bluuebunny/crossref_metadata_2025 huggingface dataset:
The Reliability of Fishman and Nolla Methods in Prediction of Chronological Age of Yemeni Children
Authors: Alqadi Maktoom Abdulrakeeb , Abuaffan Amal H
Published: December 2021

Objective: This cross-sectional school based study aimed to assess the reliability of Fishman and Nolla methods in predicting the chronological age for Yemeni children. Material and Methods: Orthopantomographs and left handwrist radiographs were taken for 358 Yemeni children (193 boys and 165 girls) 8 - 16 years. Skeletal age estimated by Fishman method and dental age estimated by Nolla method were compared to chronological age using SPSS version 21, statistical significance was predetermined at P < 0.05 , using Intraclass Correlation Coefficient- ICC and Wilcoxon signed rank test. Results: The mean chronological, skeletal and dental ages were 12.00 ± 2.25 years, 12.39 ± 1.65 years and 11.32 ± 2.65 years, respectively. Intraclass correlation coefficient showed strong correlation between chronological age and skeletal and dental ages. Wilcoxon test showed Fishman method significantly underestimated the chronological age by 0.44 ± 1.26 years in boys and non-significantly underestimated the chronological age by 0.02 ± 1.08 years in girls. Nolla method significantly underestimated the chronological age by 0.59 ± 1.28 years in boys and 0.78 ± 1.21 years in girls. Conclusions: Chronological age of Yemeni children is highly correlated to skeletal age estimated by Fishman method and dental age estimated by Nolla method. However, the two methods underestimate the chronological age of Yemeni children.KeywordsAge determination by teeth; Orthodontics; Age determination by skeleton; Forensic dentistry; Yemen.
Prediction of Bubble Point Pressure Using Artificial Neural Networks in the Niger Delta
Authors: Idika Uduma U.
Published: December 2021

A model was developed to predict the bubble point pressure of saturated reservoirs. The model was based on artificial neural networks and was developed using 700 generic data sets which are representative of the Niger Delta region of Nigeria. The data set was first cleaned to remove erroneous and repeated data points. After cleaning, 618 data points were remaining. Of the 618 data points, 463 were used to train the ANN model, 93 were used to cross-validate the relationships established during the training process and the remaining 62 were used to test the model to evaluate its accuracy. A backward propagation network utilizing the LM algorithm was used in developing the model. The first layer consisted of four neurons representing the input values of reservoir temperature, API oil gravity, gas specific gravity, and solution GOR. The second (hidden) layer consisted of 26 neurons, and the third layer contained one neuron representing the output value of the bubble point pressure. The results showed that the developed model provides better predictions and higher accuracy than the existing empirical correlations considered when exposed to an additional 13 data points which were unseen by the model during its development. The model provided predictions of the bubble point pressure with an absolute average percent error of 3.98%, RMSE of 177.6479 and correlation coefficient of 0.9851. Trend analysis was performed to check the behavior of the predicted values of P_b for any change in reservoir temperature, oil API gravity, gas gravity and solution GOR. The model was found to be physically correct. Its stability indicated that it did not overfit the data, implying that it was successfully trained.
Characteristics of Libido and Testosterone Concentration of Polled and Horned Bali Bulls after GnRH Injection
Authors: Hasbi Hasbi , Sonjaya Herry , Baco Sudirman , Amalia Reski , Gustina Sri
Published: December 2021

Bali cattle are one of the original Indonesian germplasm, which in its development were found to be hornless or polled. Polled are Balinese cattle whose horns do not grow naturally, but have the same characteristics as those with horns. However, there are indications that polled have a lower libido. The purpose of this study was to determine the characteristics of libido and testosterone concentration after gonadotrophin releasing hormone (GnRH) injection. In this study each of 7 male polled and horned Bali cattle aged 3.5-6 years were used. Libido characteristics were observed by recording the first time the male fondled the teaser until ejaculation, while the testosterone concentration was measured using blood plasma taken on day 0 or before injection, day 7th, and day 14th after GnRH injection. Testosterone analysis used enzyme linked immunosorbent assay (ELISA) method. The results showed that the libido of polled was not different (P>0.05) compared to that of the horned on the 0, 7th and 14th days after GnRH injection. However, in polled on the 7th day after GnRH injection, it was significantly lower than on day 0 and 14, but on day 0 it was not different with day 14. Testosterone concentration on day 7 after injection of GnRH was not different (P>0.05) compared to day 0 both in polled and horned bulls, but on day 14 after injection was significantly higher (P<0.05) in horned than polled. In conclusion, polled and horned Bali bulls had high libido with a score of +1, but on the 7th day after GnRH injection, polled had lower libido than horns. The testosterone concentrations of polled and horned on day 7 after GnRH injection were not different compared to day 0, while the 14th day was higher in horned bull.
Ironisch gestimmt?
Authors: Burghardt Anja
Published: December 2021

Anja Burghardt geht in ihrem Beitrag der Frage nach, inwiefern das Stilmittel der Ironie Werte hervortreten lässt. In ihrer Analyse des Spektrums an Spielarten von Ironie, Witz und Humor in Sowackis "Reise ins Heilige Land von Neapel" ruckt die Bedeutung der Stimme in den Blick, die in diesem Poem ein Sprechen inszeniert, ohne dass der Sprecher als Individuum bzw. charakterisierbare Figur greifbar wurde.
Computed tomographic features of third eyelid gland adenocarcinoma in a dog: a case report
Authors: Cho Hyun , Yoon Wonkyoung , Cho Kyoung-Oh , Baek Yeong-Bin , Choi Jihye
Published: December 2021

A 15-year-old Schnauzer, showing right exophthalmos, was diagnosed as adenocarcinoma originated from the third eyelid gland. On computed tomography, a normal right third eyelid gland was not observed. Instead, a heterogeneous cystic mass invaded the retrobulbar space and displaced the eye globe dorsolaterally. In addition, lysis of the bony nasolacrimal duct was found, which was considered the tumor invasion. These findings indicated that third eyelid gland adenocarcinoma should be considered when a retrobulbar mass is found ventromedial to the globe without observation of the normal third eyelid and accompanies osteolysis of the bony nasolacrimal duct in dogs showing exophthalmos.
Wymiany wirtualne jako forma kształcenia wspierająca rozwój umiejętności interakcji online
Authors: Pieczka Anna
Published: December 2021

Postępująca globalizacja i coraz powszechniejszy dostęp do internetu sprawia, że interakcje między uczącymi się języków obcych zachodzą już nie tylko w formie bezpośredniej, ale także online. Taka forma komunikacji charakteryzuje się specyficznymi właściwościami i wymaga odmiennych od tradycyjnych form nauczania. W niniejszym artykule ukazano, jak nowoczesna forma uczenia się, jaką jest udział w wymianach wirtualnych, pozwala na wykorzystywanie umiejętności charakterystycznych dla interakcji online określonych w dokumencie CEFR Companion Volume. Zaprezentowane badanie oparte jest na danych zebranych podczas polsko-włoskiej wymiany wirtualnej przeprowadzonej między Uniwersytetem w Turynie a Uniwersytetem Marii Curie-Skłodowskiej w Lublinie. Analiza ilościowo-jakościowa wypowiedzi studentów uczących się języka włoskiego na poziomie A1, zgromadzonych podczas projektu, pozwoliła na stwierdzenie, że udział w wymianie wirtualnej był dla studentów okazją do wykorzystania różnorodnych umiejętności związanych z rozmową i dyskusją online, zdefiniowanych w dokumencie CERF Companion Volume. Wyniki badania wskazują ponadto, że ilość wypowiedzi uczestników projektu przewyższała minimum konieczne do zrealizowania wyznaczonych zadań oraz, że wykazali się oni wieloma kompetencjami w zakresie interakcji online przyporządkowanymi poziomowi A2, a więc przewyższającymi ich poziom biegłości językowej w zakresie języka włoskiego. Na tej podstawie można stwierdzić, że wymiany wirtualne są dla studentów angażującą formą nauki nawet na najniższym poziomie językowym, która pozwala realizować ich potencjał komunikowania się w języku docelowym, z wykorzystaniem umiejętności interakcji online.
Samoświadomość metakognitywna w kształceniu sprawności pisania na studiach neofilologicznych. Na przykładzie italianistyki Uniwersytetu Wrocławskiego
Authors: Grabowska Monika , Zapłotna Agata
Published: December 2021

The paper  presents the results of a survey conducted in the academic year 2018/2019 among students of Italian Studies at the University of Wroclaw on metacognitive self-consciousness concerning Italian writing proficiency. The questions concerned the students' practice of written forms of expression in their private lives; the contribution (actual or anticipated) of writing proficiency in their current and future professional career; and the evaluation of the teaching of writing proficiency within the university curriculum of Italian Studies. The study was qualitative and conducted from an emic perspective, involving students in metacognitive reflection. The results of the study indicate limited metacognitive self-consciousness on the part of the students of Italian Studies, who are not, however, devoid of any criticism of the practical Italian language course curriculum.
Eleatic Ontology in Aristotle: Introduction
Authors: Bronstein David , Mié Fabián
Published: December 2021

The introduction summarizes the six new papers collected in Volume 1, Tome 5: Eleatic Ontology and Aristotle. The papers take a fresh look at virtually every aspect of Aristotle’s engagement with Eleaticism. They are particularly concerned with Aristotle’s responses to Parmenidean monism, the Eleatic rejection of change, and Zeno’s paradoxes. The contributions also focus on the ways in which Aristotle developed several of his own theories in metaphysics and natural science partly in reaction to Eleatic puzzles and arguments.
Hur skapas en rebelltjej på svenska?
Authors: Mossberg Mari
Published: December 2021

What’s a Rebel Girl in Swedish? On the Translation of Elena Favilli and Francesca Cavallo’s Good Night Stories for Rebel Girls

Abstract: This article investigates the translation of Good Night Stories for Rebel Girls: 100 Tales of Extraordinary Women, a children’s book written and published by Elena Favilli and Francesca Cavallo in 2016. Within the framework of Gideon Toury’s Descriptive Translation Studies and Katharina Reiss’ text typology, the study focuses on the Swedish translation Godnattsagor för rebelltjejer: 100 berättelser om fantastiska kvinnor from 2017, including comparisons with the Danish, French, and Norwegian translations, with a view to discover the differences between the text versions. Analysis shows that the Swedish translation is less source-text dependent than the other translations, downplaying the fairytalization of the stories and tending to strengthen the informative component of the text. Poetic language and metaphors are less apparent in the Swedish translation, while hedging, explicitation as well as specification of time, place and chronology contribute to making the text more factual. A further finding is that more adult language is used in the Swedish translation. The article ends by summarizing the main findings and discussing a few explanations for the adaptation of the Swedish translation with regard to its target language context.
Philip Nel, Lissa Paul & Nina Christensen (red.), Keywords for Children's Literature
Authors: Lassén-Seger Maria
Published: December 2021

Review/Recension
Mayako Murai & Luciana Cardi (red.), Re-Orienting the Fairy Tale: Contemporary Adaptations across Cultures
Authors: Gutierrez Anna Katrina
Published: December 2021

Review/Recension
Introduction: “Poetry for Children and Youth”
Authors: Alfredsson Johan , Skaret Anne
Published: December 2021

Introduction: “Poetry for Children and Youth”
Nitrogen Deposition in Different Mediterranean Forest Types along the Eastern Adriatic Coast
Authors: Lovreškov Lucija , Limić Ivan , Butorac Lukrecija , Jakovljević Tamara
Published: December 2021

Mediterranean forests along the eastern Adriatic coast have an important ecological role. However, few studies have been conducted on nitrogen deposition so far. To improve this knowledge, the main aims of our study were: (i) to estimate nitrogen inputs and determine differences among the four Mediterranean forests, (ii) to determine the seasonal behaviour of N deposition compounds, and (iii) to discuss the results in relation to forest type and precipitation. Measurements were carried out over a two-year period on four plots in two regions: holm oak and pubescent oak in Istria, Aleppo pine and black pine in Dalmatia. Bulk open field and throughfall deposition were sampled with continuously exposed collectors. Measurements, analyses and data validation of precipitation and N compounds were carried out. The results showed that the highest average monthly precipitation was recorded in the black pine plot and the lowest in the Aleppo pine plot. Nitrate and ammonia in conifer plots in throughfall samples were lower than in bulk open field samples, indicating possible retention by the tree canopy. The results revealed a higher amount of N deposition collected in broadleaved forests than in conifer forests indicating the washing out of N compounds previously deposited and accumulated in forest canopy. The chemistry of N deposition was strongly influenced by local and anthropogenic sources as well as neighbouring countries. Our results may fill the knowledge gap in understanding the influence of precipitation and seasonality of N compounds in different Mediterranean forest types along the eastern Adriatic coast.
From tensions to transformation: Teaching food systems in a graduate dietetics course
Authors: Ng Eric , Cole Donald C
Published: December 2021

Dietitians are deeply embedded within food systems, so food systems concepts are becoming an essential component of dietetic education in Canada. Yet how can we, as educators, better prepare future dietitians to embrace the complexity of food systems and be forces of change towards equity?  In an effort to explore this question in a practical way, we integrated food systems concepts into a mandatory course of a public health graduate dietetics program. This field report shares our experiences teaching food systems over five years based on our notes kept, student feedback, and course evaluations. Our learnings have been in three key areas: intentions, facilitation, and tensions.

We recognized that teaching about food systems is value-laden. Hence we have been explicit with the students about our positionality and our intentions in designing the course, partly to meet the management of food systems competency requirements, but also to stimulate thinking about alternative options for purpose, structures, and processes in food systems.  Our facilitation approaches aimed to foster a critical consciousness towards social justice and systems change. Using teaching and evaluation methods such as experiential learning, community projects, and reflection assignments, students have encountered the complexity of food systems and the challenges-opportunities they pose. 

As educators, we have grappled with the tensions of challenging dominant positivist discourses in public health nutrition. Politicized topics such as migrant farm-worker regimes, industrial food production, regulation of food marketing, and mitigation of the impact of colonization have generated debates in the classroom about the role and scope of dietetic practice. Most students have situated themselves more explicitly within a food system, and some began to question hidden structures of power. While it remains challenging to address this breadth within the constraints of one course, we believe it worthwhile to model and stimulate critical reflexivity with the next generation of dietitians as critical food learners-teachers themselves. Even though the course is no longer offered using this food systems approach, course components can be integrated throughout the dietetic curriculum.
Theorizing a Catholic Hispanic-Serving Institution (C-HSI) Identity Through Latinx
Theological Lenses of Lo Cotidiano and Traditioning
Authors:   University of Pittsburgh - Main
            Campus, Garcia Gina A. , DeCostanza Jr. John ,   Dominican
            University, Romo Jaqueline ,   Catholic Theological
            Union
Published: December 2021

As the students entering U.S. colleges and universities become increasingly
diverse, the number of Hispanic-Serving Institutions (HSI's) continues to increase.
Catholic colleges and universities, similarly, are seeing an increase in student
diversity on campus, with an emergence of Catholic HSIs as well. As the number of
Catholic colleges and universities in the United States that are HSI-eligible increases
they must grapple with what it means to be both Catholic and Hispanic-serving. The
purpose of this article is to propose a U.S. Catholic HSI (C- HSI) identity that brings
together the extensive literatures on Catholic identity and HSI identity through the
lens of decolonial theory and Latinx theologies. We argue that in order to effectively
serve students of color who have intersectional identities, Catholic HSIs must
intentionally recognize the ways of knowing (epistemologies) and being of these groups,
which includes a collective understanding of the theo-political, social, historical, and
economic forces that have subjugated them since before the founding of the present day
United States and long before the founding of the first Catholic institution in the
country. Building off the Catholic Identity and Mission Models (CIMA) currently used by
the Association of Catholic Colleges and Universities to assess mission integration, we
propose a C-HSI model.
Applying Rerum Novarum towards the Academic Service-Learning (ASL) Reflection
Process for Promoting Ethical Leadership in Post-Secondary Students
Authors:   Fordham University, Davis Henry J.
Published: December 2021

Pope Leo XIII’s encyclical Rerum Novarum is considered one of the first major
works to introduce Catholic social thought on a global level. A key message undergirding
Rerum is the concept of supporting the needs of others, leading to empowerment and
self-sufficiency. The purpose of this study was to create a list of reflection prompts
informed by Rerum for post-secondary students to consider and apply towards their
academic service-learning experiences. Through qualitative analysis, three main themes
related to Rerum’s key message were identified: (a) opportunity to obtain resources; (b)
intrinsic right to continual resources; and, (c) communal support of families and
dependents. These themes were then used to develop eight distinct reflection prompts for
each stage of the service-learning experience; here, the goal is to provide
post-secondary students with a foundation for processing their thoughts and developing
their leadership styles in an ethically-informed manner, grounded in Catholic social
thought.
Building Family Partnerships in a Catholic School by Connecting After-School and
Home with Mathematics
Authors:   National Louis
            University, Cerezci Bilge
Published: December 2021

Parents need guidance, support, and motivation to learn how to support their young
children’s mathematical development in ways that are more foundational and effective.
The In Addition Afterschool Mathematics Program serves 24 students in grades 3, 4, and 5
and their parents in an urban neighborhood at a Catholic elementary school. In the In
Addition Afterschool Mathematics Program, we see families as partners and build our
after-school program around supporting mathematics thinking and discoveries by engaging
the whole family.
Potential in microroughness domain of metal surface employed in cathodic protection mode
Authors:   Frantsevich Institute for Problems of Materials Science of the NAS of Ukraine, Lukovich V. , Kartuzov V. ,   Frantsevich Institute for Problems of Materials Science of the NAS of Ukraine
Published: December 2021

This effort presents the results of investigation of cathodic protection process of a section of the main pipeline, which has been operating in cathodic protection mode for a long time and which insulation has completely exfoliated from metal surface, and a cavity between is filled with water and salt impurities. In this case, a decisive factor is a fact that a metal surface is covered with microroughnesses in the form of protrusions with almost conical shape. The surface is immersed in electrolyte. At the electrolyte-metal interface, a potential difference is formed - a corrosion potential, which creates an unstable equilibrium among the potentials of metal and electrolyte. A mathematical model is designed and implemented into a numerical algorithm and computer program. A computational experiment has been carried out to calculate the potential around microroughness. The model describes a change in potential in this area at incomplete and complete cathodic protection of metal surface. The basis of computational model is a selection of one of metal protrusions of material microheterogeneity and placing it in a cylinder, which diameter coincides with that one of the lower base of this protrusion, and its upper part passes through the apex of the protrusion. Mathematical model equations with corresponding boundary conditions and their discrete implementation are presented. The solution of problems is obtained by iterative procedures based on reference values of protective potential taken from practice. The results of computational experiment are presented in the form of graphs: 1) potential distribution in the field of electrolytes; 2) changes in electrolyte potential at the border with protrusion at different values of polarization potential; 3) changes in polarization resistance in the area (calculated). The geometry of computational domain was also varied, and the values of protective potential were determined to ensure the absence of corrosion. Keywords: corrosion, microroughness, protective potential, plastic current density, electrolyte
Modeling of influence of planar defects on plasticity of powder materials by computational methods of micromechanics
Authors:   Frantsevich Institute for Problems of Materials Science of the NAS of Ukraine, Kuzmov A. , Shtern M. ,   Frantsevich Institute for Problems of Materials Science of the NAS of Ukraine, Korobko P. ,   Frantsevich Institute for Problems of Materials Science of the NAS of Ukraine
Published: December 2021

Based on the energy concept of the critic stress state, a three-parameter model of plasticity of the Cam-Clay type was formulated. For this phenomenological model, the dependences of the determining parameters on the porosity and damage were found by the method of micromechanical averaging on the unit cell corresponding to the porous damaged material of powder origin. The plastic multi-responce (different yield strength in tension and compression) behavior of this material is found by micromechanical averaging on a unit cell. According to the mechanics of composites, the geometry of the cell represents the structure of a heterogeneous material and the boundary conditions on a unit cell make it possible to relate the stress-strain state at the macro- and meso-level. The averaging was carried out by computer simulation using the finite element method with an adaptive mesh, which was automatically condensed in places of a large gradient of the stress-strain state. The structure of the representative cell corresponds to a powder origin material with "imperfect", partially stratified, interparticle contacts. In the proposed model the rheological response of a porous damaged material is specified by three moduli, and the structure of such a material is described by two internal state parameters: porosity and the degree of delamination of interparticle contacts. That is, the rheological moduli are functions of porosity and damage. Accordingly, a number of values of each of the moduli were calculated for a certain discrete range of density and damage. The advantage of this approach is precisely in focusing on powder origin materials and not generally on any damaged materials, which makes it possible to take into account the real structure of the damaged material using the methods of mechanics of microheterogeneous materials. According to the simulation results, in particular, it was found that the yield strength for shear is significantly (30%) less sensitive to damage than the yield strength for uniaxial tension. Keywords: theory of plasticity, powder materials, micromechanics, damaged materials, stress-strain state.
Thermodynamic properties and phase equilibria in alloys of Bi—Tm system
Authors:   Frantsevich Institute for Problems of Materials Science of the NAS of Ukraine, Sudavtsova V. S. , Shevchuk V. A. ,   Frantsevich Institute for Problems of Materials Science of the NAS of Ukraine, Kudin V. G. ,   Taras Shevchenko National University of Kyiv, Ivanov M. I. ,   Frantsevich Institute for Problems of Materials Science of the NAS of Ukraine
Published: December 2021

The thermochemical properties of the melts of the Bi—Tm system at a temperature of 1100 K in the range of compositions 0 ≤ xTm ≤ 0,2 were determined for the first time by the calorimetry method. It is established that the minimum value of the enthalpy of mixing of these liquid alloys is equal to –75,7 ± 0,5 kJ / mol at xTm = 0,65. = = –150,7 ± 16,7 kJ / mol, = –230,9 ± 21,8 kJ / mol. The activities of the components and molar particles of associates were calculated according to the model of an ideal associated solution (IAR), using data on the thermochemical properties of melts of the Bi—Tm system. It was found that the activities of the components in these metallic solutions show very large negative deviations from ideal solutions with a high content of TmBi and Tm2Bi associates. The obtained dependences of the first i i melts of the Bi—Tm system on temperature showed a large steepness of the Bi Bi curve in contrast to the gradual decrease of exothermic values Tm of Tm. This indicates large changes in the structure of the Bi atom with increasing temperature. Excess integral and partial Gibbs energies of Bi-Tm system melt mixing calculated from component activities The absolute values of G in the whole concentration range are smaller than H (G min = –41,8 kJ / mol at xTm = 0,58), and the function G of is more asymmetric, which is caused by the entropy contribution (entropy of mixing of the studied melts is negative, and Smin min = −30,5 J / mol ∙ K at xTm = 0,65). Keywords: thermochemical properties, compounds, melts, Bi, Tm.
Research of oscillation mode in automated pulsed eddy current testing systems
Authors:   Igor Sikorsky Kyiv Polytechnic Institute, Lysenko Iu. Iu. , Kuts Yu. V. ,   Igor Sikorsky Kyiv Polytechnic Institute, Uchanin V. M. ,   Karpenko Physico-Mechanical Institute of the NAS of Ukraine, Petryk V. F. ,   Igor Sikorsky Kyiv Polytechnic Institute
Published: December 2021

The formation and analysis of eddy current probe signals obtained in pulsed excitation mode is considered. The proposed method of implementing pulsed eddy current testing with the formation of attenuating harmonic oscillations is more resistant to the effects of noise and interference that accompany the process of inspected object parameters evaluation. The equivalent scheme of the system “test object–eddy current probe” is developed and analyzed. The obtained mathematical model of the eddy current probe signals allowed proposing the natural frequency and the attenuation as informative signals parameters, which are determined from signals phase and amplitude characteristics. Developed algorithm and the proposed methodology was implemented for evaluation of eddy current signals parameters and related characteristics of testing objects. This method was experimentally verified on a series of different test specimens. The obtained results confirm the possibility to apply the proposed informative signals to solve some problems concerned with automated eddy current testing. The formation and analysis of eddy current probe signals obtained in pulsed excitation mode are considered. The proposed method of implementing pulsed eddy current testing with the formation of attenuating harmonic oscillations is more resistant to the effects of noise and interference that accompany the process of automated eddy current testing. The equivalent scheme of the system “test object–eddy current probe” is developed and analyzed. The obtained mathematical model of the eddy current probe signals allows proposing the natural frequency and the attenuation as informative signals parameters, which are determined from signal phase and amplitude characteristics. Methods of increasing the accuracy of determining the eddy current probe signals attenuation and frequency using trends of signals phase and amplitude characteristics are considered. The proposed signal processing method was verified by modeling the process of determining the eddy current probe signals attenuation and the frequency from the signal with Gaussian noise. Algorithmic and software were developed based on the simulation results and the proposed improved methodology was implemented for determining signals parameters and related parameters and characteristics of testing objects.
Mathematical model of magnetic field for a sectorial ferromagnetic cylinder
Authors:   Karpenko Physico-Mechanical Institute of NAS of Ukraine, Dzhala R. M. , Dzhala V. R. ,   Karpenko Physico-Mechanical Institute of the NAS of Ukraine, Horon B. I. ,   Karpenko Physico-Mechanical Institute of the NAS of Ukraine, Verbenets B. Ya. ,   Karpenko Physico-Mechanical Institute of the NAS of Ukraine
Published: December 2021

The solution of the boundary-value problem of magnetostatics for a circular ferromagnetic cylinder with a longitudinal sectorial cutout is described. The external primary magnetic field is orthogonal to the cylinder and directed at arbitrary azimuth relative to the cutout. A system of algebraic equations for finding the amplitudes of azimuthal expansions of the spatial distribution of the secondary field of the outer and sectorial partial regions of the cylinder is obtained by the method of rearrangement of functions.
Stochastic model of the gearbox pair vibration
Authors:   Karpenko Physico-Mechanical Institute of NAS of Ukraine, Javorskyj І. M. ,   Bydgoszcz University of Sciences and Technology, Bydgoszcz, Poland, Yuzefovych R. M. ,   Karpenko Physico-Mechanical Institute of the NAS of Ukraine,   Lviv Polytechnic National University, Lychak O. V. ,   Karpenko Physico-Mechanical Institute of the NAS of Ukraine, Trokhym G. R. ,   Karpenko Physico-Mechanical Institute of the NAS of Ukraine, Varyvoda M. Z. ,   Karpenko Physico-Mechanical Institute of the NAS of Ukraine
Published: December 2021

The model of vibration signal of gearbox pair in the form of periodically correlated non-stationary random process is considered. It is shown that hidden periodicities in biperiodic correlated random process mean and covariance function, characterizing the vibrations of gearbox pair can be detected using the component and least square methods. Seven particular cases of the bi-rhythmic hidden periodicity for different modulation modes are analyzed.
Median based algorithm for sub-pixel estimation of extrema positions of diffuse light reflection signal
Authors:   Karpenko Physico-Mechanical Institute of NAS of Ukraine, Ivasiv I. B.
Published: December 2021

It has been proposed to utilize the median algorithm for determination of the extrema positions of diffuse light reflectance intensity distribution by a discrete signal of a photodiode linear array. The algorithm formula has been deduced on the base of piecewise-linear interpolation for signal representation by cumulative function. It has been shown that this formula is much simpler for implementation than known centroid algorithm and the noise immune Blais and Rioux detector algorithm. Also, the methodical systematic errors for zero noise as well as the random errors for full common mode additive noises and uncorrelated noises have been estimated and compared for mentioned algorithms. In these terms, the proposed median algorithm is proportionate to Blais and Rioux algorithm and considerably better then centroid algorithm.
O “Escola sem Partido” e a “versão autorizada” da experiência histórica da escravidão nas redes sociais
Authors: Escosteguy Filho João Carlos
Published: December 2021

Este artigo tem como objetivo central analisar os modos pelos quais apoiadores do “Movimento Escola sem Partido” (MESP) abordam a experiência histórica da escravidão em páginas virtuais da rede social Facebook. Tencionamos, com isso, refletir sobre o que apoiadores diretos do movimento entendem como uma “versão autorizada” dessa experiência histórica para ser ensinada nas aulas de história. Por “experiência histórica da escravidão” compreendemos não apenas o escravismo passado, mas também sua herança reiterada nos séculos seguintes à Abolição. Desse modo, este artigo analisará também as formas pelas quais o MESP, em suas franjas virtuais, compreende a relação passado-presente no ensino de história. A partir de exemplos pesquisados, focaremos no modo como as páginas lidaram com a figura da vereadora Marielle Franco e da princesa Isabel para disputas sentidos específicos sobre a história a ser ensinada. Com isso pretendemos contribuir para reflexões sobre as ameaças do MESP a qualquer ensino de história que se pretenda minimamente democrático e emancipatório.
Developing the Test Bench Software for the Technical Inspection of Volumetric Hydraulic Drives
Authors: Sergey V. Pyanzov , Senin Petr V. , Ionov Pavel A. , Stolyarov Aleksey V. , Zemskov Alexander M. , Ilyin Mikhail V. , Kravchenko Igor N.
Published: December 2021

Introduction. The article describes the test bench specialized software, developed for technical inspection of domestic and foreign volumetric hydraulic drives in repair enterprises and service centers. The results of bench tests using a hydraulic bench and software are presented.
Materials and Methods For the application software development, G graphical programming language of the Laboratory Virtual Instrumentation Engineering Workbench (Lab- View) programming environment developed by the National Instruments Company has been used. The reliability of the results obtained has been confirmed by a series of bench tests of domestic and foreign volumetric hydraulic drives.
Results. There has been developed and implemented new test bench software for the technical inspection of hydraulic drives of different models from domestic and foreign manufacturers in repair plants and service centers. The software is used to capture, process and store data from the sensors during testing, to calculate and output measurement data, to conduct nonlaboratory analysis of the testing process in graphical, textual and video formats, to calibrate sensors, and to store the test results in the electronic library system. The specialized software runs under the Microsoft Windows 7 x86 (32-bit) operating system and is installed on a personal computer of the hydraulic bench data processing unit. The developed software is characterized by the ergonomics of the user interface, the ability to control all the parameters of diagnosing the tested volumetric hydraulic drives.
Discussion and Conclusion. Specialized software and the test bench permit high accurate monitoring of all technical condition parameters of the most common domestic and foreign volumetric hydraulic drives in accordance with the requirements of the manufacturers in the repair enterprises and service centers.
The Digital Twin for Agricultural Machinery Restoration Processes
Authors: Sledkov Yuriy G. , Khoroshko Leonid L. , Kuznetsov Pavel M. , Butko Anton O.
Published: December 2021

Introduction. Agricultural machinery provides the required level of mechanization. Sand abrasive, dirt, and open-air operations considerably accelerate the wear of mechanisms. An improper work plan and lack of complete information about the state of specific equipment units increase the time for repair and maintenance operations. The purpose of the study is to develop a digital twin model for the repair and restoration system of enterprises. The model will reduce material costs and allow for the best solutions to organize the work.
Materials and Methods. The model is developed on the basis of simulation modeling. The authors used the approach based on discrete-event modeling with the logical-mathematical apparatus for describing events occurring in a real object.
Results. Information support is formed taking into account the parameters of the production systems of repair enterprises and a mathematical model, which is a digital twin of the production system. This approach made it possible to automate the development of optimal plans for organizing repair work by repair enterprises, taking into account their interrelationships.
Discussion and Conclusion. The digital twin for the generalized production system of repair organizations allows developing options for the resource allocation and verifying them promptly to choose the best options through accumulating information about the most successful solutions. This will reduce the time for repair and restoration works, improve their quality and save labor.
Integrated Mobile Robotic Platform Model
Authors: Chugunov Mikhail V. , Polunina Irina N. , Divin Alexander G. , Generalova Aleksandra A. , Nikulin Artem A. , Bychkov Dmitriy S.
Published: December 2021

Introduction. The “Smart Agroˮ committee of Research and Education Center “Engineering of the Future” has identified a number of tasks relevant for improving the efficiency of precision, soil-protecting and conservation agriculture. One of these tasks is the development of a digital multi-agent system, which provides a number of services for agricultural enterprises, developers and manufacturers of agricultural machinery. The purpose of the present study is to model an autonomous mobile robotic platform, including the development of software and hardware for trajectory control.
Materials and Methods. To solve the problem, there are used modern CAx systems and their applications, the methods of 3D and full-body modeling, and the method of numerical solution of problems in solid mechanics. To expand and improve the standard functionality of CAx-systems (SolidWorks) in the software implementation of trajectory control algorithms, the methods and technologies of programming using API SolidWorks, VisualStudio C++ (MFC, ATL, COM) are used, and to build physical full-scale models ‒ Arduino and fischertechnik platforms.
Results. The result of the study is a software and hardware module of trajectory control for an integrated (physical and virtual) model of a mobile robotic platform, which can be provided to the consumer as a service for technology autonomation. For the developed integrated model, control algorithms for various types of trajectories were tested.
Discussion and Conclusion. The developed integrated software and hardware model of trajectory control can be used by developers and manufacturers of agricultural machinery, and directly by agro-enterprises for implementing typical technological processes. A feature of the implementation is an open hardware and software interface that provides the integration of mobile robotic platforms based on a digital multi-agent system.
Bibliometrics of Latin American research on COVID-19 in the first year of the pandemic: the main trends
Authors: Chiu Wen-Ta Ta , Ho Yuh-Shan
Published: December 2021

Introduction: An outbreak of the COVID-19 was appended in the central Chinese city of Wuhan in December 2019. Lots of related papers were published in the world since then. Objective: This study aimed to identify and analyze the characteristics of COVID-19 publications in the Science Citation Index Expanded (SCI-EXPANDED) published by Latin Americans in 2020. Methods: Documents including searching keywords in their title, abstract, or author keywords from SCI-EXPANDED were assessed. The analyzed aspects covered characteristics of document types, languages, Web of Science categories, and journals. Publication performances of countries and institutions were evaluated by six publication indicators and two citation indicators. Results: A lower percentage of articles and a higher percentage of Spanish language were found. Web of Science category of general and internal medicine published the most articles. The Clinics was the most popular journal. The Cadernos de Saude Publica and Revista da Associacao Medica Brasileira published the most publications and reviews, respectively. Brazil took a leading position in the six publication indicators. The University of São Paulo in Brazil was the most productive institution. Based on the number of citations from the Web of Science Core Collection since publication to the end of 2020, 10 most frequently cited publications were presented. In addition, the analysis of words in publication titles, author keywords, and KeyWords Plus was performed to find the main research focuses. Conclusions: In 2020, a total of 3 056 COVID-19 documents in SCI-EXPANDED were published by Latin Americans mainly in the Web of Science categories of ‘general and internal medicine’ and ‘public, environmental and occupational health’. More letters and editorial materials and fewer articles were published in the first year of its outbreak. A higher percentage of Spanish and Portuguese publications was found. Brazil dominated the six publication indicators. The University of São Paulo in Brazil ranked top in all the six publication indicators while the Technological University of Pereira in Colombia had a higher impact for their first- and corresponding-author publications. Health and infection were the main research focuses.
Medium chain fatty acids and fatty acid esters as potential markers of alcoholic fermentation of white wines
Authors: Csutoras Cs. , Bakos-Barczi N. , Burkus B.
Published: December 2021

Aroma components of wines play an important role in the sensory quality of wines. In our paper we investigate the effect of commercially available yeast nutrients under different fermentation parameters. Caproic acid, caprylic acid, capric acid, and different fatty acid esters were used as markers of the alcoholic fermentation process. The optimal temperature for the fermentation of different white wines was at 15–16 °C, in the case of examined wines lower concentrations of fatty acids and fatty acid esters were found at this temperature. At 25–26 °C fermentation temperature very high concentrations of fatty acids and fatty acid esters were detected. Applying different nitrogen-containing wine additives we managed to achieve better aroma profiles for white wines even using musts of lower quality.
Development and dolomitization of Anisian isolated carbonate platforms in the Transdanubian Range, Hungary
Authors: Haas János , Budai Tamás , Győri Orsolya , Czuppon György
Published: December 2021

In the Middle Anisian, extensional tectonic movements led to the development of isolated carbonate platforms in the area of the southwestern part of the Transdanubian Range. The platforms are made up of meter-scale peritidal–lagoonal cycles bounded by subaerial exposure surfaces. One of the platform successions (Tagyon Platform) consists predominantly of limestone that contains partially and completely dolomitized intervals, whereas the other one (Kádárta Platform) is completely dolomitized. Drowning of the platforms took place in the latest Pelsonian to the early Illyrian interval when submarine highs came into existence and then condensed pelagic carbonate successions with volcanic tuff interbeds were deposited on the top of the drowned platforms from the late Illyrian up to the late Ladinian. The comparative study of dolomitization of the coeval platforms, affected by different diagenetic histories, is discussed in the current paper. Traces of probably microbially-mediated early dolomitization were preserved in the slightly dolomitized successions of the Tagyon Platform. This might also have been present in the successions of the Kádárta Platform, but was overprinted by geothermal dolomitization along the basinward platform margin and by pervasive reflux dolomitization in the internal parts of the platform. The Carnian evolution of the two submarine highs was different, and this may have significantly influenced the grade of the shallow to deeper burial dolomitization.
REGIONAL CLIMATE CHANGES IN NORTH-EASTERN POLAND AND THEIR IMPACT ON MAIZE CROPS
Authors:   Wroclaw University of Environmental and Life Sciences, Kuchar Leszek , Szwejkowski Zbigniew ,   University of Warmia and Mazury in Olsztyn, Rychcik Bogumił ,   University of Warmia and Mazury in Olsztyn, Dragańska Ewa ,   University of Warmia and Mazury in Olsztyn, Cymes Iwona ,   University of Warmia and Mazury in Olsztyn
Published: December 2021

Aim of the study. Indication of changes in maize yield for grain and silage in connection with the observed climate changes. Material and methods.Data from field experiments of the experimental station of the University of Warmia and Mazury since 1972 as well as meteorological data (air temperatures and precipitation). Calculations using the trend analysis of original variables and determined indexes (GDD, SPI, Sielianinov index), weather-yield linear models and elements of spectral analysis. Results and conclusions. Changes in thermal conditions were demonstrated based on average air temperatures and the GDD index. There were no significant changes in atmospheric precipitation, showing a small periodicity of ten years, and no changes in monthly frequency with a deficit of precipitation (SPI analysis). It was demonstrated that changes in thermal conditions as well as the introduction of new maize varieties over fifty years significantly improved plant maturation, which resulted in a significant increase in grain weight. However, this did not affect the yield of maize for silage, neither in crop rotation nor in the monoculture system.
PHYTOTOXIC ACTIVITY OF BIOACTIVE COMPOUNDS FROM FOUR PLANTS AGAINST SELECTED WEEDS IN AGRICULTURE
Authors:   The Islamia University of Bahawalpur, Anwar Tauseef , Qureshi Huma ,   Gomal University
Published: December 2021

Aim of the Study. Heavy doses of synthetic weed control chemicals have caused herbicide resistance in weeds. Natural com pounds produced by living organisms constitute a wide field for ecologically safe herbicides. The experiments were designed to test allelopathic potential of hexane extracts of selected plants against common weeds in agriculture viz. Euphorbia helioscopia, Rumex dentatus, Phalaris minor, Avena fatua and Chenopodium album. Materials and methods. Allelopathic potential of Carica papaya, Rhazya stricta, Lantana camara and Pinus roxburghii hexane extracts against weeds was determined at 100%, 75% and 50% concentration on soil, filter paper and agar. Parameters adopted for assessing allelopathic potential were the germination (%) and the length of seedling (cm). Data analysis was performed using the Statistica 9 software. Results and Conclusion. The results indicated that R. stricta, C. papaya, L. camara and P. roxburghii hexane extracts possesses suppression effects against weeds among which L. camara had the most conspicuous inhibition effects on selected weeds. The inhibitory effects of germination and seedling growth were in order R. stricta > L. camara > C. papaya > P. roxburghii. Field analysis to assess the phytotoxic ability of these species to be used as herbicide is recommended.