bluuebunny/crossref_metadata_2025_split huggingface dataset:
¿Para qué sirve la evaluación de la docencia? Un estudio exploratorio de las creencias de los estudiantes
Authors: Garcia Garduno Jose-Maria Ernesto 
Published: April 2022

El propósito de este trabajo fue explorar las creencias de los estudiantes acerca de la evaluación de la docencia, sus fines, utilidad y validez. Participaron 163 estudiantes de carreras de las Ciencias Sociales y Humanidades de una universidad pública mexicana. Los resultados del estudio indican que los estudiantes consideran que la evaluación de la docencia tiene un fin sumativo, de control y supervisión del trabajo del docente, que tiene poca utilidad y los cuestionarios de evaluación no son válidos. Asimismo, de manera secundaria consideran que los fines de la evaluación docente son de tipo formativo. Se concluye que las políticas de evaluación de la docencia vistas a través de los estudiantes, no han tenido el efecto de mejorar la calidad de la docencia. Asimismo que las creencias de los estudiantes en torno a la evaluación docente son semejantes a los hallazgos producidos por la investigación reciente que critica el uso de los cuestionarios para evaluar la docencia con el fin de elevar la calidad de la enseñanza. Se discuten los resultados.
Thinning out spectators: Did football matches contribute to the second COVID-19 wave in Germany?
Authors: Fischer Kai 
Published: April 2022

AbstractThe COVID-19 pandemic has decelerated substantial parts of economic and human interaction. This paper estimates football matches’ contribution to the spread of COVID-19 during Germany’s second infection wave in summer and autumn 2020. Exploiting the exogenous fixture schedules of matches across German counties in an event study design, we estimate that one additional match in a county on average raises daily cases by between 0.34 to 0.71 cases per 100,000 inhabitants after three weeks. Hence, this implies an increase of the seven-day incidence per 100,000 inhabitants by around three to seven percent. We do not find qualitatively different results for a subsample of German top league matches with the strictest hygiene regulations or matches with higher occupancy levels. Notably, the found effect is mediated by the incidence level at the day of the match with very few infections for matches at a seven-day incidence below 25. Using mobile phone data, we identify strong increases in the local mobility as an underlying mechanism. We finally show that the ban of away fans successfully limited the spread of COVID-19 beyond county borders. Our results alert that even outdoor mass gatherings can remarkably cause infections.
Numerical simulation of variable-order fractional differential equation of nonlinear Lane–Emden type appearing in astrophysics
Authors: Gupta Rupali , Kumar Sushil 
Published: April 2022

Abstract
This paper suggests the Chebyshev pseudo-spectral approach to solve the variable-order fractional Lane–Emden differential equations (VOFLEDE). The variable-order fractional derivative (VOFD) is defined in the Caputo sense. The proposed method transforms the problem into a set of algebraic equations that can be solved for unknowns. Few examples are discussed to exhibit the viability and effectiveness of the approach. The present study indicates the accuracy, efficiency, and powerfulness of the Chebyshev collocation method in solving the VOFD Lane–Emden equation. Error bound and convergence analysis of the method is also discussed. It is worth noticing that using lesser collocation nodes in computation is another advantage of the technique, which eventually reduces the computational cost.
Synergistic double laser beam-boosted liquid-NIR-SERS for ultralow detection of non-adsorptive polycyclic aromatic hydrocarbons in lake water
Authors: Zhang Mengya , Tian Yue , Jiao Anxin , Ma Hui , Wang Chang , Zheng Linqi , Li Shuang , Chen Ming 
Published: April 2022

Abstract
Ultrasensitive trace-detection of toxic and carcinogenic polycyclic aromatic hydrocarbons (PAHs) can ceaselessly propel the environmental surveillance in aqueous ecosystems. Due to the intrinsic nonadsorptive feature of PAHs, the promising technique of surface-enhanced Raman scattering (SERS) spectroscopy has been restricted to diverse functional ligands-based surface modifications of nano-substrates. However, it is not suitable for practical ultralow liquid analysis. Herein, we propose an extraordinary strategy to boost liquid-near infrared (NIR)-SERS activity of plasmonic Au/Ag nano-urchins (NUs) by introducing extra 808 nm laser-triggered an additional strong electromagnetic enhancement into routine 785 nm laser-Raman system. The synergistic double laser-excited NIR-SERS of colloidal Au/Ag NUs enables the Raman signals of crystal violet to be significantly enhanced, approaching a maximum of ∼34-fold increase than that of traditional bare 785 nm laser-excitation. More importantly, the improved liquid-NIR-SERS enables the in-situ detection limit of pyrene molecules in lake water to be achieved at ∼10−9 M, which is already better than many previous SERS results based on the complicated functionalized nano-substrates. The established double laser-boosted NIR-SERS can also be easily extended to the simultaneous trace-detection of three PAHs-contaminated mixtures, supporting well distinguishable capability. Undoubtedly, the present work opens a new versatile and innovative avenue for ultrasensitive NIR-SERS monitoring of nonadsorptive toxic pollutants in wastewater.
Crystal structure of 1H-1,2,3-Triazolo[4,5-b]-pyridin-4-ium nitrate, C5H5N5O3
Authors: Zhou Meng-Shu , Fu Hong-Ru 
Published: April 2022

Abstract
C5H5N5O3, orthorhombic, Pnma (no. 62), a = 13.4643(13) Å, b = 6.2866(10) Å, c = 9.1138(9) Å, V = 771.43(16) Å3, Z = 4, R

gt
(F) = 0.0517, wR

ref
(F
2) = 0.1317, T = 293 K.
Quality evaluation of gluten-free biscuits prepared with algarrobo flour as a partial sugar replacer
Authors: Lanata M. C. , Patrignani M. , Puppo M. C. , Conforti P. A. 
Published: April 2022

Abstract
Algarrobo flour is a gluten-free flour obtained by grinding the whole fruit (pods) of Prosopis chilensis. Because of its taste, this flour could be used as a sugar replacer. Besides, it can improve the protein profile, and the antioxidant and fibre content of foodstuffs. This is of special interest in gluten-free products that are generally deficient in these nutrients. In the present work a total of eleven different gluten-free biscuit formulations with Algarrobo flour and different proportions of rice flour, chickpea flour, cassava starch, and maize starch were evaluated. The effects of each ingredient were analysed and the texture, colour, total dietary fibre content, antioxidant capacity, and sensorial acceptability associated with the addition of algarrobo flour as a partial sugar replacer were studied in detail in three selected formulations. Results showed that the dietary fibre content and the antioxidant capacity increased with the addition of algarrobo flour (60 and 20%, respectively). In addition, no significant differences were found in the sensory scores of biscuits prepared with sugar or with algarrobo flour (P ≥ 0.05). It could be concluded that algarrobo flour could partially replace sugar in gluten-free biscuit formulations. Besides, its addition increases the fibre and antioxidant capacity of the product without significantly changing its optimum texture. This is a major achievement that could be the starting point for future research aimed to develop new and healthy gluten-free products.
Mechanical behavior and mechanism investigation on the optimized and novel bio-inspired nonpneumatic composite tires
Authors: Liu Bing , Xu Xianghong 
Published: April 2022

Abstract
Two novel nonpneumatic tires named Tweel-2, designed based on the commercial Tweel model, and Saddle with hyperbolic paraboloid spokes are proposed in this study. Four nonpneumatic tire samples were successfully prepared with the 3D printing technology to measure and analyze and compare their properties. The results of quasi-static compression experiments showed that with the same relative density, the vertical bearing capacity of Tweel-2 tire was 1.4 times that of Tweel tire, while the vertical bearing capacity of the saddle tire was 4 times and 2.4 times that of Tweel and honeycomb tires, respectively. The finite element simulation method was used to explore the mechanism of improvement in vertical bearing capacity and energy absorption of the Tweel-2 and saddle design. The so-called circumferential unit in Tweel-2 and honeycomb tires enhances the deformation coordination between the spokes of Tweel-2 and increases the critical bearing capacity of the spokes by shortening the length of the deformation zone, so that more external work can be consumed under the same vertical deformation. The spatial configuration of the hyperbolic paraboloid can optimize the spatial stress distribution of the saddle tire and makes sure that a bigger amount of material deforms and participates in energy absorption, thus improving the overall strain energy level of the spokes.
Longitudinal PET studies of mGluR5 in FXS using an FMR1 knockout mouse model
Authors: Afshar Sepideh , Lule Sevda , Yuan Gengyang , Qu Xiying , Pan Chuzhi , Whalen Michael , Brownell Anna-Liisa , Mody Maria 
Published: April 2022

Abstract
Fragile X syndrome (FXS) is a monogenic disorder characterized by intellectual disability and behavioral challenges. It is caused by aberrant methylation of the fragile X mental retardation 1 (FMR1) gene. Given the failure of clinical trials in FXS and growing evidence of a role of metabotropic glutamate subtype 5 receptors (mGluR5) in the pathophysiology of the disorder, we investigated mGluR5 function in FMR1 Knockout (FMR1-KO) mice and age- and sex-matched control mice using longitudinal positron emission tomography (PET) imaging to better understand the disorder. The studies were repeated at four time points to examine age- and disease-induced changes in mGluR5 availability using 3-fluoro-[18F]5-(2-pyridinylethynyl)benzonitrile ([18F]FPEB). We found that the binding potential (BP) of [18F]FPEB was significantly lower in the KO mice in mGluR5-implicated brain areas including striatum, cortex, hippocampus, thalamus, and olfactory bulb. The BP also changed with age, regardless of disorder status, increasing in early adulthood in male but not in female mice before decreasing later in both sexes. The difference in mGluR5 availability between the FMR1-KO and control mice and the change in BP in the KO mice as a function of age and sex illustrate the nature of the disorder and its progression, providing mechanistic insights for treatment design.
Hector Berlioz’s Neurophysiological Imagination
Authors: Raz Carmel 
Published: April 2022

AbstractThere is, Berlioz writes in his essay “De la musique en général” (1837), “a strange agitation in my blood circulation: my arteries beat violently … a trembling overtakes my limbs and a numbness my hands and feet, while the nerves of sight and hearing are partially paralyzed.” The composer here is not, as one might think, describing the symptoms of an opium overdose, but rather the powerful effect of “good music” on his own body. Challenging our tendency to dismiss Berlioz’s musical writings as merely overheated Romantic effusions, I argue that the remarkable medical detail presented in his arguments reveals a hitherto neglected dimension of nineteenth-century engagement with the embodied effects of music. Contextualizing Berlioz’s claims within the neurophysiology of his age, and in particular the physiological psychology of Cabanis, the anatomy of Bichat, and the acoustic theories of Lamarck, I recover the medical and scientific epistemes that motivated the composer’s assertions about the power of music to effect embodied and emotional transformation—a constellation of ideas that I term his “neurophysiological imagination.” An analysis in these terms of some of Berlioz’s major compositional innovations reveals how both his writings and his music explore an explicitly neurophysiological dimension of early Romantic listening. Specifically, I propose that Berlioz repeatedly attempted both to represent and to induce an experience that was of great interest to the artists and audiences of his day: an overpowering mental and physical response to music experienced as an embodied, neurophysiological form of the sublime.
Residuos de plaguicidas en mora (Rubus glaucus Benth.) en el Valle del Cauca, Colombia
Authors: Lagos-Alvarez Yorley Beatriz , Díaz-Ramírez Lizette Maritza , Melo-Velasco Jenny Marcela , Hurtado Bermudez Jhon Jairo 
Published: April 2022

Introducción. La mora (Rubus glaucus) es una fruta muy susceptible a la contaminación por residuos de plaguicidas en su etapa de producción. Por tal razón, los análisis de residuos de plaguicidas en esta fruta tienen importancia para promover procesos que contribuyan a asegurar su calidad y seguridad. Objetivo. Analizar la residualidad de plaguicidas en frutos de mora (Rubus glaucus) obtenidos de zonas de producción y mercados mayoristas del Valle del Cauca. Materiales y métodos. Durante el segundo semestre del 2020 y el primero del 2021 se analizaron quince muestras de dos mercados mayoristas y quince muestras de tres zonas de producción del Valle del Cauca, a través de un análisis de multiresiduos de plaguicidas por cromatografía de gases acoplado con detector selectivo de masas (GC- MSD) y cromatografía líquida con espectrometría de masa a masa (LC-MS/MS). Para esto, se empleó el método QuEChERS y, además, se hizo un análisis de ditiocarbamatos totales por generación de disulfuro de carbono (CS2). Resultados. Se encontraron ocho ingredientes activos en las zonas de producción, de los cuales cuatro sobrepasaron los límites máximos de residuos: chlorpyrifos, carbendazim, mandipropamid y difenoconazole. En los mercados mayoristas se determinaron catorce ingredientes activos, de las cuales cinco superaron los límites máximos de residuos: carbendazim, iprodiona, tebuconazole, dimethomorph y difenoconazole. Conclusión. Estos hallazgos reflejan la alta residualidad de plaguicidas en la mora lista para consumo y sugieren la necesidad de realizar procesos de seguimiento que contribuyan a asegurar la inocuidad de la fruta a lo largo de la cadena productiva.
El tópico del persidio insular San Lucas y sus referencias en la literatura
Authors: Villalobos Carlos Manuel 
Published: April 2022

El presidio San Lucas, ubicado en la isla del mismo nombre, fue fundado en el año 1873. Desde entonces, ha sido objeto de interés por diversos escritores costarricenses e incluso extranjeros. El primer relato que hace alusión a la isla se titula Un drama en el presidio de San Lucas, publicado por Manuel Argüello Mora en 1900. Sin embargo, el mayor referente literario corresponde a la novela La isla de los hombres solos (1963) de José León Sánchez. También aparece en otros relatos de este autor y en textos narrativos de escritores nacionales tales como Carlos Salazar y Adolfo Herrera. Gracias a la novela de León Sánchez, este locus horridus ha sido llevado al cine y al teatro, y ha motivado producciones literarias fuera de Costa Rica. En este artículo se propone una revisión de estas referencias y un análisis de los procedimientos discursivos.
FAST ALGORITHM FOR SOLVING A ONE-DIMENSIONAL UNCLOSED DESIRABLE NEIGHBORS PROBLEM
Authors: Kodnyanko V. A. 
Published: April 2022

Contex. The paper formulates a general combinatorial problem for the desired neighbors. Possible areas of practical application of the results of its development are listed. Within the framework of this problem, an analysis of the scientific literature on the optimization of combinatorial problems of practical importance that are close in subject is carried out, on the basis of which the novelty of the formulated problem accepted for scientific and algorithmic development is established.
Objective. For a particular case of the problem, the article formulates a one-dimensional unclosed integer combinatorial problem of practical importance about the desired neighbors on the example of the problem of distributing buyers on land plots, taking into account their recommendations on the desired neighborhood.
Method. A method for solving the mentioned problem has been developed and an appropriate effective algorithm has been created, which for thousands of experimental sets of hundreds of distribution subjects allows to get the optimal result on an ordinary personal computer in less than a second of counting time. The idea of developing the optimization process is expressed, which doubles the practical effect of optimization by cutting off unwanted neighbors without worsening the maximum value of the desirability criterion.
Results. The results of the work include the formulation of a one-dimensional unclosed combinatorial problem about the desired neighbors and an effective algorithm for its solution, which makes it possible to find one, several, and, if necessary, all the options for optimal distributions. The main results of the work can also include the concept and formulation of a general optimization combinatorial problem of desirable neighbors, which may have theoretical and practical prospects.
Conclusions. The method underlying the algorithm for solving the problem allows, if necessary, to easily find all the best placement options, the number of which, as a rule, is very large. It is established that their number can be reduced with benefit up to one by reducing the number of undesirable neighborhoods, which contributes to improving the quality of filtered optimal distributions in accordance with this criterion. The considered problem can receive prospects for evolution and development in various subject areas of the economy, production, architecture, urban studies and other spheres.
INVESTIGATION OF SEA BUCKTHORN EFFECT ON THE DEVELOPING OF QUALITY PARAMETERS OF EMULSION SOUSES
Authors: Novik A. , Farisieiev A. , Chernyshenko E. , Zhukov Y. , Zaparenko A. 
Published: April 2022

It is proposed to use the oil extracts of dried sea buckthorn fruits for technology of emulsion sauces with the aim to increase their nutritive and biological value. Applying the method of IR spectroscopy, the features of the qualitative chemical composition of dried sea buckthorn fruits, as well as its oil extracts and emulsion sauces prepared with the use of oil extracts were determined. It is established that IR spectrums of sea buckthorn fruits, as well as its oil extracts and sauces prapared with the use of oil extracts include approximately the same set of absorption bands, which belong to the following types of vibrations: stretching of hydroxyl groups into the molecules of acids, carbohydrates, flavonoids, tocopherol at a level between 3365 cm-1 and 3400 cm-1 ν (OH); at a level of 3009, 1418 cm-1 and 723 cm-1 – stretching and bending vibration of –CH double bond of cis-isomers of polyunsaturated fatty acids; at a level of 2926, 2855, 1467 cm-1 – asymmetric and symmetric, scissor stretching n (C–H) of the carbon skeleton into –CH2; at a level of 1746 cm-1 – ν (C=O) stretching of carboxylic and fatty acids. Stretching of ν (C–O) ester bonds and triglycerides are characterized by three peaks with maximums of 1238, 1163 and 1099 cm-1. The viscosity of emulsion sauces prepared with the use of oil extracts of dried sea buckthorn fruits of different concentrations was studied. It was found that the effective viscosity of emulsion sauces prepared with the use of oil extracts of dried sea buckthorn fruits at a concentration of 10% is 2.2 times higher than that of the reference sample. It is proven that applying of the powder of dried sea buckthorn in a form of oil extract as an ingredient of the recipe of mayonnaise contributes to improve its stability. It was determined that emulsion sauces prepared with the use of oil extracts of dried sea buckthorn fruits with a concentration of 10%, as close as possible to the value of the reference sample. According to the results of laboratory testing of the recipes of emulsion sauces prepared with the use of oil extracts of dried sea buckthorn fruits, the high quality of sauces according to organoleptic parameters and their compliance with the requirements of current regulations have been established. The obtained results testify to the expediency and prospects of using dried sea buckthorn fruits for the technology of emulsion sauces in order to increase their nutritive and biological value, as well as like a stabilizer and emulsifier of food systems.
INVESTIGATION OF QUALITY INDICATORS OF WHOLEMEAL INDUSTRIAL-MADE FLOUR
Authors: Marchenkov D. , Khorenzhy N. , Voloshenko O. , Zhygunov D. , Marenchenko О. , Zhurenko O. 
Published: April 2022

The article shows the benefits of consuming wholemeal products. However, the level of consumption of these products is low. The reason is primarily the low quality of products: the rough structure of the crumb, rapid hardening. Therefore, there is a need to improve the quality of bread from wholemeal flour. The indicators of quality of wholemeal flour produced by national enterprises are investigated in the work. Analysis of packaging and labeling of test samples of wholemeal flour (according to the manufacturer) showed that some of them are produced in accordance with GSTU 46.004-99 (“Wheat flour. Specifications”), and the quality of other samples is controlled by the manufacturer's own specifications. It should be noted that there are no Ukraine's standards for wholemeal wheat flour. Standard GSTU 46.004-99 (“Wheat flour. Technical conditions”) apply only to wheat graded and dark flour. It was found that the ash content of the studied samples of whole-meal flour (WMF) from wheat and spellta grain is in the range of 0.80–1.46%; paricle size: the residue on the sieve No. 067 – within 0.1–1.7%, the passage of the sieve No. 38 – within 12–34%. The influence of particle size and gluten of wheat and spelta whole-meal flour on its baking properties has been studied. It has been found increasing the volume and porosity of the bread while the particle size decreases. The largest bread volume (400–460 cm3) and porosity (67–68%) had the samples of flour with the smallest particle size (sieve residue No. 067 not more than 1 %, sieve passage No. 38 more than 15–20 %). For samples with a larger particle size (sieve passage No.38 – not more than 15-20 %), the volume of bread and its porosity decreased by 1.2–1.3 and 1.1–1.2 times, respectively. Analysis of gluten quantity and quality effect showed that a rather high quality of wholemeal bread from wheat WMF can be obtained with a crude gluten content in flour of at least 24–26% with a gluten quality of Gluten deformation index (GDI) in a range of 60–80 units. For the production of bread from spelta WMF it is recommended to use WMF with a crude gluten content of at least 30% with a gluten quality GDI in a range of 60–100 units.