bluuebunny/crossref_metadata_2025 huggingface dataset:
A model for teaching ICT in primary and special education
Authors: Dagienė Valentina , Jasutienė Eglė , Jevsikova Tatjana , Zajančkauskienė Lina , Žilinskienė Inga
Published: December 2021

Lithuanian educational strategic provision states that the present poses completely new social, pedagogic and subject requirements for teachers; they must have good information and communication skills. Therefore, we should help teachers, provide relevant materials for education, and allow them to learn the newest things, use innovative methods. One of the ways to achieve that is to provide distant learning for teachers. The paper deals with problems of development of distant course for primary and special needs education teachers. Distant course model (goals, content, and implementation criteria) is presented. Methods of comparative analysis and synthesis of present scientific works are applied.
On estimations of the Taylor coefficients of functions from the class Kn(E)
Authors: Kirjackis Eduardas
Published: December 2021

In the article the estimations of the Taylor coefficients of functions from class Kn(E), formed by holomorphicin unit circle E = {|z| <1} functions F(z), F(0) = F(1)(0)= . . .= F(n−1)(0)= 0, F(n)(0) =n!,which have nonvanishing n-th are given.
The Impact of Currency Misalignment on Trade Balance of Emerging Market Economies
Authors: Mamun Abdullahil , Akça Emrah Eray , Bal Harun
Published: December 2021

This study is an attempt to examine the impact of currency misalignment on the trade balance of emerging market economies from 1980 through 2016. It firstly measures the equilibrium RER and corresponding misalignment series of 21 EMEs separately adopting a single equation approach and then includes them in the trade regression together with undervaluation and overvaluation to estimate the dynamic relationship between the trade balance and real exchange rate misalignment employing the system generalized method of moment estimation approach. The study suggests that, being a composite series of undervaluation and overvaluation, higher real exchange rate misalignment helps recover trade imbalances. It also identifies that undervaluation improves trade balance, while overvaluation cuts it down. The study identifies that the misalignment series of RER for most of the EMEs are substantially dominated by overvaluation episodes, and hence the opposing impact of undervaluation and currency misalignment on the trade balance of EMEs is not surprising. From the policy perspective, competitiveness achieved through currency movements helps emerging market economies not only to improve trade balance but also to withstand vulnerability that arises from huge external borrowings creating a strong external payment position.
Bank Liquidity Hoarding Strategies in Uncertain Times: New Evidence from an Emerging Market with Bank-level Data
Authors: Dang Van Dan , Nguyen Hoang Chung
Published: December 2021

The paper explores the impact of uncertainty on bank liquidity hoarding, particularly providing new insights on the nature of the impact by bank-level heterogeneity. We consider the cross-sectional dispersion of shocks to key bank variables to estimate uncertainty in the banking sector and include all banking items to construct a comprehensive measure of bank liquidity hoarding. Using a sample of Vietnamese banks during 2007–2019, we document that banks tend to increase total liquidity hoarding in response to higher uncertainty; this pattern is still valid for on- and off-balance sheet liquidity hoarding. Further analysis with bank-level heterogeneity indicates that the impact of banking uncertainty on liquidity hoarding is significantly stronger for weaker banks, i. e., banks that are smaller, more poorly capitalized, and riskier. In testing the “search for yield” hypothesis to explain the linkage between uncertainty and bank liquidity hoarding, we do not find it to be the case. Our findings remain extremely robust after multiple robustness tests.
Commercial exploitation of Kуiv reservoir as a fishery water body (a review)
Authors:   State Environmental Inspectorate of Ukraine, Kуiv, Lytvynenko V. , Khrystenko D. ,   Institute of Fisheries of the National Academy of Agrarian Sciences, Kyiv, Kotovska G. ,   Institute of Fisheries of the National Academy of Agrarian Sciences, Kyiv, Kolesnik N. ,   Institute of Fisheries of the National Academy of Agrarian Sciences, Kyiv, Simon M. ,   Institute of Fisheries of the National Academy of Agrarian Sciences, Kyiv
Published: December 2021

Purpose. To analyze an array of special scientific literature and summarize the obtained information on the commercial exploitation of the Kуiv reservoir as a fishery water body. To review main abiotic conditions of the reservoir, which exist and form the specificity of its commercial use by the fishery industry of Ukraine. To highlight the historical course of their impact on the fish fauna of the Kyiv Reservoir and general forecasts for its future transformations. Findings. An overview of scientific publications devoted to the specifics of commercial exploitation of the Kуiv reservoir as a fishery water body from the moment of its creation to the present day were presented. In particular, following was analyzed: hydrological regime, color and chemical composition of water, oxygen regime, accumulation of heavy metals, formation of bottom sediments and landscape. In addition, the radioecological situation in the reservoir was anazyed, both general and in three most significant areas for fisheries — in bottom sediments, macrophytes, and fish fauna. The literature data on the specificity of the above-mentioned abiotic factors in this reservoir, which form the hydro-ecological feature of this reservoir, were generalized. The main directions of their influence on the ichthyofauna of the Kуiv reservoir, which affect the possibility of its commercial exploitation, were described. The share of anthropogenic origin in the composition of the above-mentioned abiotic factors and the consequences of its impact were highlighted. The perspective ways of further development of the Kiev reservoir as a fishery water body of strategic importance for Ukraine were shown. Practical Value. The review may be useful for scientists, PhD students, students, government authorities, and private entrepreneurs involved in research process or exploatation of aquatic living resources in internal water bodies, primarily in the Kуiv reservoir. Keywords: Kуiv reservoir, fishery water body, hydrological regime, water chemical composition, water oxygen regime, heavy metals, bottom sediments, landscape formation, radioecological situation.
Complex Geochemical Characteristics of Soils and Plants in Natural Reserve Zones of Ukraine
Authors:   M.P. Semenenko Institute of Geochemistry, Mineralogy and Ore Formation of the NAS of Ukraine, Kryuchenko N.O. , Zhovinsky Ya. ,   M.P. Semenenko Institute of Geochemistry, Mineralogy and Ore Formation of the NAS of Ukraine, Paparyga P.S. ,   Carpathian Biosphere Reserve of the Ministry of Environmental Protection and Natural Resources of Ukraine, Zhuk O.A. ,   M.P. Semenenko Institute of Geochemistry, Mineralogy and Ore Formation of the NAS of Ukraine, Kukhar M.V. ,   M.P. Semenenko Institute of Geochemistry, Mineralogy and Ore Formation of the NAS of Ukraine, Dmitrenko K.E. ,   M.P. Semenenko Institute of Geochemistry, Mineralogy and Ore Formation of the NAS of Ukraine, Popenko T.A. ,   M.P. Semenenko Institute of Geochemistry, Mineralogy and Ore Formation of the NAS of Ukraine
Published: December 2021

The results of a comprehensive analysis of the microelement composition of soils — B, Co, Cu, Mn, Mo, Ni, Zn and plants — Ag, Co, Cu, Mn, Mo, Ni, Pb, Zn (oak (Quercus robur L.), pine (Pinus sylvestris L.) perennial grasses — Kupena (Polygonatum multiflorum (L.) All.), wheatgrass (Elymus repens (L.) Gould)) of natural reserve belonging to different physical and geographical zones — Polessky reserve (mixed forest zone), Roztochya reserve (broad-leaved forest zone), Kanevsky reserve (forest-steppe zone), the reserve «Askania Nova» (steppe zone), the Chernogorsk massif of the Carpathian Biosphere Reserve (KBR, Ukrainian Carpathians), which are proposed to be considered as background. It was found that in the soils of mixed and broad-leaved forests and the Chernogorsk massif KBR with an increase in the content of gross forms of Co, Cu, Ni, Zn, the content of their mobile forms increases, this dependence is inverse in the soils of the steppe zone, which is associated with a decrease in soil acidity and mobility microelements A positive correlation was revealed between the humus content in soils and Zn, Co (gross and mobile forms) and negative — B, Mo in the soils of all reserve zones. It was found that the greatest biogeochemical activity is characteristic of plants in the zone of deciduous forests — oak leaves (Quercus robur L.) and pine needles (Pinus sylvestris L.).
U-Pb Age, by Zircon, of the Pre-Klesiv Breed Association of the Osnytsky Block
Authors:   M.P. Semenenko Institute of Geochemistry, Mineralogy and Ore Formation of the NAS of Ukraine, Vysotsky O.B. , Stepanyuk L.M. ,   M.P. Semenenko Institute of Geochemistry, Mineralogy and Ore Formation of the NAS of Ukraine, Shumlyanskyy L.V. ,   M.P. Semenenko Institute of Geochemistry, Mineralogy and Ore Formation of the NAS of Ukraine
Published: December 2021

The Osnytsky block is an integral part of the Osnytsky-Mikashevytsky volcanic-plutonic belt, represented by early proterozoic igneous rocks of different compositions. This is a new type of igneous belts for the early precambrian – a paleotypical analogue of intracontinental volcanic-plutonic belts by the phanerozoic, which was formed in the conditions of mature continental crust in the initial stage of radical structural rearrangement of the cratonized gneiss base of the Eastern European platform. Volcanogenic formations have undergone regional metamorphism at a level not higher than the epidote-amphibolite facies, classified in the klesiv series, which combines effusives of basic, acidic and medium composition and occupies a higher stratigraphic position compared to the metamorphites of the teteriv series. Intrusive rocks (gabbro-diorite-granodiorite granite association) – to the osnitsky complex. Rocks of the osnitsky complex are widespread, they account for 80-85% of the area of the Osnitsky block. The pre-klesiv association, represented mainly by gneisses of the teteriv series and plagiogranitoids of the sheremetivsky complex, has a limited distribution. The LA-ICP-MS U-Pb method was applied to date zircon from plagiogranite and plagiomigmatite of the sheremetivsky complex, and from gneiss and amphibolite. The plagiogranite yielded an age of 2110 ± 8, and plagiomigmatite of 2165 ± 22 Ma. Hence, granitoids of the sheremetivsky complex in the Osnitsk block were formed between 2.16 and 2.11 Ga. The age of the metamorphism of gneisses was defined as 2198 ± 29 Ma, whereas zircon from amphibolite crystallized at 1981 ± 36 Ma. Correspondingly, gneiss can be attributed to the teteriv series, whereas amphibolite can belong to either osnitsky complex, or nartsyzivsky complex.
El impacto comparado de las políticas de transparencia en los procesos democráticos de Chile y Colombia en el primer cuarto del siglo XXI
Authors: Del Castillo-Rengifo Daniel , Carvajal-Cabal Mario
Published: December 2021

En este artículo se estudia la corrupción como un problema político cuyo análisis se debe realizar acorde a las categorías conceptuales de la ciencia política y de todas las áreas de las ciencias sociales. Los aportes de la ciencia política a la investigación sobre el fenómeno de la corrupción se establecen en la tipología que mejor se adapta a sus últimas evoluciones y permiten comprenderlo más allá de la tradicional distinción público/privado, hoy en día obsoleta. A través de un análisis comparativo realizado con estudios de caso en la materia para Chile y Colombia, los lectores podrán adquirir una visión integral del fenómeno de la corrupción en Latinoamérica. Así mismo, evaluaremos las políticas de transparencia en estos países, desde un enfoque ciudadano y de cambio cultural.
Misión agustina y etnografía de la alteridad. Indígenas y negros del Pacífico sur de Colombia en la obra del sacerdote agustino Bernardo Merizalde, 1921
Authors: Aparicio-Erazo Jorge-Luis
Published: December 2021

Este artículo ofrece una aproximación a las relaciones entre el proyecto misionero y la investigación etnográfica de las sociedades indígenas y negras del Pacífico sur de Colombia en las primeras décadas del siglo XX. Para ello, se toma como objeto de análisis el Estudio de la costa colombiana del Pacífico (1921), del misionero agustino recoleto Bernardo Merizalde del Carmen. Se describen y analizan cinco dimensiones de la vida de los grupos estudiados por el sacerdote: organización social, vivienda y trabajo; cuerpos y vestimentas; el lenguaje; creencias religiosas y espirituales; así como celebraciones. Una aproximación al estudio llevado a cabo por Merizalde contribuye a conocer la historia de la relación entre el Estado y la Iglesia y su papel en la institucionalización del poder en regiones apartadas durante la Hegemonía Conservadora. De igual manera, brinda algunas luces sobre la historia cultural y de la vida cotidiana de los grupos sociales que el misionero estudió, así como información acerca de la prehistoria del pensamiento antropológico y de las prácticas etnográficas que tuvieron un papel clave en la representación de alteridades a comienzos del siglo XX.
Enfriamiento de café pergamino seco a granel utilizando aireación mecánica controlada
Authors: Ospina M. Julio E. , Cruz Mery Cecilia , Trejos Ricardo A.
Published: December 2021

Con el fin de garantizar que el café almacenado a granel conserve su calidad durante el tiempo necesario de almacenamiento, se estudió el enfriamiento del café pergamino seco en silos experimentales de dimensiones: 0.5m x 0.5m y 2.8 m de altura, utilizando aire enfriado mecánicamente. Los rangos estudiados fueron: temperatura de 10 a 22°C, humedad relativa de 66 a 98% y contenido de humedad del grano de 8 a 13.57% b.h. Durante la etapa de almacenamiento se evaluó la variación de la calidad del café según los criterios de coloración de la almendra, población de microorganismos y prueba de taza; paralelamente se dejaron muestras almacenadas en sacos a las condiciones de Chinchiná, como muestra testigo buscando determinar la bondad del almacenamiento a granel, también se dejó un silo sin aireación para determinar el efecto de la aireación controlada en la calidad del café.
Utilización de matrices dispersas en el Método de los Elementos Finitos
Authors: Natale Primero Gino , García Núñez Jesús Rafael , Correa Arroyave Alvaro
Published: December 2021

El presente es el primero de una serie de artículos relacionados con el tema de los Elementos Finitos y su aplicación en el campo de la ingeniería, y en particular de la Ingeniería Geotécnica, que publicaremos en esta sección.
En el primero de ellos estamos presentando el método ilustrándolo con un ejemplo muy sencillo en el que se determinan los esfuerzos de una viga constituida por un material CHILE bajo el supuesto de deformaciones planas y esfuerzos biaxiales.
La finalidad de este primer artículo es mostrar las ventajas que ofrecen las matrices dispersas para el manejo de la matriz banda que genera un tipo de problemas como el planteado, frente a los sistemas tradicionales de Choleski-Jordan y Gauss-Seidel, entre otros.
Posteriores artículos ilustraran el método para materiales CHOLE (Continuos, Homogéneos, Ortotrópicos y linealmente elásticos) y otros tipos de materiales en donde el comportamiento elástico no cumple con la linearidad.
Elementos del impacto ambiental, producido por los deslizamientos de taludes viales colombianos
Authors: Beltrán Moreno Lisandro , Aya Rodríguez Jorge Eduardo , Camargo Chávez Mauricio Hernán
Published: December 2021

Las características orográficas, climáticas y geotécnicas, junto con las condiciones impuestas por el tipo y el nivel de desarrollo en el territorio colombiano favorecen la ocurrencia de los deslizamientos. Durante las épocas de invierno se producen numerosos y a veces grandes movimiento en masa en los taludes viales, causando notables pérdidas físicas y económicas.
Para reducirlas se pueden mejorar los procedimientos seguidos durante el diseño, la interventoría, y la construcción. En este artículo se describen aquellos factores y condiciones que favorecen la ocurrencia de los movimientos en masa, se mencionan las características de estos últimos determinadas mediante un inventario reciente, se indican las deficiencias actuales más notorias que se encuentran en el diseño y en la construcción de carreteras, y se incluyen informaciones sobre costos parciales de los daños ocasionados por los derrumbes de los taludes viales. Este trabajo fue publicado en las memorias del IV Congreso Colombiano de Geotecnia, que se realizó en Bogotá, entre el 20 y 23 de agosto de 1991.
Efectos del tratamiento térmico en la fractura de aceros
Authors: Hernández A. Héctor
Published: December 2021

No obstante de los avances logrados en otros tipos de aleaciones, los aceros se siguen utilizando en forma extensiva en la construcción de elementos estructurales, porque con una adecuada selección y tratamiento técnico, los aceros permiten obtener una conveniente combinación de propiedades mecánicas ante unas exigencias específicas de servicio. La fractura en elementos de máquinas frecuentemente se encuentra asociada a una discontinuidad, la cual provoca una concentración de esfuerzo, lo que puede originar sitios de iniciación de una falla por fractura. La carga límite de fractura es afectada por parámetros geométricos, naturaleza y tipo de carga y propiedades mecánicas del material. La mayoría de fallas por fractura de elementos de máquinas son fallas por fatiga; por lo general una fractura por fatiga tiene lugar por una progresiva generación y crecimiento de grietas hasta obtenerse una condición crítica de fractura súbita de la sección residual resistente. Frecuentemente en una fractura por fatiga se observan marcas de playa, las cuales son evidencias de la posición del frente de grietas antes que se alcance la condición de fractura súbita final. En este trabajo se muestra como el tratamiento térmico de temple y revenido de los aceros afecta el esfuerzo límite de falla por fractura para carga de tracción estática y carga de fatiga uniaxial con la presencia de una entalla severa. También se estudia el efecto del tratamiento térmico en la tenacidad de fractura, propiedad que cuantifica la resistencia al crecimiento súbito de una grieta bajo carga estática.
Desarrollo de un equipo de tambores rotatorios para la fermentación de subproductos agroindustriales en medio sólido
Authors: Duarte T. Alberto , Buitrago H. Gustavo
Published: December 2021

Actualmente, ante la carencia de una alternativa para la utilización de los subproductos agroindustriales, uno de los mayores problemas afrontados por nuestro país es la contaminación ambiental producida por la disposición de estos residuos. Una solución es la conversión de los subproductos, mediante fermentación en medio sólido, en materias primas de los procesos de elaboración de alimentos para animales.
La información sobre este tipo de fermentación y sobre el diseño y disponibilidad de equipos para la realización de estudios confiables y reproducibles es escasa. Por esta razón, y con el propósito adicional de estimular la línea de investigación sobre tratamiento de residuos agroindustriales, el Instituto de Biotecnología de la Universidad Nacional de Colombia, apoyado por la Organización de Estados Americanos (OEA) y Colciencias, decidió emprender el diseño, construcción, caracterización y operación de un equipo de tambores rotatorios. El presente artículo es un resumen de las diferentes etapas de la investigación, donde se describen el comportamiento del equipo y los resultados obtenidos en la fermentación de pulpa de café.
Potencia en máquinas agrícolas
Authors: Chaparro Castro José Manuel
Published: December 2021

La potencia generada por los motores de los tractores debe ser utilizada correctamente, cuando se usa en la operación de implementos. Se pretende en este artículo dar una visión teórica del concepto de potencia en máquinas agrícolas, los ensayos de tractores y los requerimientos de energía de diferentes implementos en función de su ancho de operación.
Patrones de resistencia en agentes bacterianos involucrados en otitis caninas en Medellín, Colombia, durante 2019: análisis retrospectivo
Authors: Duque M. , Uribe N. , Buitrago J.
Published: December 2021

Dentro de los agentes patógenos en los procesos otíticos bacterianos, se destacan microorganismos como Staphylococcus pseudintermedius, Pseudomona auriginosa, Proteus mirabilis, Escherichia coli, Corynebacterium spp., Enterococcus spp., y Streptococcus spp., para los cuales se ha descrito resistencia frente a los antibióticos empleados para combatirlos. En Colombia son pocos los reportes acerca de la resistencia antibiótica de microorganismos causantes de otitis. Por ello, el objetivo de esta investigación fue determinar los agentes bacterianos más frecuentemente aislados en infecciones otíticas de caninos remitidas a un laboratorio veterinario de Medellín durante el 2019 y su resistencia a antibióticos. Para llevarlo a cabo, se realizó un estudio descriptivo transversal retrospectivo. Se analizaron los resultados de los antibiogramas realizados a partir de cultivos bacterianos en muestras óticas remitidas a un laboratorio de referencia de la ciudad de Medellín. Además, se efectuó un análisis de frecuencias para la muestra total. Se encontró que los principales microorganismos bacterianos aislados fueron Staphylococcus pseudintermedius, Pseudomona auriginosa, Proteus mirabili y Staphylococcus aureus. La gentamicina fue el medicamento que mayor porcentaje de resistencia presentó y la Cefalexina el que menos resistencia presentó. Se pudo concluir que el Staphylococcus pseudintermedius está presente en más del 60% de los casos de otitis bacteriana. Adicionalmente, se observó una variación de la resistencia presentada por los microorganismos en el tiempo. Estos presentaron mayor resistencia ante los antibióticos aminoglucósidos.
Obtención y evaluación de concentrado proteico hidrolizado de residuos animales como alternativa de alimentación en Piaractus brachypomus (Cuvier 1818)
Authors: Garcés Y. J. , Perea C. , Vivas N. J. , Hoyos J. L.
Published: December 2021

En la industria acuícola, se vienen desarrollando acciones encaminadas a buscar fuentes proteicas alternativas palatables y de alto valor biológico para reemplazar las fuentes convencionales. Debido al potencial nutricional de los subproductos animales, se han adoptado tecnologías para su uso, como las técnicas de bioconversión por hidrólisis enzimática. En consecuencia, el objetivo de este estudio fue obtener y evaluar un concentrado de proteína hidrolizada de residuos animales (CPHRA) como alternativa en dietas para Piaractus brachypomus. Las vísceras de los subproductos avícolas se evaluaron utilizando ácido fórmico y vísceras de trucha al 20% para promover la hidrólisis enzimática a un pH más bajo (pH 3,66). El producto resultante se utilizó en la formulación de dietas para determinar coeficiente de digestibilidad aparente (CDA) de energía y nutrientes, utilizando una dieta control () y tres dietas con inclusión de 10%, 20% y 30% de CPHRA (T1, T2 y T3). Se alimentaron por triplicado ciento veinte juveniles de híbridos de cachama blanca con un peso promedio de 145 ± 3,0 g. La CPHRA presentó alto contenido proteico y se evidenciaron diferencias significativas (p < 0,05) para los CDA de materia seca, proteína bruta, grasa bruta, energía bruta y absorción de cenizas, calcio y fósforo. Los CDA de nutrientes y energía estaban por encima del 80%. En consecuencia, el concentrado de proteína hidrolizada de los desechos de aves de corral tiene un gran potencial como alternativa proteica y energética de alto valor nutricional en la alimentación de los peces.
La pacha-muña (Hedeoma mandoniana Wedd), medicina ancestral en pobladores de Huánuco, Perú
Authors: Bustamante Paulino Niceforo , Aliaga Camarena Raúl Jorge , Guerra Carhuapoma Teresa
Published: December 2021

Objetivo Conocer las propiedades curativas de las hojas de la planta medicinal de uso ancestral pacha-muña (Hedeoma mandoniana Wedd) a través de los saberes de los pobladores del área rural de Antajirca y Bomboncocha, del departamento de Huánuco, Perú, y caracterizar su composición química.
Métodos Estudio con enfoque mixto, de corte cualitativo mediante entrevistas orales no estructuradas sobre el uso y propiedades curativas de la pacha-muña a 10 mujeres trabajadoras informales, de los poblados rurales de Antajirca y Bomboncocha, distrito de Churubamba. El estudio tuvo un enfoque cuantitativo: se recolectaron plantas silvestres para someter sus hojas a extracción con etanol, y exponer el extracto a ensayos cualitativos como Shinoda, cloruro férrico, prueba de espumas, de Fehling, entre otros. Se aplicó también la técnica de destilación por arrastre con vapor, para extraer el aceite esencial, el cual se sometió a cromatografía de gases acoplada a espectrometría de masas.
Resultados La pacha-muña, planta ampliamente utilizada por los pobladores de la región, es consumida en infusión para sanar problemas digestivos (diarreas, acidez estomacal, halitosis, indigestión, cólicos), enfermedades respiratorias (gripes, bronquitis, asma), entre otras. Se encontró que las hojas están compuestas principalmente por flavonoides, taninos, fenoles y pulegone.
Conclusión La pacha-muña, es una hierba aromática ampliamente utilizada por los pobladores de Huánuco, como una herencia cultural de alto valor medicinal, con efectos curati- vos explicados por la presencia de flavonoides, taninos, fenoles y pulegone.
Implementation of kinetic mechanisms of methane combustion by example of expanding functionality of physicochemical libraries in conjunction with reactingPimpleCentralFoam solver
Authors: Kononov Dmitry Sergeevich , Gidaspov Vladimir Yurevich , Strijhak Sergei Vladimirovich
Published: December 2021

The possibility of using reduced combustion mechanisms for hydrocarbon fuels in solvers developed and used at ISP RAS is investigated. These mechanisms contain smaller number of stages and substances appearing in them, but they allow obtaining results in a good agreement with experimental data in a much shorter calculation time. The comparison is made with the results obtained with using the Moscow Aviation Institute solvers. A modified mechanism of methane combustion is considered. It can be extended to describe the chemical reaction processes in other hydrocarbon-oxygen mixtures. The choice of methane is due to the prospects of this fuel at the present time. As the first test problem, a standard chemFoam is used. This solver was designed to demonstrate the occurrence of chemical reactions in a computational domain consists of one cell only. The ignition delay and the parameter values of the thermodynamic equilibrium state reached are taken as the comparison criteria. The second test problem is the flow modeling in a shock tube after the shock wave has been reflected from the wall. This problem is considered in a three-dimensional domain using the ISP RAS reactingPimpleCentralFoam solver. Results were compared with ones obtained by grid-characteristic and Godunov's methods in one-dimensional nonstationary calculations. The effects of viscosity, thermal conductivity and diffusion are not taken into account. The distributions of the flow parameters behind the reflected shock wave are obtained. Results are analyzed depending on the value of the falling shock wave Mach number. Estimates of the possible application of this reduced mechanism are given.
Methodology for Collecting a Training Dataset for an Intrusion Detection Model
Authors: Getman Aleksandr Igorevich , Goryunov Maxim Nikolaevich , Matskevich Andrey Georgievich , Rybolovlev Dmitry Aleksandrovich
Published: December 2021

The paper discusses the issues of training models for detecting computer attacks based on the use of machine learning methods. The results of the analysis of publicly available training datasets and tools for analyzing network traffic and identifying features of network sessions are presented sequentially. The drawbacks of existing tools and possible errors in the datasets formed with their help are noted. It is concluded that it is necessary to collect own training data in the absence of guarantees of the public datasets reliability and the limited use of pre-trained models in networks with characteristics that differ from the characteristics of the network in which the training traffic was collected. A practical approach to generating training data for computer attack detection models is proposed. The proposed solutions have been tested to evaluate the quality of model training on the collected data and the quality of attack detection in conditions of real network infrastructure.
La recepción del pensamiento filosófico de Antonius Andreae («Doctor Dulcifluus») en el siglo XVI
Authors: Ramis-Barceló Rafael
Published: December 2021

Este artículo estudia la recepción de la fi losofía de Antonius Andreae en el siglo XVI. La centuria, de acuerdo con nuestro parecer, puede dividirse en tres etapas. En la primera (hasta 1520), Andreae aparece como el expositor por excelencia de la metafísica de Escoto y uno de los más importantes intérpretes de la lógica y de la física. Desde 1520 a 1570, la difusión de Andreae (como la del escotismo) queda restringida a la Universidad de Padua y alrededores. Desde 1570, hay una revitalización del escotismo, especialmente en Italia y la Península Ibérica, y los autores buscan un diálogo con toda la tradición escotista, en la cual Andreae es el primer representante.
The Effect of Implant Length and Diameter on Stress Distribution of Tooth-Implant and Implant Supported Fixed Prostheses: An In Vitro Finite Element Analysis Study
Authors: Naguib Ghada H. , Hashem Abou Bakr H. , Natto Zuhair S. , Abougazia Ahmed O. , Mously Hisham A. , Hamed Mohamed T.
Published: December 2021

The aim of this study is to evaluate the effectiveness of the implant diameter and length on force dissemination of tooth-implant and implant retained fixed restorations. A finite analysis model was used via a 3D simulation of a unilateral mandibular Kennedy Class I arch. Through thresholding the resultant assembly, a region of interest was selected from the computed tomography (CT) scan. Details of the diameter (D) and length (L) of implant were introduced. Ds used were 3.7, 4.7, and 5.7, while Ls used were 10, 11.5, and 13. The constant was the use of rigid connectors in both designs (implant-implant and implant-tooth fixed partial dentures [FPDs]) and the mesial implant (D 3.7 and L 11.5). Stress in cancellous bone around mesial abutment, which is the second premolar in tooth-implant FPD and mesial implant in the implant-implant FPD, revealed that the stress was significantly lower in tooth-implant FPD when compared with implant-implant FPD (21.1 ± 0.00 vs 46.1 ± 0.00, P < .001). Stress distribution in the bone around any implant depends on several factors such as diameter, length, and tooth-implant vs implant-implant support. The implant diameter was more significant for improved stress distribution than implant length. A moderate increase in the length of the implant consequently reduced stress.
Accuracy of Different Surgical Guide Designs for Static Computer-Assisted Implant Surgery: An In Vitro Study
Authors: Wu Yu Tsung , Papaspyridakos Panos , Kang Kiho , Finkelman Matthew , Kudara Yukio , De Souza Andre B.
Published: December 2021

The aims of this study were to evaluate the effect of (1) the different surgical guide designs and (2) implant placement location on the accuracy of fully guided implant placement in single edentulous sites using an in vitro study model. Forty-five partially edentulous models were scanned and divided into 3 groups: group 1, tooth-supported full-arch surgical guide; group 2, 3 different tooth-supported shortened surgical guides (SSGs); and group 3, tooth-supported full-arch surgical guide with a crossbar. All surgical guides were printed and used for fully guided implant placement. A total of 180 implants (60 per group) were placed, and scan bodies were positioned on all models, and postoperative surface scan files (STL) files were obtained. Superimposition of preoperative and postoperative STL files was performed, and the accuracy of implant position was evaluated. The interaction between group and implant location was statistically significant for angle, 3D offset at the base, and at the tip (P < .001). The post-hoc tests showed a statistically significantly higher deviation for group 2 compared to group 3 for all outcomes for implants #4 (P < .05) and #7 (P < .05). There was also a statistically significant difference in all outcomes between groups 1 and 3 for implant #7 (P < .05). All surgical guide designs presented satisfactory performance with clinically acceptable levels of deviation. However, SSGs presented higher accuracy for guided implant placement in a single-edentulous site, whereas a full-arch surgical guide with a crossbar presented superior outcomes when 2 or more guided implants were placed simultaneously.
7th Session of the International School of Feed
Authors: FIHURSKA Liudmyla
Published: December 2021

On July 5-10, 2021 in Odessa, the Seventh Session of the International School of Feed "The art of improving the technology, safety and quality of compound feed" was already held with great success. The organizer of the event was the Odessa National Academy of Food Technologies, the Association "Union of Ukrainian Feed Producers", with the support of the "Club of Young Scientists ONAFT".
BIOTECHNOLOGY OF SOYA MULTI-COMPONENT FUNCTIONAL INGREDIENTS
Authors: Trufkati L.V. , Kaprelyants L.V. , Pozhitkova L.G.
Published: December 2021

The materials of the article present analytical and scientific-practical results of research of soy multi-component functional ingredients. Soy extract (or soy milk) is a valuable and cheap source of protein and other nutritious and biologically active components, like lipids, vitamins, mineral elements, isoflavones, flavonoids, saponins etc. But the presence of indigestible oligosaccharides and a bean flavor limit the consumption of soy milk. The soy oligosaccharides are known to be prebiotic for intestinal microbiota, particularly for probiotic microorganisms that hydrolyze them with the enzyme α-galactosidase. Isoflavones are known as phytoestrogens since they are similar to human estrogen in structure and function, and are recommended to prevent many hormonedependent diseases. In soy beans and unfermented soy products, isoflavones are present mainly as biologically inactive glycoside conjugates. Biologically active aglycones of soy isoflavones are substances that are assimilated by human organism from soy products faster and in higher amounts than their corresponding glycosides. The members of intestinal microbiota are predicted to play an important role also in the metabolism and bioavailability of isoflavones since they, synthesizing β-glycosidase, cause hydrolysis of glycoside components, thus releasing the bioavailable and biologically active form of aglycone. In this work, we estimated the potential of some Lactobacillus and Bifidobacterium strains to synthesize α-galactosidase and β-glycosidase, and to reduce respectively the amount of galactooligosaccharides and to convert isoflavones into their active forms, when growing in soy milk. Simultaneously, the profile of soy milk fermentation by the chosen probiotics was studied, as well as the proteolytic activity and accumulation of lactic acid by those probiotics, i. e. the possibility to produce soy-based polyfunctional fermented food products was investigated.
PROSPECTS FOR THE DEVELOPMENT OF FEED PRODUCTION FOR FUR ANIMALS
Authors: Iegorov B. , Makarynska A. , Voietska О. , Tsiundyk O.
Published: December 2021

The article considers the species of fur animals bred in Ukraine. The volumes of fur production and the number of animal farms in the world and Ukraine are analyzed, of which Denmark, China and Poland are in the top three. The share in the total volume of fur production in Ukraine is only 1%. Domestic enterprises for breeding fur animals, which keep about 700 thousand minks in industrial conditions, are considered.The structure of the gastrointestinal tract of carnivorous and herbivorous fur animals, their consumption of nutrients and biologically active substances in feed were analyzed. Features of feeding fur animals are determined by the seasonality of vital functions, which determines changes in metabolism and nutritional value of feed. The importance of access to fresh drinking water in the diets of carnivorous fur animals is considered.The necessity of production of compound feeds for fur animals, which meet the norms of feeding and restrictions on the introduction of components, is substantiated.The need of fur-bearing animals in nutrients and biologically active substances for the production of high-quality nutritious compound feeds, for obtaining high-quality shine and density of fur, better digestibility by the body is shown. The ratios of digestible nutrients in the diets of minks of domestic and Scandinavian breeds are given, the percentage of metabolic energy in different feeding periods is given. The low percentage of compound feed production for fur farming is substantiated.Types of compound feeds and their advantages are presented. Technological methods of production of compound feeds for fur animals such as extrusion, expansion and granulation with the introduction of fat into the press granulator are analyzed. Finished feed should be solid and have a granule size of 4.5… 5 mm for grinding cutters, with high nutritional properties and biological value, and improved sanitation. Thanks to modern technologies, harmful microflora is disinfected and shelf life is increased.The state of domestic feed mills for the production of quality feed for fur animals is analyzed. Thanks to the emergence of new recipes and compliance with feeding standards, the technology of compound feed production for fur farming is being improved.
On homotopy nilpotency of some suspended spaces
Authors: Golasinski Marek
Published: December 2021

A homological criterium from [Golasiński, M., On homotopy nilpotency of loop spaces of Moore spaces, Canad. Math. Bull. (2021), 1–12] is applied to investigate the homotopy nilpotency of some suspended spaces. We investigate the homotopy nilpotency of the wedge sum and smash products of Moore spaces M (A, n) with n ≥ 1. The homotopy nilpotency of homological spheres are studied as well.
Migration and migratory communities in the focus of memory studies
Authors:   Financial University under the Government of Russian Federation, Linchenko A. A.
Published: December 2021

The article is devoted to the analysis of the specificity and transformation of the research field of the collective memory of migratory communities. It was shown that the era of multiculturalism, which contributed not only to an increase in the number of studies, but also to the expansion of the very aspects of the study of the topic, played a key role in the study of the memory of migratory communities. Three main areas of research were identified and analyzed: a) personal and group memories of migration, as well as the specificity of the collective memory of various migration groups; b) the study of collective perceptions of the past of migrants in the context of the politics of incorporation and the politics of memory of host societies; c) study of the representation of the historical experience of migrations and migratory communities in museum practice. The idea was substantiated that the theoretical and practical potential of addressing the memory of migratory communities contributed not only to the transformation of the research optics of memory studies, but also showed the inevitability of significant changes in the understanding of ontology of collective memory. This found expression in the actualization of the transcultural turn, focused on overcoming methodological nationalism and considering collective memory not only within the framework of certain cultures or communities, but also it’s dynamic beyond cultural and social boundaries. The article analyzes the significance of the transcultural turn for research into the collective memory of migrants.
Relational ambivalence: Exploring the social and discursive dimensions of ambivalence – The case of Turkish aging labor migrants
Authors:   University of Vienna, Palmberger M. ,   University of Leuven
Published: December 2021

Many of Vienna’s labor migrants who entered Austria as so-called “guest workers” together with their spouses long nurtured the dream of returning to their country of origin, at the latest when they retired. By then, however, returning became less than straightforward leading to ambivalence regarding questions of belonging/return and transnational mobility and late-life care. Based on rich qualitative data, in this article, I show that ambivalences are found in the complexity of migrants’ narratives, particularly in the way they (1) reassess past choices, (2) negotiate feelings of belonging, and (3) assess future options for late life and care. I argue that the social dimension of ambivalence, which I term “relational ambivalence,” is crucial to understanding the labor migrants’ experiences, reflections, and choices. The analysis shows that ambivalence must be understood as a product of relationships rather than solely an individual experience. The concept of relational ambivalence captures these social and discursive dimensions of ambivalence. The article ultimately carves out the particularity of ambivalence in the general context of migration and in the specific context of Vienna’s labor migrants, while accepting feelings of ambivalence or the simultaneity of different, opposing positions in one and the same person as a core human experience.
Green Belts and the Improving of Air Quality - CASE STUDY: Timisoara and its Surroundings
Authors: BICA Smaranda , RADOSLAV Radu , NICOLAU Iasmina
Published: December 2021

The paper proposes an efficient network of forest belts that can fulfil the multiple roles characteristic to a well-designed intervention: protecting the city against agricultural dust, noise protection, air filtration, stabilization of land, improvement of the quality of agricultural products when growing in protected areas, conservation of the biodiversity following the relief, climate and hydrographical conditions and the development of agricultural landscape. This last goal is very important as in the vicinity of Timisoara one has little natural landscape attractions. The paper also aims to establish a favourable ratio intervention / costs, leading to the actual implementation of the proposal in a short time to have concrete results. The main research methods used are bibliographic documentation, analysis of sampled data provided by institutions in the field and simulation, in order to determine the optimum size of the forest belts for an efficient protection against agricultural dust and other major pollutants which arise from the surroundings of the city. The paper sets a proposal of practical solutions to improve air quality and decrease negative effects on public health due to high levels of allergens coming from plants on vacant lots as well as agricultural plots.Green belts are accessible ways to improve the quality of the environment of a city and its surroundings. The success of these methods also depends on the existence of programs and organizations that promote measures in the field.
Urban Sprawl and its Effects on Environment and Farmland a Timisoara Case Study
Authors: BICA Smaranda , BELCI Diana
Published: December 2021

Urban sprawl has been plaguing Western European and American cities for the last 70 years. One has fought against this phenomenon all over the world with a combination of strategic planning and urban regulations, focusing on growth management, sustainable development and preservation of farmland. East European cities, Romanian cities included, have been rapaciously consuming the free natural and agricultural land around them, without long-term development policies. The aim of this paper is analyzing urban sprawl around Timișoara and finding efficient ways of economizing urban and rural land. The article is based on several urban studies, statistical and traffic data showing the magnitude of the phenomenon and its dramatic effects on the environment.The European Union required to recent members to follow the path set by the developed countries, even if their economies have a system more or less centralized inherited from communism. It is still unclear who should be responsible for urban planning; the rules and regulations are made along the way, while the investorsâ€™ pressure is huge. Meanwhile extended rural and agricultural land might be destroyed. Most politicians do not acknowledge this problem as they approve further expansion into farmland without any previous planning. This paper might be just tackling this subject, but its target should be making urban sprawl more visible, understanding its dimension and dramatic effects around Romanian cities.
The Altitudinal Gradient Influence on the Parameters of the Mountain Grasslands
Authors: SAMFIRA Ionel , MARUSCA Teodor , GHICA Andreea , BOLDEA Marius , Branko CUPINA
Published: December 2021

The aim of the paper is to assess the influence of the altitudinal gradient on the quality and biodiversity of grasslands in the mountainous area Muntele Mic. We studied various types of grasslands found at different altitudes as 613, 1342 and 1562 m. For each of them, we studied: the type of grassland, structure of vegetation, pastoral value (VP), Shannon biodiversity index, as well as autecological vegetation index. We determined the climatic factors through the average values of temperature and precipitations, and the edaphic characteristics of the substratum: pH value, clay content, humus content and phosphorus content. The main results indicate that the structural parameters of the ecosystems of mountain grasslands under study are strongly influenced by the altitudinal gradient. Studies such as this will allow of future modellation of the dynamics in the evolution of the quality and biodiversity in mountain grasslands in relation to the altitude. In its turn, this modellation will serve as an element of orientation for correct management of mountain grasslands.
Studies Regarding Comparative Analysis of Main Working Indicators at Primary Soil
Authors: STÄ‚NILÄ‚ Sorin , DROCAȘ Ioan , RANTA Ovidiu , MOLNAR Adrian , NAGY Mihaela
Published: December 2021

The primary soil tillage's are the most energetic consumer. Therefore, depending to agro technical conditions, it is necessary to use adequate working tools in order to reduce energetic consumptions. For primary soil tillage, we used different tools: moldboard plough, chisel plough, paraplaw and heavy harrow disk. For those tools, we determined the main working indicators and compared them which other to establish the best working tool in order to reduce energetic consumptions by keeping agro technical requirements.