bluuebunny/crossref_metadata_2025_split huggingface dataset:
Compact intense extreme-ultraviolet source
Authors: Major B. , Ghafur O. , Kovács K. , Varjú K. , Tosa V. , Vrakking M. J. J. , Schütte B. 
Published: June 2021

High-intensity laser pulses covering the ultraviolet to terahertz spectral regions are nowadays routinely generated in a large number of laboratories. In contrast, intense extreme-ultraviolet (XUV) pulses have only been demonstrated using a small number of sources including free-electron laser facilities and long high-harmonic generation (HHG) beamlines. Here, we demonstrate a concept for a compact intense XUV source based on HHG that is focused to an intensity of

2
×

10

14

W

/

c
m

2

, with a potential increase up to

10

17

W

/

c
m

2

in the future. Our approach uses tight focusing of the near-infrared (NIR) driving laser and minimizes the XUV virtual source size by generating harmonics several Rayleigh lengths away from the NIR focus. Accordingly, the XUV pulses can be refocused to a small beam waist radius of 600 nm, enabling the absorption of up to four XUV photons by a single Ar atom in a setup that fits on a modest (2 m) laser table. Our concept represents a straightforward approach for the generation of intense XUV pulses in many laboratories, providing exciting opportunities for XUV strong-field and nonlinear optics experiments, for XUV-pump XUV-probe spectroscopy and for the coherent diffractive imaging of nanoscale structures.
¿Por qué los jóvenes australianos triplican el consumo de radio de los jóvenes españoles?
Authors: Espinosa-Mirabet Sílvia , Ferrer-Roca Natalia 
Published: June 2021

Desde hace aproximadamente una década, la radio en el Estado Español está notando una pérdida progresiva de penetración en la audiencia y es especialmente en la más joven donde más se nota esa desafección. En Australia (Rain, 2018) el consumo radiofónico juvenil se circunscribe casi al 80% de penetración, mientras que en España la misma fuente otorga un 28%. El objetivo de este artículo es avanzar los primeros resultados de una amplia investigación internacional que tiene por objetivo conocer por qué la penetración de la radio es tan desigual entre los jóvenes de 18 y 24 años en distintos países. Se busca además saber qué sucede en Australia y qué no en España, en relación al engagement del target joven al medio.La metodología usada, cuestionarios a jóvenes australianos y españoles y entrevistas en profundidad semiestructuradas a realizadores, periodistas y directivos de cadenas públicas de radio australianas, nos permite poder obtener las primeras conclusiones que explicarían la diferencia de los datos sobre consumo en uno y otro país.Mientras que en España los jóvenes se decantan por escuchar radiofórmulas musicales de éxitos internacionales y podcasts españoles de radio generalista, en Australia se prefieren productos autóctonos y programas con contenido hablado (no radiofórmulas) y podcast made in USA. En ambos paises, los jóvenes se dejan aconsejar sobre los contenidos sonoros que prefieren. Los amigos e Instagram son los mejores prescriptores.
Narrativas transmedia y proximidad política en la campaña electoral de Jorge Yunda Machado, Alcaldía de Quito 2019
Authors: Enríquez Cruz María José , Gómez Navas Juan Sebastián 
Published: June 2021

El estudio explora cómo se utilizó la narrativa trasnemdia para generar estrategias de proximidad en la campaña municipal de Jorge Yunda Machado a la Alcaldía de Quito 2019, y cómo éstas condicionaron la imagen del candidato, como un político «cercano y humano» permitiendo así una identificación «anti carismática» hacia la comunidad de electores.
Para ello se empleó una investigación cualitativa, empleando el análisis de contenido (denotativo y connotativo), como metodología para procesar la información obtenida de los soportes comunicacionales y entrevistas a expertos. Para el diseño del modelo de análisis, se consideró las propuestas de Canel (1999; 2008) sobre la organización y planificación de la comunicación electoral y, el aporte de Annunziata (2012), referido a la proximidad política.
Tras el análisis se concluye que la proximidad, (física y simbólica) del candidato, hizo que los electores lo percibieran como una persona común, preocupada por los problemas que afectaban a la mayoría de los ciudadanos de Quito.
Climate Change and Building Energy Consumption: A Review of the Impact of Weather Parameters Influenced by Climate Change on Household Heating and Cooling Demands of Buildings
Authors: Bazazzadeh Hassan , Nadolny Adam , Safaei Seyedeh Sara Hashemi 
Published: June 2021

The growth of urban population as the result of economic and industrial development has changed our place of living from a prosperous place to where the resources are carelessly consumed. On the other hand, long-term climate change, i.e. global warming, has had adverse impact on our resources. Certain resources are on the verge of depletion as the consequence of climate change and inconsiderate consumption of resources, unless serious measures are implemented immediately. The building sector, whose share in the municipal energy consumption is considerably high, is a key player that may successfully solve the problem. This paper aims to study the effects of climate change on the energy consumption of buildings and analyze its magnitude to increase the awareness of how construction can reduce the overall global energy consumption. A descriptive-analytical method has been applied to analyze valid models of energy consumption according to different scenarios and to interpret the conditions underlying current and future energy consumption of buildings. The results clearly show that the energy consumption in the building sector increasingly depends on the cooling demand. With that being said, we can expect the reduction of overall energy consumption of buildings in regions with high heating demands, whereas rising the energy consumption in buildings is expected in regions with high cooling demand. To conclude, the long-term climate change (e.g. global warming) underlies the increased energy consumption for the cooling demand whose share in total energy consumption of buildings much outweighs the heating demand. Therefore, to conserve our resources, urban energy planning and management should focus on working up a proper framework of guidelines on how to mitigate the cooling loads in the energy consumption patterns of buildings.
COVID-19 pandemic and construction industry: Impacts, emerging construction safety practices, and proposed crisis management
Authors: Iqbal Muzaffar , Ahmad Naveed , Waqas Muhammad , Abrar Maira 
Published: June 2021

Goal: COVID-19 has a drastic effect on world economic progress and different industries. As the main contributor to countries' economies, the construction industry faced multiple challenges due to pandemics. Therefore, it's essential to identify the impact of COVID-19 on the construction sector and develop safety practices in construction processes. This study proposed necessary construction practices and a crisis management framework needs to adopt in the COVID-19 scenario.
Design/Methodology/Approach: At the first stage, data on negative impacts on the construction industry due to the pandemic was compiled. Then, experts were invited to propose emerging safety measures and practices to improve the safety of construction employees. Lastly, crises management framework was proposed, which provides an increased capability of taking measures during and after the COVID-19 pandemic.
Results: Results showed that COVID-19 has an adverse effect on the construction sector of different developed and developing countries. Therefore, there is a need to incorporate proposed safety practices at construction sites and apply crises management framework to increase construction productivity during the pandemic.
Limitations of the investigation: This study has certain limitations for instance the availability of data regarding construction sector was limited especially about small countries whose economies are not fully documented and construction sector is not regulated. The evaluation and assessment made in this study were generally subjective and it cannot be generalized to other sectors. This work could insist on enhancing the work plan for the future to encounter the uncertain circumstances for construction industry.
Practical implications: This work will be useful for construction managers and policy makers to cope with COVID-19 and to adopt necessary safety measure for construction sector. This work also be helpful for other industry stakeholders to pinpoint risk management efforts that could be suitable for their firms. industrialists may use these research efforts to sort out the problem areas and propose an appropriate framework for industry.
Originality/value: This study will provide guidelines to construction professionals for taking necessary measures to cope with COVID-19 and to apply a crises management framework.
CONSTRUCT VALIDATION OF ENTREPRENEURIAL CHARACTER SCALE
Authors: Husna Aftina Nurul , Akmal Nur 
Published: June 2021

This article reports on the effort to test psychometric properties of the revised version of Skala Karakter Wirausaha (SK-Wira). The research aims to clarify the scale’s internal structure by examining its construct validity. Construct validity is proven through confirming the internal structure and associating the scale with relevant variables. Revised version of SK-Wira and other measures were administered to university students in Magelang and Makassar (N = 598). After completing CFA, Study 1 confirmed that SK-Wira can be used as both multidimensional scale (model 1) to measure general entrepreneurial character, and unidimensional scales (model 2) to measure specific domains separately. Both models showed good fit. In Study 2, general and specific domains of entrepreneurial character were correlated with hope of success, fear of failure, openness to experience, neuroticism, entrepreneurial intention, and entrepreneurial self-efficacy. The results accepted all proposed hypotheses. In conclusion, SK-Wira is a valid instrument to measure entrepreneurial character for psychology of entrepreneurship research.
Homotopy invariance of the cyclic homology of A
∞-algebras under homotopy equivalences of A
∞-algebras
Authors: Lapin Sergey V. 
Published: June 2021

Abstract
In the present paper, the cyclic homology functor
from the category of

A
∞

{A_{\infty}}

-algebras over any commutative
unital ring K to the category of graded K-modules is
constructed. Further, it is shown that this functor sends
homotopy equivalences of

A
∞

{A_{\infty}}

-algebras into isomorphisms
of graded modules. As a corollary, it is stated that the cyclic
homology of an

A
∞

{A_{\infty}}

-algebra over any field is isomorphic to
the cyclic homology of the

A
∞

{A_{\infty}}

-algebra of homologies for
the source

A
∞

{A_{\infty}}

-algebra.
Banach spaces of absolutely k-summable series
Authors: Sarıgöl Mehmet Ali , Agarwal Ravi P. 
Published: June 2021

Abstract
In this paper, we present a general Banach space of absolutely k-summable series using a triangle matrix operator and prove that this is a BK-space isometrically isomorphic to the space

ℓ
k

{\ell_{k}}

. We also
establish the

α
-

{\alpha-}

,

β
-

{\beta-}

, γ-duals and base of the new space.
Finally, we qualify some matrix and compact operators on the new space making use
of the Hausdorff measure of noncompactness. Our results include, as particular
cases, a number of well-known results.
Sex steroids-induced neurogenesis in adult brain: a better look at mechanisms and mediators
Authors: Abotalebi Hamideh , Ebrahimi Babak , Shahriyari Raziyeh , Shafieian Reyhaneh 
Published: June 2021

Abstract
Adult neurogenesis is the production of new nerve cells in the adult brain. Neurogenesis is a clear example of the neuroplasticity phenomenon which can be observed in most of mammalian species, including human beings. This phenomenon occurs, at least, in two regions of the brain: the subgranular zone of the dentate gyrus in hippocampus and the ventricular zone of lateral ventricles. Numerous studies have investigated the relationship between sex steroid hormones and neurogenesis of adult brain; of which, mostly concentrated on the role of estradiol. It has been shown that estrogen plays a significant role in this process through both classic and non-classic mechanisms, including a variety of different growth factors. Therefore, the objective of this review is to investigate the role of female sex steroids with an emphasis on estradiol and also its potential implications for regulating the neurogenesis in the adult brain.
Differential positive sequence power angle-based microgrid feeder protection
Authors: Ansari Salauddin , Gupta Om Hari 
Published: June 2021

Abstract
Integration of distribution generation (DG) makes the growth of the microgrid protection scheme very challenging issues. Researchers from all over the world continuously are doing hard work for developing the microgrid protection schemes. A differential positive sequence power angle (DPSPA) based microgrid protection scheme is proposed in this paper using positive sequence (PS) components of voltages and currents. The DPSPA for the feeder is calculated considering both ends of voltage and current signal information, when it is more than threshold, internal fault is reported otherwise, it is an external fault. Taking into consideration the varying operational modes of the microgrid, variations in DG penetration, and variations in fault variables namely fault types, and fault locations, the proposed protection scheme is verified on a modified IEEE-13 bus feeder. Moreover, to test the robustness and efficacy of the suggested scheme, various non-faulty events including induction motor starting, non-linear loading, load switching, capacitor switching, and section cutoff have been conducted. The proposed scheme is also verified for external faults and it is found that it continues to be stable for the external faults. The findings exhibit this proposed scheme, which is based on DPSPA, can successfully protect the microgrid under changing operating conditions.
Deep impact of superficial skin inking: acoustic analysis of underlying tissue
Authors: Carlson Craig S. , Postema Michiel 
Published: June 2021

Abstract

Background: Skin tattoos are a common decoration, but profound scientific study whether the presence of a skin tattoo alters the acoustic response from superficial tissue, and therefore from underlying tissue, was previously lacking. Any image aberrations caused by tattoo presence may have been thought negligible, yet empirically found artifacts in brightness-mode images of tattooed skin suggest otherwise. This study investigated the nature of these artifacts theoretically and experimentally in extremely simplified cases of perfectly flat and homogenous layered media and in tattooed pork.

Methods: Theory was derived for computing the acoustic response from horizontally and vertically layered media containing a thin inked layer. Experiments were performed in vitro. Artificial and pork skin were tattooed, attached to phantom material, and sonicated with a 13–6-MHz probe. The speed of sound of these materials was determined, and the perceived refraction angles was measured.

Results: The measured speeds of sound of tattooed materials were higher than those of their uninked counterparts. The presence of tattoo ink was found to have increased the linear acoustic attenuation by 1 dB/cm. This value is negligible for typical tattoos of only few millimeters. The perceived critical refraction angles of adjacent materials could be detected, and their corresponding speeds of sound were quantified. These coincided with values derived from theory.

Conclusion: The ratio of speeds of sound of adjacent materials was shown to create distinct highlights in brightness-mode images. The artifacts observed in in vitro and in vivo brightness-mode scans were explained from near-vertical transitions between areas of different sound speed. This is the first study correlating so-called critical refraction highlighting with speed-of-sound information. In addition, it was found that phantom material is a room-temperature acoustic alternative for experiments on live human skin. In summary, the presence of superficial tattoos has a small but quantifiable effect on the acoustic response from deeper tissues.
Altered endocannabinoid-dynamics in craniopharyngioma patients and their association with HPA-axis disturbances
Authors: Auer Matthias K , Gebert Dorothea , Biedermann Sarah V , Bindila Laura , Stalla Günter , Reisch Nicole , Kopczak Anna , Fuss Johannes 
Published: June 2021

Objective
Patients with craniopharyngioma (CP) frequently suffer from morbid obesity. Endocannabinoids (ECs) are involved in weight gain and rewarding behavior but have not been investigated in this context.

Design
Cross-sectional single-center study.

Methods
Eighteen patients with CP and 16 age- and sex-matched controls were included. Differences in endocannabinoids (2-arachidonoylglycerol (2-AG) and N-arachidonoylethanolamine (AEA)) and endocannabinoid-like molecules (oleoyl ethanolamide (OEA), palmitoylethanolamide (PEA), and arachidonic acid (AA) were measured at baseline and following endurance exercise. We further explored ECs-dynamics in relation to markers of HPA-axis activity (ACTH, cortisol, copeptin) and hypothalamic damage.

Results
Under resting conditions, independent of differences in BMI, 2-AG levels were more than twice as high in CP patients compared to controls. In contrast, 2-AG and OEA level increased in response to exercise in controls but not in CP patients, while AEA levels decreased in controls. As expected, exercise increased ACTH and copeptin levels in controls only. In a mixed model analysis across time and group, HPA measures did not provide additional information for explaining differences in 2-AG levels. However, AEA levels were negatively influenced by ACTH and copeptin levels, while OEA levels were negatively predicted by copeptin levels only. There were no significant differences in endocannabinoids depending on hypothalamic involvement.

Conclusion
Patients with CP show signs of a dysregulated endocannabinoid system under resting conditions as well as following exercise in comparison to healthy controls. Increased 2-AG levels under resting conditions and the missing response to physical activity could contribute to the metabolic phenotype of CP patients.
Redes sociales, agenda noticiosa y línea editorial durante hechos violentos de las protestas de 2017 en Venezuela
Authors: Flores Irama 
Published: June 2021

El estudio giró en torno a dar respuestas reflexivas a las siguientes preguntas ¿En qué medida los temas noticiosos se retoman o no en la agenda noticiosa desde el punto de vista del periodismo durante las protestas de 2017 en Venezuela? ¿Qué tipo de géneros periodísticos utilizaron los medios para tratar los hechos difundidos en primera instancia por las redes sociales? y ¿Qué papel desempeñó el periodismo en el resguardo de la dignidad humana y la forma en que se divulgaron los hechos catalogados como violentos y con víctimas fatales? A los diarios el Universal y El Nacional, en su versión digital, se les aplicó fichas de precisión en las noticias relacionadas a 7 hechos con víctimas fatales de las protestas. Entre las conclusiones resaltan que en algunas informaciones divulgadas por estos periódicos, se citaron algunos tuits, colgaron fotos y videos que habían circulado en las redes; además en algunos de los casos estudiados, estos medios incurrieron en difundir videos y fotografías de los hechos, que reproducían el momento en el cual las víctimas fallecían; cumpliendo una agenda noticiosa sensacionalista, comercial y de irrespeto.
Fotografía y comunicación: un espejo, una imagen, un ojo
Authors: Múnera Beatriz 
Published: June 2021

La humanidad ha estado mediada por cambios de paradigmas que han provocado nuevos caminos, tanto en la comunicación como en la percepción individual y colectiva, o en las maneras de narrar para pensar y contar la sociedad.
Se modifica nuestra actitud ante perturbaciones tan rotundas como la que ahora vivimos con la pandemia provocada por la covid-19. Esta situación anómala entraña metamorfosis en la mentalidad de la época, de los valores que hasta ahora han formado una visión particular de la realidad.
Las fotografías, como documento social que son, tienen su propia narrativa comunicativa y son contribuciones a la historia y a la memoria (Múnera y Chaves, 2019). Una fotografía es siempre un recuerdo, una remembranza y, como ella, es frágil, se extravía, se desvanece, se pierde.
Hoy las imágenes nos reclaman una interpretación para comprender lo que nos narran; de ahí su gran poder comunicativo y su importancia para construir la realidad. Hemos hecho imágenes para testificar los hechos y para evocar las ausencias. ¿Pero qué ocupaba el lugar de la fotografía antes que ella? Siempre se ha dicho que el grabado, la pintura, el dibujo, pero una respuesta también podría ser la memoria, en la que se nos puede presentar como un espejo, como una imagen, como un ojo.
Esta reflexión alrededor de la fotografía en la docencia y su lugar en medio del confinamiento por la pandemia surge como una preocupación frente a su papel para la gestión de la vida personal y social, y sobre cómo va a significar los hechos.
Utility of Inflammatory Markers in Hospitalized Children With Skin Erythema
Authors: Harper Beth D. , Marcus Carolyn H. , Burke Natalie , Kawai Kosuke , Mansbach Jonathan M. 
Published: June 2021

BACKGROUND:There is overlap in the clinical presentations of superficial skin infections (eg, cellulitis) and deeper infections (eg, osteomyelitis). Inflammatory markers are frequently obtained in hospitalized patients with cellulitis. However, it is unknown whether inflammatory markers discriminate between superficial and deeper infections.METHODS:We performed a retrospective review of children hospitalized with erythema on the skin and diagnoses of cellulitis, bursitis, myositis, osteomyelitis, and/or tenosynovitis. Patients were grouped into superficial infection (cellulitis and bursitis) and deeper infection (myositis, tenosynovitis, osteomyelitis). We compared C-reactive protein (CRP) and erythrocyte sedimentation rate (ESR) values between the two groups and constructed receiver operating characteristic curves to determine optimal cutoff values.RESULTS:Among 168 children hospitalized with skin erythema, 122 patients had superficial and 46 patients had deeper infections. Mean CRP and ESR were significantly higher in patients with deeper infections (CRP: 8.3 [±9.6] mg/dL versus 2.8 [±3.5] mg/dL; P &lt; .001; ESR: 48.3 [±28.6] mm/h versus 21.8 [±16.0] mm/h; P &lt; .001). Neither WBC nor fever was significantly different between groups. CRP ≥2 mg/dL and ESR ≥30 mm/h were associated with deeper infections (CRP: odds ratio: 4.77; 95% confidence interval: 2.24–10.15; ESR: odds ratio: 7.93; 95% confidence interval: 3.46–17.67). When CRP and ESR were below these cutoffs, the negative predictive value was 89%.CONCLUSIONS:Among patients presenting with skin erythema, CRP ≥2 mg/dL and ESR ≥30 mm/hr were significantly associated with deeper infection, whereas values below these cutoffs were reassuring against deeper infection. Future study of inflammatory markers in skin and soft tissue infections may help develop tailored testing strategies.