to planets orbiting FGK stars with periods

days and masses

. We find that the M–R relation from Otegi et al. (2020), which lets rocky and volatile-rich populations overlap in mass, allows us to find a model that is consistent with both types of surveys. Our joint fit gives

(errors reflect 68.3% credible interval). This is nearly a factor of three higher than the break from transit-only considerations and an M–R relation without such an overlap. The corresponding planet–star mass ratio break

may be consistent with microlensing studies (

). The joint fit also requires that a fraction of

planets in the overlap region belong to the rocky population. Our results strongly suggest that future M–R relations should account for a mixture of distinct types of planets in order to describe the observed planet population.
Magnetoacoustic Waves in a Magnetic Slab Embedded in an Asymmetric Magnetic Environment. III. Applications to the Solar Atmosphere
Authors: Zsámberger Noémi Kinga , Erdélyi Róbert
Published: January 2021

Analytical and numerical modeling of the behavior of magnetohydrodynamic waves in various magnetic geometries can offer a valuable contribution to the field of solar magnetoseismology. Based on analytical results from our previous studies, here we illustrate a few solar applications of these findings concerning the propagation of magnetoacoustic waves in a magnetic slab embedded in an asymmetric environment. Bearing in mind the simplifying assumptions made, this asymmetric model incorporating external magnetic fields can be used to describe a wide variety of multilayered solar features, some of which are observable and have already been studied in solar structures. Specific potential applications are: prominences, polar plumes and their environment, magnetic bright points, and light bridges, as well as adjacent large-scale layers in the solar atmosphere (e.g., the photosphere—interface region—corona triad, or the chromosphere—transition region—corona group). In these individual cases, the appropriate dispersion relations are derived and solved. The obtained wave propagation solutions may serve (i) not just as impetus to be confirmed by high-resolution observations but (ii) also to be exploited for further diagnostic purposes by solar magnetoseismology of these frequently studied magnetic structures.
From the Fermi Blazar Sequence to the Relation between Fermi Blazars and γ-Ray Narrow-line Seyfert 1 Galaxies
Authors: Chen Yongyun , Gu Qiusheng , Fan Junhui , Wang Hongtao , Qin Shaojie , Ding Nan , Yu Xiaoling , Guo Xiaotong , Xiong Dingrong
Published: January 2021

We use the third catalog of blazars detected by Fermi/LAT (3LAC) and γ-ray narrow-line Seyfert 1 Galaxies (γ-NLSy1s) to study the blazar sequence and relationship between them. Our results are as follows. (i) There is a weak anticorrelation between synchrotron peak frequency and peak luminosity for both Fermi blazars and γ-NLSy1s, which supports the blazar sequence. However, after Doppler correction, the inverse correlation disappeared, which suggests that anticorrelation between synchrotron peak frequency and peak luminosity is affected by the beaming effect. (ii) There is a significant anticorrelation between jet kinetic power and synchrotron peak frequency for both Fermi blazars and γ-NLSy1s, which suggests that the γ-NLSy1s could fit well into the original blazar sequence. (iii) According to previous work, the relationship between synchrotron peak frequency and synchrotron curvature can be explained by statistical or stochastic acceleration mechanisms. There are significant correlations between synchrotron peak frequency and synchrotron curvature for whole sample, Fermi blazars and BL Lac objects, respectively. The slopes of the correlation are consistent with statistical acceleration. For FSRQs, LBLs, IBLs, HBLs, and γ-NLS1s, we also find a significant correlation, but in these cases the slopes cannot be explained by previous theoretical models. (iv) The slope of the relation between synchrotron peak frequency and synchrotron curvature in γ-NLS1s is larger than that of FSRQs and BL Lac objects. This result may imply that the cooling dominates over the acceleration process for FSRQs and BL Lac objects, while γ-NLS1s is the opposite.
Multiwavelength Characterization of the High-mass X-Ray Binary Population of M31
Authors: Lazzarini Margaret , Williams Benjamin F. , Durbin Meredith , Dalcanton Julianne , Antoniou Vallia , Binder Breanna A. , Eracleous Michael , Plucinsky Paul P. , Sasaki Manami , Vulic Neven
Published: January 2021

We present our analysis of high-quality high-mass X-ray binary (HMXB) candidates in M31 selected from point-source optical counterpart candidates from the Chandra-PHAT survey catalog. We fit the spectral energy distributions of optical counterpart candidates using the Bayesian Extinction and Stellar Tool. We used the best-fit luminosity, effective temperature, radius, and dust reddening for the companion stars in combination with the local star formation history, dust maps of M31, published X-ray spectral fits from XMM-Newton observations, IR colors, and Chandra X-ray hardness ratios to determine our best sample of HMXB candidates. The age distribution of the HMXB sample appears peaked between 10 and 50 Myr, consistent with findings in other nearby galaxies. Using the age distribution and mean star formation rate (SFR), we find that 80–136 HMXBs were produced per unit of SFR over the last 50 Myr and 89–163 HMXBs were produced per unit of SFR over the last 80 Myr, if we expand the assumed age limit beyond the lifetimes of single massive stars. We also calculate the HMXB production rate (HMXBs/M
⊙) over time, which ranges from 7 × 10−7 to 4 × 10−6 HMXBs/M
⊙ over the last 80 Myr, in agreement with both theoretical predictions and measured production rates in other galaxies.
GW190521 May Be an Intermediate-mass Ratio Inspiral
Authors: Nitz Alexander H. , Capano Collin D.
Published: January 2021

GW190521 is the first confident observation of a binary black hole merger with total mass

. Given the lack of observational constraints at these masses, we analyze GW190521 considering two different priors for the binary’s masses: uniform in mass ratio and source-frame total mass, and uniform in source-frame component masses. For the uniform in mass-ratio prior, we find that the component masses are

and

. The uniform in component-mass prior yields a bimodal posterior distribution. There is a low-mass-ratio mode (

) with

and

and a high-mass-ratio mode (

) with

and

. Although the two modes have nearly equal posterior probability, the maximum-likelihood parameters are in the high-mass-ratio mode, with

and

, and a signal-to-noise ratio of 16. These results are consistent with the proposed “mass gap” produced by pair-instability in supernovae. Our results differ from those published in Abbott et al. We find that a combination of the prior used and the constraints applied may have prevented that analysis from sampling the high-mass-ratio mode. An accretion flare in AGN J124942.3+344929 was observed in possible coincidence with GW190521 by the Zwicky Transient Facility. We report parameters assuming a common origin; however, the spatial agreement of GW190521 and the electromagnetic flare alone does not provide convincing evidence for the association (

).
Homologous Flaring Activity over a Sunspot Light Bridge in an Emerging Active Region
Authors: Louis Rohan Eugene , Thalmann Julia K.
Published: January 2021

Sunspot light bridges are known to exhibit a variety of dynamic and persistent phenomena such as surges, small-scale jets, etc., in the chromosphere and transition region. While it has generally been proposed that magnetic reconnection is responsible for this small-scale dynamism, persistent flaring activity lasting several hours from the same spatial location on a sunspot light bridge has rarely been reported. We combine observations from the Atmospheric Imaging Assembly and the Helioseismic Magnetic Imager on board the Solar Dynamics Observatory to investigate homologous flaring activity over a small sunspot light bridge in an emerging flux region. The homologous flares all produced broad, collimated jets including a B6.4 class flare. The jets rise at a speed of about 200 km s−1, reach projected heights of about 98 Mm, and emerge from the same spatial location for nearly 14 hrs, after which they cease completely. A nonlinear force-free extrapolation of the photospheric magnetic field shows a low-lying flux rope connecting the light bridge to a remote opposite-polarity network. The persistent flares occur as a result of the rapid horizontal motion of the leading sunspot that causes the relatively vertical magnetic fields in the adjacent umbra to reconnect with the low-lying flux rope in the light bridge. Our results indicate that the flaring ceases once the flux rope has lost sufficient twist through repeated reconnections.
Deep Optical Observations Contemporaneous with Emission from the Periodic FRB 180916.J0158+65
Authors: Kilpatrick Charles D. , Burchett Joseph N. , Jones David O. , Margalit Ben , McMillan Russet , Fong Wen-fai , Heintz Kasper E. , Tejos Nicolas , Escorial Alicia Rouco
Published: January 2021

We present deep Apache Point Observatory optical observations within seconds of radio emission from the periodic fast radio burst (FRB) 180916.J0158+65 obtained on 2020 September 3. FRB 180916.J0158+65 is located in a nearby spiral galaxy 150 Mpc away and has an “active phase” with a well-measured period of approximately 16.3 days. Targeting the FRB at the peak of its expected active phase and during a recent 30 minute observing window by the Canadian Hydrogen Intensity Mapping Experiment (CHIME) in which a radio burst was detected, we did not detect any transient optical emission at

 ≈ 24.7 mag (3σ) from 2.2 to 1938.1 s after the burst arrival time in optical bands (corrected for dispersion). Comparing our limiting magnitudes to models of a synchrotron maser formed in the circumburst environment of FRB 180916+J0158.65, we constrain scenarios where the burst energy was

erg and the circumburst density was >104 cm−3.
Prevalence of Nonradiographic Sacroiliitis in Patients With Psoriatic Arthritis: A Real-life Observational Study
Authors: Furer Victoria , Levartovsky David , Wollman Jonathan , Wigler Irena , Paran Daphna , Kaufman Ilana , Elalouf Ofir , Borok Sara , Anouk Marina , Sarbagil-Maman Hagit , Berman Mark , Polachek Ari , Matz Hagit , Flusser Gideon , Druckmann Ido , Eshed Iris , Elkayam Ori
Published: January 2021

Objective.

To establish the prevalence of nonradiographic sacroiliitis within a real-life sample of patients with psoriatic arthritis (PsA), using pelvic radiographs and magnetic resonance imaging (MRI) of sacroiliac joints (SIJs).

Methods.

This cross-sectional study included 107 consecutive adults with PsA (Classification Criteria for Psoriatic Arthritis criteria). Participants completed clinical and laboratory evaluation, pelvic radiographs scored for radiographic sacroiliitis according to the modified New York (mNY) criteria, and noncontrast MRI of SIJs, scored by the Berlin score and categorized into active sacroiliitis using the 2016 Assessment of Spondyloarthritis international Society (ASAS) criteria and the presence of structural sacroiliitis.

Results.

Radiographic sacroiliitis/mNY criteria were detected in 28.7% (n = 29), confirmed by MRI-detected structural lesions in 72.4% (n = 21). Active sacroiliitis was detected by MRI in 26% (n = 28) of patients, with 11% (n = 11) qualifying for nonradiographic sacroiliitis. Patients with radiographic and nonradiographic sacroiliitis had similar clinical characteristics, except for a longer duration of psoriasis (PsO) and PsA in the radiographic subgroup (PsO: 23.8 ± 12.5 vs 14.1 ± 11.7 yrs, P = 0.03; PsA: 12.3 ± 9.8 vs 4.7 ± 4.5 yrs, P = 0.02, respectively). Inflammatory back pain (IBP) was reported in 46.4% (n = 13) with active sacroiliitis and 27% (n = 3) with nonradiographic sacroiliitis. The sensitivity of IBP for detection of nonradiographic sacroiliitis was low (27%) and moderate for radiographic sacroiliitis (52%), whereas specificity ranged from 72% to 79% for radiographic and nonradiographic sacroiliitis, respectively.

Conclusion.

The prevalence of active sacroiliitis among a real-life population of patients with PsA was 26%. However, the prevalence of nonradiographic sacroiliitis was low (11%) compared to the radiographic sacroiliitis (28.7%) seen in patients with longer disease duration. IBP was not a sensitive indicator for the presence of early-stage sacroiliitis that was commonly asymptomatic.
Assessment of Widespread and Extraarticular Pain in Psoriatic Arthritis: A Case-control Study
Authors: Lubrano Ennio , Scriffignano Silvia , Morelli Romeo , Perrotta Fabio Massimo
Published: January 2021

Objective

A remarkable lack of detailed knowledge on pain areas in psoriatic arthritis (PsA) is present, and their clinical relevance is quite unknown. The main aim of the study was to explore pain areas in PsA, comparing them with those involved in patients with fibromyalgia (FM). In addition, a secondary aim was to investigate any possible association between pain areas and outcome measures in PsA.

Methods

This was a case-control study on patients with PsA satisfying Classification Criteria for Psoriatic Arthritis criteria and patients with FM. In all patients with PsA and FM, a body chart filled in by the patient reporting pain areas in 80 body locations was performed. The Widespread Pain Index (WPI) was performed in all patients with PsA and FM. In all patients with PsA, an assessment of disease activity, treatment target, function, and impact of disease was carried out.

Results

Fifty patients with PsA and 50 FM controls were evaluated. A significantly higher number of pain areas in the body chart and higher WPI scores were found in patients with FM when compared to patients with PsA. In PsA, the number of areas reported in the body chart significantly correlated with the Disease Activity Index for PsA, Health Assessment Questionnaire–Disability Index, and PsA Impact of Disease. Patients who showed a significantly high number of extraarticular pain areas involved were those who were not in remission/minimal disease activity, or who did not have a greater impact of disease or reduced function.

Conclusion

The main results showed that widespread and extraarticular pain was present in patients with PsA, showing that this nonarticular pain had an impact on important disease domains. The present study could contribute to an important aspect of this challenging and multifaceted disease—namely, the assessment of widespread pain.
Le rôle du franchiseur dans le développement de son réseau, une approche par les capacités dynamiques
Authors: Weigel Romain
Published: January 2021

Cet article a pour objectif de déterminer les capacités d’un franchiseur qui sont sources de l’avantage concurrentiel. L’analyse se base sur l’approche des capacités dynamiques et propose un dimensionnement hiérarchisé des capacités du métier de franchiseur et met en avant la nécessité de comprendre les dispositifs organisationnels qui sont responsables de la modification de ces capacités.
Vendre à l’international : des compétences en réseau au service des PME
Authors: Brassier Pascal
Published: January 2021

Vendre à l’étranger s’impose progressivement aux PME. Mais la littérature traite peu des compétences indispensables pour ce faire. Partant du cadre théorique du management international des PME, de l’entrepreneuriat et des réseaux sociaux, nous exposons plusieurs compétences manquantes aux PME, et montrons comment leur réseau régional peut les accompagner à l’international.
La dynamique des compétences interculturelles individuelles et collectives des prestataires de services dans l’expérience de service du client
Authors: Jerinic Zorana , Elidrissi Djamila , Loufrani-Fedida Sabrina
Published: January 2021

L’objectif de cet article est de comprendre la dynamique des compétences interculturelles individuelles et collectives des prestataires dans l’expérience de service du client. Les résultats de l’étude de cas d’une business unit française prestataire de services linguistiques qui excelle en la matière montrent qu’une articulation eff icace des deux niveaux de compétence assure la satisfaction des clients et contribue à la compétitivité de l’entreprise.
A Review of Preceptorship in Undergraduate Nursing Education: Implications for Staff Development
Authors: Letizia Marijo , Jennrich Judith
Published: January 2021

ABSTRACT

Nurse educators regularly develop clinical learning experiences for undergraduate students using the expertise of experienced RNs as preceptors. Preceptors help students develop a knowledge base and clinical skills. This article reports a literature review and summarizes the benefits of preceptorship, outlines preceptor responsibilities and qualities, and discusses the process of preceptor selection and role preparation. Suggestions for collaborative efforts regarding the preceptor experience among staff nurses, nurse educators, and staff development educators are highlighted.
A Child with COVID-19 and Immunoglobulin A Vasculitis
Authors: Hoskins Brett , Keeven Nicholas , Dang Mary , Keller Emily , Nagpal Rajeev
Published: January 2021

We describe the case of a child with progressive abdominal pain and rash admitted to a large tertiary children's hospital in the Chicago metropolitan area and subsequently found to have immunoglobulin A (IgA) vasculitis and coronavirus disease 2019 (COVID-19). This patient presented with abdominal pain, purpuric lesions, hematochezia, increasingly elevated D-dimer, and abnormal inflammatory markers on laboratory evaluation. To the best of our knowledge, this article describes the only reported pediatric case of COVID-19 associated with IgA vasculitis.

[
Pediatr Ann
. 2021;50(1):e44–e48.]
Global attractors of two layer baroclinic quasi-geostrophic model
Authors: Zhang Yanhong
Published: January 2021

We study the dynamics of a two-layer baroclinic quasi-geostrophic model. We prove that the semigroup \begin{document}$ \{S(t)\}_{t\geq 0} $\end{document} associated with the solutions of the model has a global attractor in both \begin{document}$ {{\dot H}_{p}}^1(\Omega) $\end{document} and \begin{document}$ {{\dot H}_{p}}^2(\Omega) $\end{document}. Also we show that for any viscosity \begin{document}$ \mu>0 $\end{document}, there is an open and dense set of forcing \begin{document}$ \mathcal G\subset{{\dot H}_{p}}^0(\Omega) $\end{document} such that for each \begin{document}$ G = (g_1, g_2)\in \mathcal G $\end{document}, the set \begin{document}$ S(G, \mu) \subset {{\dot H}_{p}}^4(\Omega) $\end{document} of the steady state problem is non–empty and finite.
La iglesia «devastada». La Santa Sede y los territorios incorporados a la zona franquista durante la Guerra Civil (1937-1938)
Authors: Navarro de la Fuente Santiago
Published: January 2021

Durante su misión en España entre julio de 1937 y junio de 1938, monseñor Ildebrando Antoniutti realizó distintas visitas a los territorios que el ejército franquista iba incorporando a su dominio. Las informaciones enviadas a la Santa Sede al respecto constituyen una visión muy completa de la diferente situación de la Iglesia en cada zona del país así como de sus necesidades y potencialidades. A partir de la documentación vaticana que recoge estas informaciones, el presente artículo analiza el diferente punto de partida para la reconstrucción de la Iglesia en cada región y el modo en que la Santa Sede lo abordó.
Éduquer à la condition terrestre
Authors: Pellaud Francine , Eastes Richard-Emmanuel
Published: January 2021

Si le développement durable a réussi l’exploit de s’immiscer jusqu’au sein de l’économie et que son éducation a investi la plupart des programmes scolaires, force est de constater que, près de 30 ans plus tard, extinctions massives, pollutions, disparités sociales, catastrophes écologiques et surexploitations sont notre pain quotidien. Ce résultat, contre-productif et alarmant, n’est-il pas à attribuer à un concept qui a endormi les consciences plutôt que de les réveiller ? Dès lors quelles sont les questions fondamentales qui doivent guider notre réflexion en tant que penseurs de l’éducation ? Quelle est notre place face à une urgence qui ne peut plus se satisfaire de beaux discours ?
Facebook au service d’une éducation au changement climatique en contexte de famille
Authors: Léger Michel T. , Martin Shawn
Published: January 2021

L’intégration de modes de vie écoresponsables représente un défi difficile à surmonter pour grand nombre de Canadiens. Cette étude qualitative vise à explorer l’adoption collective d’actions écologiques dans la famille, un contexte de transformation socioécologique peu examiné en recherche. Tenant compte de l’utilisation populaire des médias sociaux aujourd’hui, ce projet cherche à mieux comprendre comment une famille peut harmoniser davantage ses rapports avec l’environnement à l’aide du numérique. Pour certains auteurs, les médias sociaux numériques peuvent, en effet, influencer le choix de se comporter de façon plus écologique en exerçant une pression sociale positive pour l’action écologique. Il semble que ces outils numériques peuvent en particulier contribuer à réduire la consommation en énergie à la maison. Dans notre projet, il s’agit de voir comment Facebook peut contribuer au développement d’une écocitoyenneté familiale en permettant à des familles voulant adopter des modes de vie plus écologiques, de s’entre-aider comme communauté d’action. L’analyse descriptive d’une participation quotidienne au sein d’un groupe privé Facebook et l’analyse thématique d’entretiens d’explicitation après quatre mois de participation montrent que les actions environnementales mises en place par les familles impliquées semblent avoir persisté du début à la fin du projet. Bien que ces actions étaient relativement simples, nos résultats semblent indiquer que la participation à un réseau social virtuel peut contribuer à un plus haut niveau de conscience écologique et d’engagement envers l’environnement dans la famille, surtout chez les enfants des familles participant à ce projet.
Enjeux d’éducation aux changements climatiques auprès des communautés
Authors: Vasseur Liette
Published: January 2021

Bien que les acteurs locaux soient les premiers à subir les conséquences des changements climatiques, il ne leur est pas toujours facile de comprendre les phénomènes en cause et de faire des choix d’actions pertinents. En se basant sur des études menées au Canada et en Équateur, cet article montre à quel point il est important de connaître les besoins de formation des différentes communautés et d’adopter des approches et stratégies éducatives appropriées. Certaines approches permettent non seulement d’informer, mais aussi de favoriser l’apprentissage social, d’éclairer la prise de décision et de stimuler l’engagement. En particulier, nous proposons une approche d’adaptation aux changements climatiques basée sur les écosystèmes et la gouvernance écosystémique. Les stratégies éducatives que nous avons associées à une telle approche incluent la vulgarisation des connaissances scientifiques, la participation active des citoyens permettant le partage des savoirs locaux et le développement d’outil de visualisation sur le web.
La lecture critique des médias : une stratégie de formation en éducation relative à l’environnement
Authors: Tambellini Faustino Mariana , Ferreira Silva Rosana Louro
Published: January 2021

Cet article présente l’analyse d’une pratique de lecture critique d’un reportage télévisé qui a été développée au cours d’un atelier de formation continue des enseignant.e.s du secondaire de l’État de São Paulo au Brésil. Nous avons caractérisé les discussions entre les participant.e.s après la projection du reportage, en particulier à la lumière du courant critique de l’éducation relative à l’environnement. Au cours de leurs échanges, les enseignant.e.s ont signalé la non-neutralité de cette production médiatique et en plus d’examiner les thèmes présentés dans le reportage, les participant.e.s ont abordé de sujets n’ayant pas été traités dans le documentaire, tels que la situation politique et la crise du système économique. Nous soulignons le potentiel d’une telle activité pour promouvoir une formation continue s’inspirant des fondements d’une éducation libertaire, engagée et consciente.