bluuebunny/crossref_metadata_2025 huggingface dataset:
Mathieu-state reordering in periodic thermodynamics
Authors: Diermann Onno R.
Published: September 2021

A periodically driven, moderately anharmonic oscillator constitutes an ideal model system for investigating quantum resonances, which are amenable to a quantum pendulum approximation. In the present paper, I study the quasi-stationary Floquet-state occupation probabilities which emerge when such a resonantly driven system is coupled to a heat bath. It is demonstrated that the Floquet state which is associated with the ground state of the pendulum turns into an effective ground state, carrying the highest population in the strong-driving regime. Moreover, the population of this effective Floquet ground state can even exceed that of the undriven system’s true ground state at the same bath temperature. These effects can be optimized by suitably engineering the properties of the bath.
Representaciones sociales de huertos escolares: Hacia la construcción de proyectos educativos desde la pedagogía crítica
Authors: Montiel Sánchez César Enrique
Published: September 2021

Los huertos escolares han promovido la enseñanza de contenidos curriculares, científicos, culturales y de salud; la producción de alimentos y el desarrollo de valores ecológicos y colaborativos. Mediante la integración y sistematización de información recabada en conversatorios, entrevistas semiestructuradas y observación participante, esta investigación analizó las Representaciones Sociales de huertos escolares de seis docentes y cinco directores pertenecientes a siete escuelas primarias, así como de tres personas de una instancia gubernamental del ámbito educativo en Tabasco, México. Los resultados muestran dos representaciones: una enfatiza a los huertos como medios para la formación escolar y la otra los concibe más como espacios para producir alimentos. Se concluye que las experiencias personales, las interacciones sociales, el acceso a información y los contextos socioculturales específicos de la entidad han configurado estas representaciones. Por ello, dialogarlas desde la pedagogía crítica permitirá tomar acuerdos entre las dependencias que diseñan el proyecto y quienes lo implementan.
Disputas discursivas. Ideas sobre la libertad en los desembarcos iniciales del movimiento neoliberal en Argentina
Authors: De Büren María Paula
Published: September 2021

A mediados del siglo XX en una superficie histórica signada por disputas propias de la Guerra Fría; integrantes de Mont Pèlerin Society, con objeto de dar difusión a entramados conceptuales destinados a dar batalla a perspectivas y modelos que -en algún grado- permiten la legitimación de demandas obreras y entorpecen procesos de extracción de plusvalía, crean diversos institutos a lo largo de América Latina y el globo. Uno de ellos es, en el caso argentino, el Centro de Difusión de la Economía Libre (CDEL). El trabajo que presentamos a continuación releva los autores cuya obra ha sido difundida en la publicación periódica que editase dicho centro, así como, su procedencia institucional, el carácter de tales instituciones y la posición jerárquica que los mismos ocupaban en las entidades de origen. Ello con objeto de adentrarnos, a través del abordaje de un caso concreto, en el estudio del funcionamiento y las estrategias desplegadas por quienes se nucléan alrededor de Mont Pèlerin Society con objeto de dar batalla en el plano discursivo a opciones políticas, económicas y sociales antagónicas.
Effect of Aged Binder Distribution on the Fracture Tolerance of Asphalt Mixtures with Reclaimed Asphalt Pavement
Authors: Yan Yu , Hernando David , Park Bongsuk , Tebaldi Gabriele , Roque Reynaldo
Published: September 2021

This study investigated the effect of the distribution of aged binder from reclaimed asphalt pavement (RAP) on the fracture tolerance of recycled asphalt mixtures. Two RAP sources (one coarse, one fine), one virgin polymer-modified asphalt binder, and four RAP contents (0 %, 20 %, 30 %, and 40 %) were used to produce a total of seven mixtures. Fracture tolerance was assessed in terms of fracture energy density (FED) at three levels: binder, interstitial component (IC) (composed of effective binder and fine aggregate fraction), and mixture. Binder fracture energy tests were conducted to measure the FED of blends of virgin and recovered RAP binder. IC direct tension tests were employed to determine the IC FED. Finally, Superpave indirect tensile fracture tests were performed to obtain the FED of RAP mixtures. FED decreased with increasing RAP content at the three levels (binder, IC, and mixture). More importantly, IC and mixture exhibited almost identical FED reductions in relative terms, while the reduction was less significant at binder level. This finding indicates that the full blending scenario artificially created at the binder level did not occur at IC and mixture levels. Furthermore, the coarse RAP yielded greater FED than the fine RAP, which substantiates that RAP gradation controls the distribution of RAP binder in recycled mixtures. Consequently, the lower content of aged RAP binder in the IC portion for mixtures with the coarser RAP resulted in better fracture tolerance. The application of a newly developed guideline for determining the maximum allowable RAP content in recycled mixtures confirmed that the coarser RAP used in this study allows for a greater RAP content than the finer RAP despite the stiffer RAP binder.
Perceptual Fading of a Stabilized Cortical Image: Replication in the Undergraduate Classroom
Authors: Massa Nicole B. , Deck Jacob H. , Grubb Michael A.
Published: September 2021

Prolonged exposure to a stimulus causes desensitization of cortical neurons and results in perceptual changes. One example of this phenomenon is contrast adaptation, in which perceived differences between light and dark regions of a stimulus decrease. Blakemore, Muncey, and Ridley reported evidence for the “perceptual fading of a stabilized cortical image” in a 1971Naturepaper. Our goal was to replicate their second experiment, in which adaptation was measured across many contrasts, and develop an active learning exercise for undergraduate students. The experiment was coded using an open-source python package and psychophysical data were collected from two observers. On each trial, a sinusoidally modulated luminance grating appeared above fixation, and the task of the observer was to adjust the contrast of a grating below fixation until the two appeared identical. Between trials in the adaptation condition, a high contrast grating was presented in the top location; no such grating appeared between trials in the control condition. Contrast matches showed a clear reduction during the adaptation condition, thus demonstrating perceptual fading and a successful replication of Blakemore et al. (1971). We then simplified the approach and modified the code to create a single, seamless experience for use in the classroom. With instructions and theoretical background provided in a one-page handout, students can perform the experiment on themselves and view their results in an automatically generated figure. This exercise, a primary example of active learning, will help students gain a first-hand understanding of the perceptual effects of adaptation.
Minimax prediction of sequences with periodically stationary increments
Authors: Kozak P.S. , Luz M.M. , Moklyachuk M.P.
Published: September 2021

The problem of optimal estimation of linear functionals constructed from unobserved values of a stochastic sequence with periodically stationary increments based on its observations at points $ k<0$ is considered. For sequences with known spectral densities, we obtain formulas for calculating values of the mean square errors and the spectral characteristics of the optimal estimates of the functionals. Formulas that determine the least favourable spectral densities and minimax (robust) spectral characteristics of the optimal linear estimates of functionals are derived in the case where spectral densities of the sequence are not exactly known while some sets of admissible spectral densities are given.
Gradient almost Ricci solitons on multiply warped product manifolds
Authors: Günsen S. , Onat L.
Published: September 2021

In this paper, we investigate multiply warped product manifold \[M =B\times_{b_1} F_1\times_{b_2} F_2\times_{b_3} \ldots \times_{b_m} F_m\] as a gradient almost Ricci soliton. Taking $b_i=b$ for $1\leq i \leq m$ lets us to deduce that potential field depends on $B$. With this idea we also get a rigidity result and show that base is a generalized quasi-Einstein manifold if $\nabla b$ is conformal.
Prevalencia de lesiones y fitness en universitarios
Authors: Muñoz Carlos G. , Reina Santiago F. , Cifuentes Santiago V.
Published: September 2021

El agrado de las personas por realizar actividad física a través de las prácticas deportivas relacionadas con las modalidades del fitness y la presencia de lesiones en sus participantes han tenido un gran aumento en las últimas décadas. Por tanto, este artículo de investigación buscó evidenciar la prevalencia de lesiones en los estudiantes de la Universidad Santo Tomás (USTA) de Bogotá, Colombia. Esta investigación presenta un diseño no experimental de carácter transversal. Para el análisis se utilizó el instrumento CLUP-F con el que se  identificaron la modalidad de fitness que practican, el tiempo de práctica, la cantidad de veces que se lesionan y la región corporal afectada. Los datos estadísticos fueron analizados utilizando hojas de cálculo en Excel (versión 2016). Los resultados indicaron que todas las modalidades presentan un índice lesivo mayor o igual al 50 % de sus participantes, así como una predominancia de las lesiones sobre la articulación del hombro. A su vez, los practicantes de halterofilia y calistenia presentan el mayor porcentaje de participantes lesionados.
La posmodernidad en los fundamentos del sistema educativo costarricense
Authors: Solís Vargas Yors Guillermo
Published: September 2021

El siguiente ensayo tiene como propósito principal argumentar a favor de que el paradigma de la  complejidad, nuevo fundamento de la actual Política Educativa de Costa Rica, es posmodernista. Para este propósito, se utilizó una metodología de revisión de textos, entre los cuales, están documentos filosóficos, políticos, educativos y artículos académicos. Al final, después de exponer una serie de reflexiones críticas, se cerró el texto con una breve conclusión, visualizada desde la posmodernidad y el pensamiento complejo, que invita a reflexionar sobre la educación de dicho país.
Elementos teórico-metodológicos que sustentan el papel de investigación en la Maestría Profesional en Planificación de la Universidad Nacional
Authors: Láscarez Smith Daniel , Ortega Ortega Angel Abelino , Morales Abarca Luis Fernando
Published: September 2021

Una de las principales preocupaciones que expresan los estudiantes que cursan alguno de los dos énfasis de la Maestría Profesional de Planificación (MPP)1 está relacionada, por un lado, con las características administrativas y formativas que tienen las maestrías profesionales y las maestrías académicas; por otro lado, os alcances y las formas que adquiere la investigación científica en el ámbito profesional de la planificación. Esto ha derivado en que, en los últimos años, las personas estudiantes de la maestría experimenten dificultades para plantear, de forma clara y exitosa, las propuestas de trabajos finales de graduación (TFG). Este artículo es el resultado de un proceso de investigación, realizado con las personas estudiantes, con las personas expertas curriculistas y con el cuerpo docente de la Maestría Profesional en Planificación, sobre la relevancia de la investigación científica en contextos profesionales de la Planificación. Mediante una metodología cualitativa, se obtuvieron importantes hallazgos acerca de las dificultades epistemológicas y técnicas que emergen al proponer una investigación en ámbitos técnicos y profesionales. Trabajar sobre estos hallazgos permite mejorar la orientación científica y pedagógica de los nuevos estudiantes en relación con la comprensión del objeto de estudio de la planificación en el ámbito profesional y cómo la investigación aplicada juega un papel fundamental para el análisis del contexto sociopolítico, económico e institucional.
¿Cómo conforma el profesorado universitario su alta resiliencia? Un estudio de casos
Authors: Sierra-Molina Teresa De Jesús , Sevilla-Santo Dora Esperanza
Published: September 2021

Introducción. La resiliencia es entendida desde una perspectiva triádica, como la creación de nuevas estrategias a partir de la necesidad de resistir en una interacción de características personales, con un ambiente familiar estable, así como con un contexto que apoye. Objetivo. conocer cómo el profesorado universitario conforma su alta resiliencia, para que tanto este como las IES puedan disminuir factores de riesgo, promover mecanismos que permitan altos niveles de resiliencia y una mayor permanencia en la labor docente. Metodología. Enfoque cualitativo de alcance descriptivo, con ocho profesores y profesoras de ingeniería y psicología de IES públicas y privadas del sureste mexicano, que formaron parte de un trabajo doctoral con enfoque mixto Resultados. Se identifica la importancia de aspectos profesionales y de la labor docente en la conformación de la alta resiliencia, ya que actúan como factores protectores y de riesgo, tanto internos como externos, que permiten mantener la alta resiliencia. Le siguen, en importancia, aspectos personales que funcionan como protectores y de riesgo, como el compaginar la docencia con la maternidad de hijas e hijos pequeños. En tercer lugar, se identifican aspectos institucionales percibidos casi en igual medida como protectores y de riesgo. Por último, los aspectos sociales son más percibidos por el personal docente de ingeniería y por el de tiempo completo. Conclusiones. Se corrobora la dinámica y bidireccionalidad de estos aspectos en la conformación de alta resiliencia que, según las experiencias del personal docente, son percibidos como factores protectores que mitigan los muchos riesgos en forma de retos que la docencia actual les presenta.
Situación de la investigación educativo-musical en México. Retos, reflexiones y propuestas
Authors: Capistrán-Gracia Raúl Wenceslao
Published: September 2021

Introducción. El mundo actual demanda de las instituciones de educación superior, personas investigadoras que generen conocimientos nuevos, promuevan su difusión y fomenten la vinculación, a fin de impulsar cambios y resolver problemáticas sociales. Objetivo. El objetivo de esta revisión bibliográfica consistió en determinar la situación actual de la investigación educativo-musical en México. Para lograrlo, se llevó a cabo una búsqueda documental sistemática, se localizaron fuentes primarias que proporcionaran información sobre el objeto de estudio en diversas bases de datos, repositorios de tesis y disertaciones, páginas web y textos. Metodología. La metodología utilizada fue el análisis de contenido, asistido por el programa ATLAS TI 8.0, por medio del cual se clasificó, estructuró y analizó la información reunida, se creó un esquema general y, a partir de él, se generaron las conclusiones. Resultados. Los resultados indican que ha habido algunos avances importantes, sin embargo, el número de personas investigadoras en educación musical es muy reducido, gran cantidad no está plenamente habilitado, no existen revistas nacionales especializadas en ese ámbito investigativo, la bibliografía del país es limitada y las reuniones académicas son escasas. Finalmente, el Padrón 2019 del Sistema Nacional de Investigadores indica que solo tres académicos tienen esa distinción. Conclusión. Existe un rezago importante, a pesar del impacto que la educación musical puede ejercer en el individuo. Se recomienda que las instituciones de educación superior implementen programas de formación de personal investigador para habilitarlo plenamente, y promueva sistemas de vinculación, para que los conocimientos generados tengan un uso inmediato en la sociedad.
Praxis pedagógica desde la inclusividad: Una mirada a la docencia universitaria de la Universidad Nacional de Costa Rica
Authors: Valdivia Durán Stephanie
Published: September 2021

Today, inclusive educational practices are currently a challenge in Costa Rica; specifically, in the area of education, there are many aspects that need to be improved. This situation is not unrelated to higher education, so in this paper is intended to approach how educational practices are lived in the actual practice of university teaching at Universidad Nacional, Costa Rica. This will be done with the aim of knowing what progress has been made and what challenges still need to be addressed immediately. As a result, the reality of the population with disabilities is contextualized; a conceptual and historical clarification about inclusion is made; and the legislation protecting this population, the scope, and challenges in terms of inclusion faced by faculty at Universidad Nacional are described along with a series of proposals that the university could consider to face the challenges encountered.
Portafolios de evidencias para un aprendizaje contextualizado y una evaluación formativa en Ingeniería en Computación: Experiencia en el curso de Análisis de Algoritmos
Authors: Munguía Molina Diego
Published: September 2021

The course Analysis of Algorithms from the major in Computer Science at TEC is fundamental part of the academic preparation of professionals in the areas of software engineering or computer science. I also has a strong mathematical component that differentiates it from other courses that are more focused on programming. Based on these characteristics, three questions to improve the course were formulated: How can meaningful, permanent learning of contents be fostered?, How can these instances of learning be placed in a context that allows applying them for society’s improvement and well-being?, and How can a more fair and more formative assessment process be attained? Thus, a methodology of pedagogical mediation focused on portfolios is proposed. The effects of applying this methodology in the course during two semesters was analyzed qualitatively from observations and students’ reflexions. The findings point to an improvement in students’ grades and deepening in the contents studied thanks to the opportunity and motivation to inquire, learn by doing, and reflect on one’s own learning.
Modelo pedagógico helicoidal para la enseñanza y el aprendizaje de la química en entornos universitarios
Authors: Rojas Ulate Marcos
Published: September 2021

Scientific university pedagogy has several shortcomings related to the educational system that affect students’ professional growth. Due to this situation, a new pedagogical model is required to solve these problems and limitations. Helical pedagogy establishes the necessity to set up an emotional, retroactive, interconnected, and gradient education to help students apply knowledge during every single moment of their labor or academic life. Through the stimulation of some mental processes related to human beings during their entire life (childhood or adulthood), knowledge can be created faster and in an easier way. Still, also a solid platform is required which contributes to the helical learning, for instance, individual projects, dynamic classes with two or more professors, and, of course, the avoidance of lectures and traditional evaluation methods. These changes do not mean that the quality of the educational system should be lower. The only objective of this new pedagogical method is to improve the way that chemistry is being learned by the students and also to make them more confident about their potential. This will happen if they change their perspective and vision about their studies and professional careers. This helical model seeks to transform the way to understand chemical pedagogy by using theoretical and praxeological proposals applicable in any context around the world.
Borges y los libros
Authors: Durán Luzio Juan
Published: September 2021

Se explora la relación entre Borges y los libros.
Presencia satánica en el Río Danubio: anagramas en "Lejana" de Julio Cortazar
Authors: Arrieta Vargas Vilma
Published: September 2021

Se analiza el uso de los anagramas r como estrategia narrativa en un cuento de Cortáza.
El diálogo intertextual en Mayapán
Authors: Araya S. Seidy
Published: September 2021

Se analiza la novela Mayapán de la escritora hondureña Argentina Díaz Lozano.
Students' First Approach to Reading Comprehension: Pre-Reading Strategies
Authors: Chacón Arce Xinia
Published: September 2021

Se aborda el asunto de la comprensión de lectura en la clase de lengua y se presentan estrategias de prelectura.
Sociocrítica y fenómenos de transtextualidad
Authors: Carcaud-Macaire Monique
Published: September 2021

Se aborda un caso de variación transexual en textos escritos y audiovisuales.
Indigenismo y marginación de los negros en Amércia Latina
Authors: Lavou Zoungho Victorien
Published: September 2021

Se intenta demostrar la contribución (indirecta) del indigenismo a la exclusión de los negros en América Latina.
Lectura y consagración en El hondero entusiasta de Pablo Neruda
Authors: Gamboa Goldemberg Jaime
Published: September 2021

Se aborda el estudio de los conceptos de lectura y lector, junto con la obra El hondero entusiasta, de Pablo Neruda.
La ironía del chiste
Authors: Pérez Yglesias María
Published: September 2021

Se aborda el estudio del chiste como socio-texto.
The English Reading Comprehension Class: In-Reading and Post-Reading Strategies
Authors: Chacón Xinia
Published: September 2021

Se proponen un conjunto de estrategias de lectura y poslectura.
La nueva morfología y sintaxis
Authors: Murillo José Manuel
Published: September 2021

Se presentan el Programa minimalista y la Morfología de base lexo-morfémica, ambas teorías propias del campo de la lingüística.
La ciudad marroquí en Los nombres del aire de Alberto Ruy Sánchez y Aguafuertes españolas de Roberto Arlt
Authors: Limami Abdellatif
Published: September 2021

Se explora el tema de la presencia árabe en la literatura latinoamericana.
La literatura histórica en Costa Rica hoy: contribución al debate teórico
Authors: Chacón Albino
Published: September 2021

[Literatura costarricense contemporánea]
La traducción: interacción de semiosferas
Authors: Gaínza Gastón
Published: September 2021

[Traducción y lingüística del texto]
Naujienos
Authors: Psichologija
Published: September 2021

...
Innovative technology of obtaining organic marble beef
Authors:   State Institution “The Institute of Grain Crops NAAS”, 14 V. Vernadsky str., Dnipro, 49009, Ukraine, Kozyr V. S.
Published: September 2021

The aim was to develop an innovative technology for obtaining high-quality organic marble beef. In the experimental farm “Polyvanivka” of the Institute of Grain Crops NAAS the cultivation of bulls of the gray Ukrainian breed up to 30 months of age has been organized using fodder which is traditional for steppe zone of Ukraine. The work has been performed according to the research program of the National Academy of Agrarian Sciences of Ukraine no. 37 “System of work in populations and conservation of biological diversity of genetic resources of farm animals” (“Preservation of breed gene pool”). The expediency of organic production of high-quality marble beef obtained in the steppe zone of Ukraine from gray Ukrainian cattle has been proven. This breed has such economically useful features as the duration of production use, longevity, high growth energy (stable average daily gain over 1 kg), and the conversion of diet into products (feed consumption is 70–80 MJ per 1 kg of growth) correlating with the age of the animal, slaughter rates (>60%, meat content is >4 kg per 1 kg of bones, hard skin is >30 kg which belongs to the category of bull production). We have found that it is necessary to determine the cattle fatness not by subcutaneous fat which has no dietary value, but by the beef marbling as a sign of its quality which takes into account the presence of intramuscular and intermuscular fat including unsaturated fatty acids, vitamins A and D, as well as the amount of protein and moisture and taste and culinary features of the carcass flesh, such as tenderness, juiciness and aroma. This meets the requirements of the consumer. The proposals based on the results of research on technological changes in animal husbandry promote the development of meat cattle breeding and are of great economic importance for strengthening the health of the population and food safety in Ukraine.
Prooxidant-antioxidant homeostasis and reproductive capacity of boars under the influence of copper citrate
Authors:   Poltava State Agrarian Academy, 1/3 Skovorody str., Poltava, 36003, Ukraine, Siabro A. S.
Published: September 2021

Peroxide oxidation processes play a leading role in ensuring the motility, survival and fertilizing ability of sperm. A special role is given to limiting antioxidants (vitamins, amino acids, microelements). Therefore, the development of standardized feeding programs to provide antioxidant nutrition is one of the effective methods of reproductive biotechnology. The aim of the study was to determine the effect of copper citrate on the quality of sperm production and the formation of prooxidant-antioxidant homeostasis in sperm of boars. The experiment used adult boars of a large white breed, analogs in age, live weight and quality of sperm products. Experimental groups were fed copper citrate above the norm by 10% and 20%. It has been determined that feeding combined feed to boars with the addition of this compound in an amount of 10% above norm probably increases the weight of ejaculate by 12.5% (P<0.05), the sperm motility and survival by 6.5% (P<0.01) and 13.5% (P<0.001), respectively. Such changes in sperm occur against the background of an increase in SOD activity by 80.6% (P<0.05), a decrease in catalase by 43.5% (P<0.05), a slowing down of peroxidation processes — a decrease in diene conjugates and TBA-active compounds. The additional introduction to the diet of copper citrate by 20% more than normal increases the concentration of spermatozoa by 13.2% (P<0.01), the number of live spermatozoa by 20.7% (P<0,01), with a simultaneous decrease in their survival, due to the acceleration of peroxidation processes — an increase in the content of diene conjugates, TBA-active compounds and DAA and a decrease in reduced glutathione. It has been found out that the fertilizing ability of sperm significantly depended on the amount of fed microelement. Sows inseminated with sperm of boars receiving copper supplement in the diet by 10%, had higher fertility rates by 7.1%, multifertility by 3.6%, and a litter weight at weaning by 8.8%. The additional administration of copper citrate reduced the fertility of sperm by 20%, as the fertility rate of sows of III group was the lowest and was 7.7% and 14.3% lower compared to I and II groups. A similar trend occurred in terms of high fertility, a litter weight at birth and weaning. Therefore, the additional feeding of a small amount of copper has a positive effect on the functional activity of sperm and the processes of normal fertilization, growth and development of embryos and newborn piglets by optimizing the formation of prooxidant-antioxidant homeostasis.
Endogenic retroviruses of PERV A/C in genome of Ukrainian pigs and their correlation with the level of fat in carcasses
Authors:   Andrei Krupynskyi Lviv Medical Academy, 70 Petro Doroshenko str., Lviv, 79000, Ukraine, Ryk T. M.
Published: September 2021

The article presents the analysis of the PERV retrovirus subtypes A and C frequency in populations of Ukrainian and foreign breed pigs. Different frequencies of the PERV A/C genome presence in animals of the studied breeds were established. The largest relative number was observed in the group of wild pigs (86%), the smallest was in the groups of Poltava meat and Piétrain breeds. Animals free of both virus subtypes were found in all study groups. The article considers the hypothesis of an increase in the frequency of PERV retrovirus in the pigs’ genome during domestication. Its integration caused a gene mutation responsible for fat deposition which led to increased fat amount in carcasses and could be picked up by selection in the process of creating breeds. However, there is no obvious link between the spread of the virus in modern breeds in different areas of productivity. Also, there is no association between carcass fat amount and the presence of PERV in the genome. It is established that the information on the PERV A/C distribution in pig breeds hold in Ukraine is useful in terms of the possibility of using each of them for xenotransplantation. Also, this information can be used to justify the selection of founding breeds in order to create lines of pigs free from the endogenous retrovirus genome.
Effect of hop cones and vitamin E on ketogenesis and antioxidant status in transition dairy cows
Authors:   Institute of Animal Biology NAAS, 38 V. Stus str., Lviv, 79034, Ukraine, Sachko S. R. , Vudmaska I. V. ,   Institute of Animal Biology NAAS, 38 V. Stus str., Lviv, 79034, Ukraine, Nevostruyeva I. V. ,   Institute of Animal Biology NAAS, 38 V. Stus str., Lviv, 79034, Ukraine, Sachko R. G. ,   Institute of Animal Biology NAAS, 38 V. Stus str., Lviv, 79034, Ukraine, Petruk A. P. ,   Stepan Gzhytskyi National University of Veterinary Medicine and Biotechnologies Lviv, 50 Pekarska str., Lviv, 79010, Ukraine
Published: September 2021

The purpose of the work was the correction rumen fermentation in the transition cows to prevent metabolic disorders. For the experiment, two groups of Ukrainian dairy black-and-white breed cows were formed, 10 animals per group. The experiment lasted 3 weeks prepartum and 3 weeks postpartum. Animals received a balanced diet, which consisted of haylage, silage, barley, wheat, corn, soybean meal, salt, mineral and vitamin premix. The first group was the control. To the diet of second group 300 mg of α-tocopherol acetate (0.6 g of Rovimix E-50) and 1 g/kg of dry hop cones per kg of dry matter was added. Before calving, the tested feed additive reduced the concentration of peroxide oxidation products in the cows blood (P<0.05) without affecting other parameters. Changes that are more significant detected after calving. A decrease in the concentration of lipid hydroperoxides (P<0.05), TBARS (P<0.05), and beta-hydroxybutyrate (P<0.05) were observed in the blood of the cows of the experimental group. Therefore, the addition into diet of transition cows of α-tocopherol and hop cones inhibits the lipid peroxidation and reduces the ketones formation. So, this feed supplement can be used to prevent ketosis and steatosis in cows.
Development of technology and doses of native and immobilized invertase in beekeeping
Authors:   Bila Tserkva National Agrarian University, 8/1 Soborna sq., Bila Tserkva, Kyiv region, 09117, Ukraine, Bezpalyi I. F. , Postoienko V. O. ,   HSC “Institute of Beekeeping named after P. I. Prokopovich”, 19 Zabolotnoho str., Kyiv, 03680, Ukraine, Merzlov S. V. ,   Bila Tserkva National Agrarian University, 8/1 Soborna sq., Bila Tserkva, Kyiv region, 09117, Ukraine, Korol-Bezpala L. P. ,   Bila Tserkva National Agrarian University, 8/1 Soborna sq., Bila Tserkva, Kyiv region, 09117, Ukraine
Published: September 2021

The increased sucrose content of acacia honey is associated with the influence of two factors that restrain the intensity of the disaccharide breakdown process. On the one hand, this is an insufficient invertase activity of the pharyngeal glands in worker bees, and on the other hand, nectar consists mainly of sucrose. According to National Standard of Ukraine 4497:2005, natural honey from white acacia should contain no more than 10% sucrose, but very often beekeepers violate the technology of honey collection and an insufficiently mature product is pumped out. Such honey is not allowed for sale. To avoid such consequences, the use of the enzyme preparation invertase at the stage of the nectar maturation process will contribute, it will make it possible to obtain a product with a lower mass fraction of sucrose. This invertase preparation is used as a food additive in the confectionery industry as a technological tool for the production of invert syrup from sucrose solutions. However, the available information in printed sources on the use of artificial invertase and its effect on the breakdown of disaccharide in beekeeping has not been sufficiently studied. The article investigates the methods of introducing an enzyme preparation into the body of bees for processing nectar. The doses of native and immobilized invertase in beekeeping have been determined. It has been experimentally established that the best way to introduce invertase is to add the enzyme directly to the cells of the combs before placing them in the nests for filling with nectar. Application of 0.2% milk whey powder in syrup stabilizes and prolongs the effect of the enzyme in the honeycomb. The optimal dose of enzyme introduction into the honeycomb is 2–3 mg per 50 mg of syrup with 0.2% milk whey powder.
O jovem Catopê e seus processos educativos no terno de Nossa Senhora do Rosário, em Montes Claros
Authors: Brandão Viviane Bernadeth Gandra , Alves Vânia de Fátima Noronha
Published: September 2021

Este estudo consiste em analisar a dinâmica do jovem, observando os seus processos educativos e constituição no segundo terno dos Catopês de Nossa Senhora em Montes Claros –MG. Os catopês, em sua maioria são homens negros adultos, jovens e crianças, os quais formam um grupo denominado de terno que fazem parte do congado norte mineiro. Ele se destaca por ser o que possui o maior número de jovens que expressam em suas ações uma mistura de ritos africanos e católicos. Este trabalho fundamenta-se na relação entre educação e cultura, partindo do pressuposto de que as construções dos processos educativos dos jovens catopês contribuem para a continuidade da formação subjetiva dos mesmos. Trata-se de uma pesquisa qualitativa de caráter exploratória com abordagem etnográfica, por meio da observação participante e entrevistas, conduzidas por um grupo focal. Os resultados contribuem, para uma reflexão sobre o sentido atual de uma tradição duradoura que perpassa a dinâmica da cultura e da educação.
Saberes da docência universitária
Authors: Júnior Antônio Germano Magalhães , Neta Maria de Lourdes da Silva , Dos Santos Maria Terla Silva Carneiro
Published: September 2021

Esta escrita, resultado de investigações realizadas por um grupo de pesquisadores, objetivou compreender a constituição dos saberes que são mobilizados nas práticas de ensino de professores atuantes na área de “história e ensino” do Curso de Licenciatura em História, ofertado por uma instituição de ensino superior (IES) pública cearense. Para tanto, levou-se em consideração aspectos da trajetória de vida, que estão para além de sua experiência acadêmica e profissional. Em face de privilegiar a abordagem qualitativa, escolhemos o Estudo de Caso como opção de caminho metodológico e, recorremos à pesquisa bibliográfica e documental, e, entrevistas semiestruturadas. Os resultados, analisados a partir da Análise de Conteúdo Temática, revelaram que os saberes mobilizados nas práticas de ensino dos professores investigados contemplam saberes da formação, da experiência, da ação pedagógica e sua constituição corrobora o caráter personalizado desses saberes que as pesquisas da área vêm mostrando.
Researches about Higher Education in Brazil
Authors: Jacinto Asaph Armando
Published: September 2021

The field of Higher Education is advancing worldwide. This work aimed to apply a bibliometric approach on scientific publications about education in the sector of Higher Education, especially concerning the Brazilian ones. For this purpose, the database of Web of Science was used. The analyzed indicators included the Brazilian position worldwide concerning the number of papers and of citations, languages of publications and international collaborations. They were compared with other countries in MERCOSUR and in Latin America. In addition, the main institutions and funding agencies in Brazil were verified. The results showed that Brazil is the most prolific country in the Latin America, and it is among the most important in the world too. Most of the Brazilian articles were in Portuguese. Most of the Brazilian researchers were from public universities (e.g., USP, UFSC and Unesp) and supported by public agencies (as CNPq, CAPES and FAPESP). While most of the international collaborations happened with Portugal, Spain and USA. Besides that, suggestions of future studies in this area were indicated.
The complex social and legal context of the use of live birds in Mexico
Authors: Roldán-Clarà Blanca , Leyva Claudia , Espejel Ileana , López-Medellín Xavier
Published: September 2021

The use of song and ornamental birds (SOB) as pets is a traditional and commercial activity in Mexico. This paper is part of a larger research which aim was to analyze the commercial use of birds. The objective is to depict the complexity of the stake-holders system involved in the activity of live birds selling in Mexico. We display in diagrams the main stakeholders involved in the activity, highlighting stakeholders acting in several or three spatial scales (micro- or regional, meso- or national, and macroor global) and the extent of their influence in management. Depicting the complexity in the use of SOB is essential to better understand the decision-making process and improve it in the future.
Bacterial resistance to antiseptics and disinfectants – minireview
Authors: Zhelev G.
Published: September 2021

The appearance of bacterial resistance to disinfectants and antiseptics is an issue of substantial health concern, resulting in low efficiency of epidemic control activities and emergence of microorganisms with cross-resistance to antibiotics and biocides. A synopsis of the main mechanisms of development of resistance to biocides is presented. The emphasis is placed to health risks and impact on medical practice. The main methods for detection of resistance, and prevention measures of key importance for its control are outlined.
Post-Cricis Management in the Hungarian Automobile Dealership Sector
Authors: Illés Csaba Bálint , Turzai-Horányi Beatrix , Dunay Anna
Published: September 2021

Although it is one of the world’s most successful industries, the automotive industry was one of the biggest losers of the economic crisis of 2008. The crisis caused negative effects throughout the automobile supply chain, but research about this period has been focused on car dealerships. The objective of this paper is to provide insight gained from comprehensive research conducted in the Hungarian car trade market through in-depth interviews with car dealership owners and a wide questionnaire survey with the managers of car dealerships. The paper focuses on crisis management measures of the post-crisis period. Statistical methods were applied in the analysis of the questionnaire, such as cross-tabulation analysis, chi-squared tests, cluster analysis, variance analysis, and Tukey-type HSD. The study explores the factors and tools for surviving the crisis. Research results confirm that focusing on sales, customer service, and quality are the key factors for keeping and increasing competitiveness and market position
Assessment of the Network Interaction Synergistic Effect According to the Organization Life Cycle
Authors: Alona Hrebennikova  , Artemchuk Liudmyla , Nahornyi Vitalii , Daliak Nadiia , Ruban Olha
Published: September 2021

The article's purpose was to econometric substantiate the peculiarities of achieving a synergistic effect and sources of economies of scale for participants in entrepreneurial networks, for example, industrial enterprises in Ukraine. The regression analysis method has been used to identify sources of economies of scale of production, which change affects the efficiency of enterprises. With the elasticity coefficient, the features of the manifestation of the effect of economies of scale for 106 network and non-network enterprises were determined, taking into account the organizational life cycle of the development. It was revealed that, despite the ephemeral nature of the economies of scale, network enterprises are characterized by longer nature as a component of the synergistic effect of production activities and a decrease in costs, regardless of the development cycle of the organization. The results obtained can be useful as a basis for strategic planning in business integration.
Features of the Influence of Human Capital on Economic Development: The Case of Ukraine
Authors: Zolkover Andrii , Kaplina Аnastasiіa , Loboda Olena , Kyrychenko Natalia , Chopko Nataliia
Published: September 2021

The purpose of this article is to substantiate the nature of the relationship between the development of human capital (HC) and the development of the economy of Ukraine. Using the Granger test and cognitive modeling, the features of the development of HC in modern conditions and its influence on the country's economic development have been determined, and the dominant factors influencing the development and quality of HC have been empirically substantiated. The ambiguous nature of the influence of HC on the country's economy due to the inefficiency of spending in the field of education and health care has been established using the impulse modeling method. The positive impact of the development of HC on the development of the economy is leveled with the growth of investment in education and health care, which is due to the low efficiency of expenditures and the insufficient level of competence of state bodies.
European Union–Ukraine Association Agreement: Challenges and Prospects for Cooperation
Authors: Durman Olena , Durman Mykola , Mazievich Tatyana , Zhiliaieva Oksana , Arkhypenko Svitlana
Published: September 2021

The purpose was to substantiate the features and determine an effective strategy for Ukraine's Eurointegration. Used a theoretical analysis of reports on the fulfillment of the terms of the European Union (EU)–Ukraine Association Agreement (AA), we identified the problems and destructive factors of the European integration for Ukraine.  The graph theory helped to prioritize these problems in the context of implementing the AA's tasks. Constructed neural models and elasticity coefficients provided a quantitative assessment of the adequate performance of strategic functions within the framework of the AA for Ukraine has been carried out. Priority of conduction tasks argued the importance of implementing a strategy of moderate adaptation for Ukraine to increase the positive effect of cooperation with the EU and sustainable development of the country
Why gender is relevant to materials science and engineering
Authors: Pollitzer Elizabeth
Published: September 2021

For historical reasons science today has substantially more evidence for males and men than for females and women, which means that quality of research and innovation outcomes may often be worse for women than for men. I explore how the gender dimension—a term used to mean effects of biological (sex) and/or socio-cultural (gender) characteristics—fits into new materials research and engineering and especially in nano-materials applications. Horizon Europe expects that grant proposals should include explanation if gender dimension is relevant to the project’s objectives. This paper shows that often the answer should be yes it is.
Expression of tissue inhibitors of metalloproteinases type 1 and type 2 in the leaflets of explanted bioprosthetic heart valves: a new pathogenetic parallel between structural valve degeneration and calcific aortic stenosis
Authors: Kostyunin A. E. , Glushkova T. V. , Bogdanov L. A. , Ovcharenko E. A.
Published: September 2021

Objective: to study cellular and lipid infiltration, as well as the expression of tissue inhibitors of metalloproteinases (TIMP) types 1 and 2 in biological prosthetic heart valves (BPHVs) explanted due to dysfunction.

Material and Methods. We examined 17 leaflets from 6 BPHVs, dissected from the aortic and mitral positions during valve replacement. For microscopic analysis, fragments of the BPHV leaflets were frozen and serial sections were made using a cryotome. In order to study cellular infiltration and the degree of degenerative changes in the prosthetic biomaterial, the sections were stained with Gill’s hematoxylin and eosin; Oil Red O stain was used to assess lipid deposition. Immunohistochemistry was used for cell typing and detection of TIMP-1/-2. The stained samples were analyzed by light microscopy.

Results. Cellular and lipid infiltration of xenogeneic tissues was detected in all BPHV flaps studied. Recipient cells coexpressed pan-leukocyte and macrophage markers PTPRC/CD45 and CD68. Positive staining for TIMP-1/-2 co-localized with cell clusters but was absent in acellular sections.

Conclusion. Cells infiltrating xenogeneic BPHV tissues express TIMP-1/-2. This suggests that BPHV immune rejection pathophysiology is partially similar to that of calcific aortic stenosis.
Tolerance and minimization of immunosuppressive therapy after liver transplantation
Authors: Gerasimova O. A. , Borovik V. V. , Marchenko N. V. , Tileubergenov I. I.
Published: September 2021

In this review of current publications, we look at the molecular mechanisms of tolerance of the liver and its allografts in terms of minimization and possibilities of withdrawing immunosuppressive therapy, mainly in the long-term period after liver transplantation. Information about clinical trials with regulatory T cells (Tregs) for the purpose of tolerance induction is presented. Data from a new consensus study on individualization of immunosuppressive therapy regimens are presented. Options for possible withdrawal of immunosuppression both in the early and in the long term after liver transplantation (LT) are considered. We suggest a way to study the lymphoproliferative potential of a liver transplant recipient to be investigated, since not only rejection determines life expectancy, but also the degree of immunosuppression effect on bone marrow depending on patient age.
Laparoscopic ureteral reconstruction in a kidney transplant: successful clinical cases
Authors: Saydulaev D. A. , Sadovnikov S. V. , Biktimirov R. G. , Gadzhieva P. M. , Miloserdov I. A.
Published: September 2021

Treatment of ureteral strictures in the long-term post-transplant period is a complex surgical procedure. We present successful clinical cases of developed laparoscopic ureteral stricture reconstruction methods at three levels (in the pelvis, along the ureter, in the anastomosis area). These methods have shown their clinical efficacy: they are less traumatic, there are no adverse events in the early and long-term postoperative periods, and there is accelerated rehabilitation of recipients after surgery.