bluuebunny/crossref_metadata_2025 huggingface dataset:
Aristotle’s Mixture in its Medical and Philosophical Background: The Hippocratic De victu and the Aristotelian De generatione et corruptione
Authors: Mirrone Claudia
Published: December 2021

Aristotle’s notion of qualitative interaction ruling both the process of mixture and the process of reciprocal elemental transmutation is based upon the idea of a physical contrariety endowed with two extremes and a wide central area where the opposite forces reach different equilibrium points (i.e., the so-called mixtures) or can be present to the fullest degree (in this case we do not have a mixture, but an element). Differently from previous scholarship which attributes this notion specifically to Aristotle, we have found, in a text which Aristotle seems to have been acquainted with, the Hippocratic De victu, an incipient structure of a contrariety endowed with extremes and a central area where opposite forces meet and yield respective equilibrium points, mixtures, which, as in Aristotle, give an account of the variety of beings existing in the world. In this article, we suggest the possibility that in the development of the Aristotelian thinking about elemental and qualitative dynamics, the Hippocratic De victu may have contributed to suggesting to Aristotle a way of envisioning the structure of his basic physical contrarieties.
Bycie – nie bycie, prawda – fałsz w koncepcji Arystotelesa
Authors: Wesoły Marian Andrzej
Published: December 2021

The basis of Aristotle’s arguments about truth and falsity is formulated syntactically according to the distinctions of ‘to be’ as the predicative affirmation - composition and, correspondingly, ‘not to be’ as negation – separation. As the nominal defining characteristic of falsity is contradic­tion, so of truth is non-contradiction. The expression of truth or falsity in the declarative sentence of affirmation or negation is a function of thinking as a human cognitive disposition under the semantic figures of categorical predication. In addition, we cite Aristotle’s more important texts on the true intellection of non-composites (indivisibles), the inves­tigation of truth and probability, the diagnosis of falsehood, the truthful­ness and lying. Finally, a mention of modern adaptations of Aristotle’s concept of truth.
Filozofia Chrześcijańska a obraz świata. Uwagi z perspektywy socjologii filozofii
Authors: DUCHLIŃSKI PIOTR
Published: December 2021

W artykule przedstawiam propozycję badania filozofii chrześcijańskiej rozumianej jako tradycja badawcza z perspektywy socjologii filozofii. Dla socjologa filozofii, filozofia chrześcijańska to określone zjawisko empiryczne, które możemy poznać odkrywając mechanizmy jego funkcjonowania. W artykule koncentruję się na zagadnieniu akceptacji obrazu świata, który określa tożsamość filozofii chrześcijańskiej. Zadaniem socjologii filozofii jest odkrycie mechanizmów, które wpływają na kontekst akceptacji tego obrazu świata. Socjologia filozofii dystansuje się od oceny prawdziwości czy fałszywości treściowej tez głoszonych przez poszczególnych filozofów. Choć każda filozofia rozwija się według zasad tzw. immanentnej logiki, to jednak określone czynniki społeczne i psychologiczne mają wpływ na to, co dany filozof akceptuje jako oczywiste i nie podlegające żadnej dyskusji. W artykule wykazałem, że akceptacja obrazu świata jest konsekwencją wychowania, które dokonuje się w określonej grupie społecznej (np. rodzina, szkoła) wyznającej określone idee aksjologiczne i przekonania deskryptywne. Dzięki wychowaniu w przyszłym adepcie filozofii, który zawsze pozostaje dzieckiem swojego czasu i kultury, zostaje przygotowany umysłowy i emocjonalny grunt pod akceptację już bardziej spekulatywnego obrazu świata, z którym adept zapoznaje się podczas fachowych studiów uniwersyteckich (filozoficznych lub teologicznych) pod okiem uznawanych przez niego autorytetów. Ukształtowany za pomocą określonych procesów wychowawczych umysł, jest w stanie dokonać osobistego, i całościowo angażującego aktu wiary epistemicznej w określony obraz świata, który jest mu podawany poprzez teorie i praktykę edukacyjna. Akceptacja i zaangażowanie w obraz świata umożliwia formułowanie w jego ramach określonych strategii argumentacyjnych, których zadaniem jest (i) eksplikacja, (ii) objaśnienie i (iii) uzasadnienie przedmiotowych konsekwencji obrazu świata. Praktyki argumentacyjne przejmujemy poprzez trening, uczymy się ich w mowie i piśmie, oczywiście pod okiem tych, którzy sami wcześniej te argumenty praktycznie wypróbowali. Uczeń po prostu wierzy nauczycielom i podręcznikom. Do pewnego etapu wiara ta jest racjonalna. Obraz świata jako pewna całość, na którą składają się treściowe przekonania deskryptywne i normatywne nie podlega żadnemu ostatecznemu racjonalnemu uzasadnieniu. Zaakceptowanym tezom przedmiotowym przypisuje się różny status epistemologiczny; od tez obdarzonych bezwarunkową oczywistością, których korelatem jest nie tylko subiektywne przeżycie, ale obiektywna rzeczywistość, do takich, które mogą być poddane mniej lub bardziej twórczej rewizji za pomocą różnych rodzajów zabiegów interpretacyjnych. Żaden obraz świata nie zniewala w sposób ostateczny. Zawsze możliwa jest zmiana obrazu świata na inny, który bardziej odpowiada naszych potrzebom intelektualnym i wrażliwości emocjonalnej. Zmiana ta przybiera w niektórych sytuacjach formę szczególnej konwersji
Nauczanie podsystemu leksykalnego w edukacji przedszkolnej dzieci ze spektrum autyzmu oraz zespołem Aspergera
Authors: Szymańska Monika
Published: December 2021

Nie tylko specjalne potrzeby edukacyjne, lecz także cechy rozwojowe silnie determinują specyfikę nauczania podsystemu leksykalnego jezyka obcego w edukacji przedszkolnej. Celem tego artykułu jest prezentacja wyników badania, przeprowadzonego pośród grupy dzieci pięcioletnich, dotkniętych spektrum autyzmu oraz zespołem Aspergera. Dążeniem tego konkretnego kontekstu pedagogicznego edukacji przedszkolnej jest przeanalizowanie trudności i ich możliwych modyfikacji w metodyczne możlwości. Po pierwsze, wykorzystując perspektywnę neurobiologiczną zaprezentowana zostanie specyfika nauczania podsystemu leksykalnego wśród dzieci. Następnie omówione zostaną szczególne potrzeby i umiejętności dzieci ze spektrum autyzmu oraz zespołem Aspergera. Praktyczna część artykułu powstała na bazie badania, przeprowadzonego w roku szkolnym 2018/2019 w Warszawie. Eksperyment pozwolił na zdiagnozowanie czy zastosowanie teorii inteligencji wielorakich, zadań multisensorycznych oraz zabawy dydaktycznej w kontekście przedszkolnej edukacji specjalnej wpływa na proces nauczania-uczenia się języka obcego.
Nauczanie gramatyki języka obcego a podejście zadaniowe
Authors: Pawlak Mirosław
Published: December 2021

While there is a consensus that teaching grammar is now indispensable in most educational contexts, there still exist numerous controversies as to how this should most beneficially be done. They concern, among others, such issues as the choice of instructional options to be used in order to introduce and practice grammar structures or to provide corrective feedback on errors made in the use of such structures (cf. Loewen, 2020; Nassaji, 2017; Pawlak, 2014, 2020a). On a more general level, a question arises as to the optimal way of organizing the material to be taught, with consequences for the overall approach to grammar instruction. One influential alternative to a structural syllabus, in which case grammar structures are carefully preselected and sequenced, is task-based language teaching, which can be conceptualized and implemented in various ways (cf. Ellis, 2017, 2018). The paper discusses the role of grammar in the task-based approach, also taking into account techniques and procedures that can be employed for this purpose. An overview of existing empirical evidence will be presented and an attempt will be made to highlight the way in which communicative tasks can be used to assist grammar teaching in the Polish educational context.
Livio Rossetti nella terra incognita degli Eleati
Authors: Ioli Roberta
Published: December 2021

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Monism in Aristotle’s Metaphysics I.3–5
Authors: Johansen Thomas Kjeller
Published: December 2021

Scholars have often seen Parmenides as entirely opposed to earlier materialistic philosophy. In this paper I argue that what is more striking in Aristotle’s Metaphysics Book I is the degree of continuity that he sees between Parmenides and the material monists. I explore this coupling of Parmenides with the material monists to understand better what he takes to be distinctive and problematic with Parmenides’ monism.
Aristotle, Eleaticism, and Zeno’s Grains of Millet
Authors: Boeri Marcello D.
Published: December 2021

This paper explores how Aristotle rejects some Eleatic tenets in general and some of Zeno’s views in particular that apparently threaten the Aristotelian “science of nature.” According to Zeno, it is impossible for a thing to traverse what is infinite or to come in contact with infinite things in a finite time. Aristotle takes the Zenonian view to be wrong by resorting to his distinction between potentiality and actuality and to his theory of mathematical proportions as applied to the motive power and the moved object (Ph. VII.5). He states that some minimal parts of certain magnitudes (i.e., continuous quantities) are perceived, but only in potentiality, not in actuality. This being so, Zeno’s view that a single grain of millet makes no sound on falling, but a thousand grains make a sound must be rejected. If Zeno’s paradoxes were true, there would be no motion, but if there is no motion, there is no nature, and hence, there cannot be a science of nature. What Aristotle noted in the millet seed paradox, I hold, is that it apparently casts doubt on his theory of mathematical proportions, i.e., the theory of proportions that holds between the moving power and the object moved, and the extent of the change and the time taken. This approach explains why Aristotle establishes an analogy between the millet seed paradox, on the one hand, and the argument of the stone being worn away by the drop of water (Ph. 253b15–16) and the hauled ship, on the other.
Człowiek dzieckiem Bożej Wolności. Wybrane aspekty antropologii teologicznej Pawła Evdokimova
Authors: Kiejkowski Paweł
Published: December 2021

Paweł Evdokimov (1901-1970) to jeden z najważniejszych współczesnych teologów prawosławnych. W jego pracach znajdujemy bardzo ważne, inspirujące i prorocze intuicje antropologiczne. Jego antropologia zbudowana jest wokół pojęć: „imago Dei”, ciało-dusza-duch, biblijne serce, osoba, teandryzm, miłość oraz wolność. Człowiek jako osoba ludzka realizuje się poprzez w wolności rozpoznany i przyjęty dar ikoniczności. Doskonałym Obrazem jest wcielony Syn. Wierzący w Jezusa Chrystusa realnie uczestniczy w Jego synostwie oraz wolności, która urzeczywistnia się przez miłość.
Markers of Ecological Conversion
Authors: Piasecki Piotr
Published: December 2021

Conversion is a transformation altering worldviews and identities through changed awareness of self, community (including religion, society, politics, economics and industry) and global ecology. The guiding principle of Laudato si’ by Pope Francis is contained in several points, “Everything is related”, relies on scientifical findings: life on Earth’s current forms depend on natural equilibriums. Biodiversity collapse and global warming are two deteriorations which deeply threaten the humanity survival. Christian tradition offers some precious assets to face this emergency, and become committed, as a Christian, in ecological causes: Ecological conversion is essentially a return to the realization of God’s will in the matter of caring for one’s home.
Poglądy Kasjodora na temat sprawowania urzędów państwowych na podstawie XI i XII księgi Variae
Authors: Kieling Michał
Published: December 2021

W powyższym artykule podjęto tematykę zasad sprawowania urzędów państwowych na podstawie ważnego dla historiografii i kultury europejskiej dzieła Variae autorstwa Kasjodora. Pismo to składa się z dwunastu ksiąg i zawiera dokumenty urzędowe oraz pisma królewskie z lat 489-538. W oparciu o analizę tekstu źródłowego, szczególnie XI i XII księgi wyżej wspomnianego dzieła, przeanalizowano dokumenty, które Kasjodor napisał w czasie pełnienia przez niego jednego z najważniejszych urzędów w królestwie Ostrogotów – prefekta pretorium. W opracowaniu, które składa się z czterech części, wskazano na najważniejsze zasady piastowania urzędów. W pierwszym punkcie przedstawiono osobę i działalność samego Kasjodora jako prefekta pretorium, wskazując na jego wysokie kwalifikacje, prawość oraz odpowiedzialność za państwo. W drugim punkcie ukazano dwie ważne zasady, którymi powinni charakteryzować się urzędnicy: posłuszeństwo i lojalność wobec władzy oraz zachowywanie prawa. W kolejnym punkcie zaprezentowano tematykę awansów i gratyfikacji urzędników, które wynikały z pełnienia służby publicznej. Ostatni punkt został poświęcony walce z korupcją i nadużyciami, w szczególności z przekupstwem, kradzieżami, łapówkarstwem i łamaniem prawa. Tematyka powyższego opracowania jest wciąż aktualna. Zasady sprawowania urzędów, o których pisze Kasjodor, nadal stanowią wysokie standardy osoby piastującej urzędy państwowe różnych szczebli.
Posługa słowa księdza Wawrzyńca Kuśniaka COr (1788-1866)
Authors: Kalbarczyk Adam
Published: December 2021

Prowadzony obecnie proces beatyfikacyjny sługi Bożego ks. Wawrzyńca Kuśniaka COr (1788 -1866) stał się okazją do przypomnienia i zbadania jego spuścizny kaznodziejskiej w postaci osiemnastu zachowanych jego kazań na różne okazje. W niniejszym artykule zostały one poddane analizie homiletycznej. Większość z nich zbudowana jest według powszechnie stosowanego w tamtych czasach schematu tzw. kazania właściwego. Ksiądz Kuśniak chętnie posługuje się dowodem biblijnym i patrystycznym, wykazując się znakomitą znajomością zarówno Pisma Świętego, jak i pism Ojców Kościoła. Widać przy tym wyraźnie, że zdaje sobie sprawę z wagi i siły słowa Bożego, i w przeciwieństwie do wielu kaznodziejów jego epoki nie ogranicza jego roli w kazaniu tylko do ilustracji czy argumentu. Równie poważnie traktuje kościelne nauczanie. Nie przedstawia wiary jako sumy dogmatów i nakazów moralnych, lecz stara się ukazać ekonomię Bożą ukierunkowaną na autentyczną przemianę i zbawienie człowieka. Jego kazania zawierają wiele konkretnych odniesień do życia słuchaczy, co sprawia, że są one życiowe. Ten wymiar ukazuje go jako zaangażowanego duszpasterza. Przesłanie jego kazań wydaje się nadal aktualne, a jego postawa kaznodziejska i duszpasterska mogą stanowić wzór do naśladowania dla dzisiejszych głosicieli słowa Bożego. Przepowiadanie ks. Kuśniaka daje też pewien obraz polskiegokaznodziejstwa w Wielkopolsce w pierwszej połowie XIX wieku.
Między „szokiem lockdownu” a (post)pandemicznym priorytetem, czyli o rozwijaniu rezyliencji u uczniów w toku edukacji religijnej
Authors: Chrostowski Mariusz
Published: December 2021

Lockdown, związany z rozprzestrzenianiem się wirusa SARS-CoV-2, stawia szkołę, a z nią także teologów i pedagogów religii przed nowym (post)pandemicznym priorytetem, którym jest nie tylko ogólnie rozumiany rozwój rezyliencji u uczniów, w obliczu zagrożenia życia i zdrowia, ale także wzmocnienie jej „religijnego” wymiaru. Ważną rolę może odegrać w tym względzie edukacja religijna, której siła tkwi w zdolności oferowania ludziom bogatego spektrum sposobów radzenia sobie w rozmaitych sytuacjach życiowych czy też przeciwnościach losu. Niniejszy artykuł prezentuje najpierw zarys problemu zmienionej sytuacji egzystencjalnej i edukacyjnej uczniów w czasach pandemii wirusa SARS-CoV-2 w Polsce, co w efekcie umożliwia określenie socjalno -edukacyjnych skutków lockdownu będących wyzwaniem dla edukacji religijnej (w obrębie działań edukacyjno -wychowawczych) na rzecz rozwoju rezyliencji. Rozważania te stanowiąniejako punkt wyjścia do przedstawiania zagadnienia konstruktów religijnych, modlitwy i teologizowania jako edukacyjnych nośników prężności psychicznej, które mogą skutecznie pomóc dzieciom i młodzieży w poszerzaniu osobistych zasobów tej cennej – w sensie indywidualnym i społecznym – umiejętności.
Germination of coastalplain honeycombhead (Balduina angustifolia) in response to photoperiod, temperature and gibberellic acid
Authors: Campbell-Martínez Gabriel , Thetford Mack , Wilson Sandra B. , Steppe Carlee , Pérez Héctor E. , Miller Debbie E
Published: December 2021

Coastalplain honeycombhead (Balduina angustifolia) is underutilised in ecosystem restoration and pollinator conservation projects. Seeds collected from different populations throughout Florida, USA during 2007 and 2016-2018 were used in experiments that evaluated the effects
of a 0 or 12-hour photoperiod, seasonal and standard temperatures, 0-5,000 ppm gibberellic acid (GA) or source population (northwest, central and south Florida) on seed germination. For central Florida seeds, germination was high (62-74%) in all seasonal temperatures except for summer (4%)
and was not affected by photoperiod. Germination differed for two northwest populations and was higher in warm (35/25 and 30/20°C) temperatures compared with cool (25/15 and 20/10°C) temperatures (63-72% vs. 9-36%). In a one-year move-along experiment, germination was similar at all
seasonal and constant temperatures for seeds from central, south-central and south Florida, while northwest Florida seeds had reduced germination under winter temperatures. Germination of northwest Florida seeds after exposure to GA increased for two of four and three of four populations for
one year and five-day old seeds, respectively. There were different temperature requirements on a regional scale and different dormancy levels at a local scale for coastalplain honeycombhead.
Hyperglycaemia in COVID-19: improving recognition and management in a single centre
Authors: Wardrope Jordan , McKenzie Iona Elizabeth , Barwell Nicholas
Published: December 2021

Background: Hyperglycaemia is a recognised complication of COVID-19 disease and is associated with increased morbidity and mortality. Effects are noted in individuals with and without diabetes and potentiated by the use of recognised COVID-19 treatments such as corticosteroids. Early glycaemic control in the inpatient with COVID-19 disease impacts significantly on outcomes.
Methods: A three-phase improvement project evaluated the recognition and management of hyperglycaemia in 120 adult inpatients with COVID-19 disease over a 4-month period. A local guideline and a separate acute care ‘bundle’ were implemented to improve performance. The main outcomes of the project were evaluated in a repeated cross- sectional design; assessing the performance of regular capillary blood glucose monitoring and appropriate treatment of hyperglycaemia where indicated.
Results: Prior to intervention, 78.6% of patients had appropriate capillary blood glucose monitoring and no patients were deemed to receive appropriate treatment. Following interventions, 83–100% of patients had appropriate monitoring and 75–100% received appropriate treatment.
Conclusions: In this setting, implementation of a guideline and a care bundle contributed towards improved recognition and management of hyperglycaemia in patients with COVID-19 disease. Future study could assess the impact of interventions on a larger scale whilst investigating variation in the subtype of diabetes, patient sex and other demographics on outcomes such as length of stay, morbidity and mortality.
Decolonizing the learning of sitopias in Toronto
Authors: Kavcic Chloe , Moraes Andrea , Rahouma Lina
Published: December 2021

The Canadian Cuisine Photography Challenge is a pilot experiential learning activity created at Ryerson University for the class FNU100-Canadian Cuisine: Historical Roots, a first/second year liberal studies course offered to students from diverse programs and cultural backgrounds. This activity is both a fun challenge and a required course assignment. It aims to engage students with Canadian cuisine and is inspired by a decolonial pedagogical approach (Mignolo & Walsh, 2018; Santos, 2018) to food studies, and elements of photovoice methodology (Wang & Burris, 1997). The Canadian Cuisine Photography Challenge consists of a field trip to different food places or sitopias in Toronto with the goal of learning about their histories and developing an appreciation of the role of food and people in the city  (Newman, 2017). The activity includes a map, instructions and a set of ten challenge questions that students answer through photographs taken during their field trip. The field trip is followed by students’ presentations in class and a reflection of their experiences. In the first phase of the project, students explored two sitopias: Kensington Market and Chinatown.

This paper will first describe the co-creation of the Canadian Cuisine Photography Challenge with students from the School of Nutrition at Ryerson University. This was a collaboration between the course instructor, two School of Nutrition students and included input from other students who had previously taken the course. It will present key learnings from the feedback of students who participated in the challenge in the fall of 2019, including how they described their experience, what they learned and suggestions for the future developments of this project. In particular this field reportwill discuss the use of a decolonial pedagogy in food studies, recognizing and challenging a Western hegemonic view of food places as representative of Canadian cuisine, while at the same time outlining the co-construction of experiential learning activities to engage students and provide content that reflects the multiple identities and food cultures of Canadians in Toronto. The main purpose of this field report is to share our experience co-creating and implementing this pilot project as one contribution towards decolonial food pedagogies.
From a study of the Newfoundland and Labrador school food system:
Authors: Doyle Emily
Published: December 2021

In this perspective piece I reflect on the importance of considering the place of schools within broader systems for critical school food study and intervention. These reflections are based on my study of school food in Newfoundland and Labrador from a systems perspective which helped reveal to me how assumptions about school food tend to get in the way of deep understanding about the impact and sustainability of programs.
Marianist Educational Associates: Advancing and Promoting the.Mission of Catholic
and Marianist Universities
Authors:   University of
            Dayton, Brion Corinne , Leigh Allison ,   University of
            Dayton
Published: December 2021

Preparing employees to become stewards of Marianist values has become a priority
at Marianist institutions because employees impact the institutions’ environment, and
faculty and staff directly impact student learning. To date, there is a lack of research
conducted among employees of Marianist institutions on how new understandings of the
institutional mission get transferred to their jobs. Additionally, there is a lack of
empirical studies that examine what enhances and hinders the transfer of such
understanding. Using the Multidimensional Model of Learning Transfer as a theoretical
framework, the purpose of this qualitative study is to explore the extent to which
employees attending a formation are able to transfer the newly acquired knowledge to
their professional lives and to understand what inhibited and supported their transfer
of knowledge. Findings reveal that participants did transfer some knowledge to their
positions. Based on these findings, the research team offers recommendations to increase
the transfer of new religious understanding.
Preparing New Catholic School Educators for Inclusive Schools: An Analysis of
University and Diocesan Teacher Training Research
Authors:   University of San
            Diego, Jez Rebekka J. , Ramers Lauren ,   University of San
            Diego, Burgess Melissa M. ,   University of San
            Diego, Cantillon Julie C.
Published: December 2021

Educators can improve the academic and socioemotional wellbeing of their students
if they are equipped with strategies and skills to support learners and families from
diverse backgrounds and experiences—such as culturally and linguistically diverse
students, students with differing abilities, and those who may experience trauma and/or
socioeconomic challenges. To learn more about this topic, a Catholic university and
local diocese partnered to examine the literature on the impact of Catholic teachers in
under-resourced schools; practices for training Catholic educators with skills to meet
the needs of all learners; and the structures needed to ensure that diocesan and
university supervisors are able to effectively support the development of new teachers.
The literature review was organized using the three pillars of the University Consortium
of Catholic Education: service through teaching, community connections, and spiritual
development. The review resulted in the following recommendations: train teachers in
culturally responsive practices, incentivize educator collaboration, train supervisors
in inclusive practices with purposeful faith-based integration, and mentor principals in
effective methods of coaching and support for teachers
Mission, Faith, and Values—A Study of 94 Voices from Rhode Island Catholic
Secondary School Graduates
Authors:   Rocky Mountain College of Art +
            Design, Keefe Thomas E.
Published: December 2021

While the mission statements of Catholic schools place emphasis on faith
formation, Catholic schools are more often identified with high-quality academics and
less with the development of faith. A qualitative descriptive study was designed to
understand how Rhode Island Catholic secondary school graduates described the influence
of the Catholic educational mission on the formation of faith and personal life values.
The results of the study indicate that the graduates of Catholic secondary schools in
Rhode Island recognized the strength of the academic programs at the four identified
Catholic secondary schools. Participants also profusely described the influence of the
Catholic educational mission on the development of personal life values, but the results
were less conclusive regarding graduates’ perceptions of the faith formation experience.
Graduates who described faith as a process and personal journey had a more positive
attitude regarding the influence of the Catholic educational mission on faith formation.
In contrast, those who described faith as the practice of religious ritual as well as
obedience to the dogma of the Catholic Church, both positively and negatively, were less
effusive regarding the Catholic educational mission.
MultiPharm-DT: A Multi-Objective Decision Tool for Ligand-Based Virtual Screening Problems
Authors: Puertas-Martín S. , Redondo J.L. , Ferrández M.R. , Pérez-Sánchez H. , Ortigosa P.M.
Published: December 2021

Ligand Based Virtual Screening methods are used to screen molecule databases to select the most promising compounds for a query. This is performed by decision-makers based on the information of the descriptors, which are usually processed individually. This methodology leads to a lack of information and hard post-processing dependent on the expert’s knowledge that can end up in the discarding of promising compounds. Consequently, in this work, we propose a new multi-objective methodology called MultiPharm-DT where several descriptors are considered simultaneously and whose results are offered to the decision-maker without effort on their part and without relying on their expertise.
Materials science for fuel cells
Authors:   Frantsevich Institute for Problems of Materials Science of the NAS of Ukraine, Vasylyev O. D.
Published: December 2021

The words on fuel cells, especially joined with hydrogen, take more and more rooms in discussions on security, energy and ecology. The paper addresses questions concerning the structural optimization of electrolytes and electrodes applying both zirconia and proton exchange membrane. The final, optimized, chemical composition and structure of entire fuel cells would be tuned by considering the structural altering occurring during both production and long-term operation. The paper evidences undeniably that the structure of fuel cells, ceramic and polymeric ones, direct and reversible, require a deep detailed comparative study in states after both production and different time of operation. Respectively, a structural optimization of fuel cells to be related to all the complex of their properties that finally has to result in an improvement both properties themselves and their stabilization for a long term of usage is required. It is clear that up-to-date fuel cells cannot be considered more as some just chemical devices producing electricity. They have to be sointricately designed that each their atom is attached to each of its neighbors in such an optimal way in order to ensure the properties of whole the fuel cell as adevice, which produces useful energy in the best possible manner during rather long period of time. It means that from materials science point of view the structure of fuel cell must be optimized to meet a wide spectrum of requirements to cell as high temperature electrochemical device of a long-term of operation. Now, materials science concerning fuel cells is a study not only such the obvious topics as ionic or electronic conductivities, structure of dense electrolyte and both three phase porous electrodes, mechanical behavior of entire fuel cell device etc. The study of an influence of loading and gases delivery to their interaction sites on properties of entire energy system is obvious also. In general, the fuel cell technologies are rather mature already and they might be put into commercial production. Nevertheless, the opportunities for development are endless. 3D printing is imminent. Keywords: fuel cell; ceramic fuel cell; fuel cell based on proton exchange membrane; fuel cell electrolyte; fuel cell electrode; structural optimization; materials science for fuel cells.
Extended characterization of materials based on continuous instrumented indentation diagrams
Authors:   Frantsevich Institute for Problems of Materials Science of the NAS of Ukraine, Galanov B. A. , Ivanov S. M. ,   Frantsevich Institute for Problems of Materials Science of the NAS of Ukraine, Kartuzov V. V. ,   Frantsevich Institute for Problems of Materials Science of the NAS of Ukraine
Published: December 2021

In addition to the traditional determination of hardness and elastic moduli from continuous diagrams of instrumental indentation, it is proposed to determine the yield stress, the characteristic of plasticity, the characteristic relative size of the elastoplastic zone under the indenter, and the volumetric deformation of the material in the area of contact of the indenter with the sample. The indentation diagram shows the transition point to the unconstrained material flow under the indenter. Keywords: indentation, hardness, elastic moduli, contact stiffness, elastic-plastic strains.
The estimation of energy and elastic properties of TiAlNb materials based on results of first principles calculations
Authors:   Frantsevich Institute for Problems of Materials Science of the NAS of Ukraine, Ovsiannikova L. , Rozhenko N. ,   Frantsevich Institute for Problems of Materials Science of the NAS of Ukraine
Published: December 2021

The results of research of isolated TiAlNb clusters are presented. The models of isolated clusters of 27, 59, 65 atoms in size which is fragments of the bcc structure have been constructed. The models stoichiometry imitate α-, γ-, α+γ- and β-phase TiAlNb alloys. The structural, cohesive and electronic properties of these clusters have been investigated within the framework of electronic density functional theory with PBE0 functional with a set of MINI basis functions with application of Gaussian'03 and GAMESS software packages. It was found that upon transition of the cluster structure from the α- to the β-phase, the cohesion energy increases and the crystal lattice period decreases. This corresponds to an increase in the values of the structure strength and density. For the calculation of the bulk modulus were utilized value of changes in energy and volume of cluster, got in research. The bulk modulus of the isolated β-phase TiAlNb cluster is predicted. This bulk modulus near to 142.4 GPa. The result was extended to volumetric structures. The investigation showed that bulk modulus of Ti2AlNb materials near to 163.6 GPa. Comparison of calculation results with experimental values of elastic moduli of materials with similar structure and composition is carried out. The comparison revealed the agreement between the calculated values and the results of experiments. A method is proposed for evaluating the elastic properties of TiAlNb alloys based on the results of first principles calculations. Keywords: cluster, aluminide titanium, bulk modulus, computer material science.
Thermodynamic properties of alloys binary In—Pr (Nd) and ternary In—Pr (Nd)—Ni systems
Authors:   Frantsevich Institute for Problems of Materials Science of the NAS of Ukraine, Dudnik A. S. , Kudin V. G. ,   Taras Shevchenko National University of Kyiv, Romanova L. O. ,   Frantsevich Institute for Problems of Materials Science of the NAS of Ukraine, Sudavtsova V. S. ,   Frantsevich Institute for Problems of Materials Science of the NAS of Ukraine
Published: December 2021

The thermochemical properties of In—Pr system melts in the range of compositions 0 < xIn < 0,4 and In—Nd in the whole concentration range at 1573 ± 1 K were investigated by isoperibolic calorimetry. The obtained data for the In—Pr system melts were extrapolated to the unexplored concentration interval, taking into account that at xPr = 1 the integral and partial mixing for Pr enthalpy are equal to zero. It was found that the first partial for Pr and the minimum enthalpy of mixing are equal to –139 ± 11 and –40,3 ± 0,2 kJ / mol, respectively. For the In—Nd system the first partial for In and Nd, the minimum enthalpy of mixing is equal to −131,7 ± 11, −140,6 ± 12 і –43,3  0,2 kJ / mol, respectively. Comparison of ΔHmin, melts of the five previously studied In—Ln systems from the ordinal number Ln (zLn) together with the data obtained in this work showed that they are described by a single trend line. For ΔHmin of melts of In—Eu (Yb) systems there are very insignificant deviations from the trend line. But for the size factor, these deviations from the trend line are more significant. The enthalpies of formation of some intermetallics of In—Ln systems are known, and most of them belong to the compound LnIn3. But there is no complete agreement between these data. The results of the most modern work show less dependence on the serial number of lanthanide and are more exothermic for heavy lanthanides, compared with other data. Keywords: thermochemical properties, compounds, melts, In, Pr, Nd.
Features of Machining Rotor Shafts of Diesel Engine Turbochargers with a Multilayer-Coated Tool
Authors: Skryabin Vladimir A.
Published: December 2021

Introduction. The paper presents the results of experimental studies of power parameters when hard alloy steels are machined with tools, the cutting units of which have multilayer hard, heat-resistant and wear-resistant coatings. The obtained data will make it possible to optimize machining hard-to-machine materials.
Materials and Methods. The aim of the study is to measure the power parameters of turning products and to create experimental formulas of power parameters for different technological modes. For this purpose, a special measuring multicomponent complex was used to estimate the influence of the mode parameters on the change in the cutting force components.
Results. The numerically controlled machine tool was retooled by combining it with a three-component dynamometer and tooling. The cutting unit of the tool was coated with a multi-layer hard, heat-resistant and wear-resistant coating. The tool was equipped with instruments connected to a personal computer for measuring and processing experimental data. According to the results of the study, there have been obtained graphical dependences and empirical formulas, which take into account the influence of the mode parameters on the cutting force components when machining the units of alloy steels of high hardness, heat resistance and wear resistance.
Discussion and Conclusion.The study allowed us to obtain experimental formulas of cutting force components for different mode parameters when machining parts by the tool equipped with cutting plates. The plates are coated with multilayer hard and wear-resistant coatings of titanium carbonitride, aluminum oxide and nickel nitride. The coating increases significantly the hardness, heat and wears resistance of the tool cutting unit and provides quality machining.
Increasing the Flow Capacity of Hoses with Electrical-Heater Coils to Supply Thickened Preservatives for Spraying
Authors: Petrashev Aleksandr I. , Knyazeva Larisa G.
Published: December 2021

Introduction. Anticorrosion protection of agricultural machinery working elements is provided through using pneumatic application of thickened preservatives with heating. For this purpose, a wire coil is inserted inside the preservative-supply hose and connected to a current source. It is known that the wire thickness and the coil pitch affect the hydraulic resistance to fluid flow. However, it has not been established how the diameter of the coil insert and its heating affect the flow capacity of the flexible hose channel. The purpose of the research is to increase the capacity of a flexible hose with an electrical-heater coil. For this purpose, it is necessary to determine its geometric parameters minimizing the hydraulic resistance to the thickened preservative flow and reducing the energy consumption for heating the material in the hose.
Materials and Methods. It is proposed to investigate two electrical-heater coils of the same length, but of different diameter, made of steel welding wire pieces of equal length. There was developed a stand to study the influence of the inserted coil parameters on the hose hydraulic resistance. The stand was used to determine pressure losses in hoses with coils and in smooth hoses when used engine oil and thickened preservative flow through them. The flow capacity of the hose with cold and heated coils was estimated.
Results. The method of heating the preservative in the hose wall layer is justified. At the same time, its flow capacity increases one and a half times with less energy consumption (2.4 times) than when heating the preservative in the central part of the hose. Under laminar flow mode, the pressure loss in the hose is 2 times lower when the coil is equal to 0.85 of the hose channel diameter than when the coil is equal to 0.67 of the channel diameter.
Discussion and Conclusion. The research found the rational way of placing the electrical coil near the heated hose channel wall. At low air temperature, the reduction of the thickened preservative viscosity by heating in the hose helps to decrease the pressure loss up to 50% and increase its flow capacity by 1.4‒2.0 times. The use of a electrical-heater coil in the hose with thickened preservative will minimize energy consumption when preserving equipment on open storage sites.
Experimental Data of Grinding Dried Fibrous Plant Materials
Authors: Braginets Sergey V. , Bakhchevnikov Oleg N. , Alferov Aleksandr S.
Published: December 2021

Introduction. Developing a method for energy-efficient grinding of fibrous vegetable raw materials to avoid the clogging of grids remains an urgent task. The aim of the research is to study the process of grinding dried fibrous plant materials and to estimate the influence of the device operating characteristics on the quality of grinding and the process energy intensity.
Materials and Methods. The experimental apparatus is a rotor grinder. Its working bodies are alternate knives and hammers. When a hammer is in motion, its triangle side creates the reduced pressure area. There was studied the influence of the linear velocities of knife motion and of feed of raw materials on fractional composition of the grinded materials, grinder productivity, and grinding specific energy capacity.
Results. It is found that the change in the fractional composition of the grinded product occurs when the speed of the rotor knives increases. Optimal range of knife speed for producing the product of the required fractional composition is 55‒75 m/s. The increase in the speed leads to increasing productivity, but is accompanied by the growth of specific power intensity. If the rotor speed is constant, the increase of raw material feed increases the grinder productivity, but only up to a certain value. After that, the productivity decreases because of excessive filling of the working chamber with raw materials and clogging of the grates. For each value of the knife speed, there is an optimal feed that ensures the maximum productivity. High values of knife speed lead to significant energy intensity of the process and overgrinding of raw materials. Therefore, the optimal range of knife speed is 55‒65 m/s.
Discussion and Conclusion. Effective grinding of raw materials is achieved through lower energy capacity of grinding process and absence of grate clogs resulted from separating particles from the surface of plants to be grinded.
A Vertical stratification of arthropods in the dry ecosystems of Colombian Guyana: morphological patterns and their ecological implications
Authors: Camero Rubio Edgar , Cárdenas Johanna Paola , Marín Ballesteros Jaime
Published: December 2021

Introduction: Despite growing interest by the ecosystems derived from the Guyanese formations, the vertical structure of the communities and relationships of the biota with the climatic conditions in these ecosystems are unknown. Objective: Characterize the structure and vertical composition of the arthropod fauna associated with three of the most representative ecosystems of the Northern area of the serranía de La Lindosa in Colombia based on morphological and ecological parameters. Methods: The arthropod fauna was sampled, from the subsurface soil level to the shrub and tree stratum. The fauna was determined up to the level of family or supraspecific group and the values of Alfa and Beta diversity were determined. Body length measurements were made, and the coloration and trophic level of each group were determined. Results: The composition and diversity of the arthropod fauna was different in each ecosystem and vertical stratum and most of the groups in all the ecosystems studied present low abundances. Groups of phytophagous and predatory habits were frequent in all ecosystems and the highest biomass of arthropod fauna comes from groups of polyphagous habits, of medium size and great abundance. Light and dark colorations are the most frequent in landscape-scale. Conclusion: The ecosystems studied are characterized by the low values of diversity and replacement and the large number of non-shared groups that apparently respond to the microclimatic characteristics; however, there are some generalities on a landscape scale such as the greater richness and abundance of groups in the intermediate strata, the greater proportion of groups with phytophagous habits and medium body sizes, and the predominance of dark colorations in the lower strata.
SPATIAL-TEMPORAL CHARACTERIZATION OF METEOROLOGICAL DROUGHT USING THE STANDARDIZED PRECIPITATION INDEX.CASE STUDY IN ALGERIA
Authors:   University Hassiba Benbouali of Chlef, Fellag Meriem , Achite Mohammed ,   University Hassiba Benbouali of Chlef, Wałęga Andrzej ,   University of Agriculture in Krakow
Published: December 2021

Aim of the study: In this study, the spatial and temporal characteristics of drought in the upper and middle Cheliff; a semi-arid region of northwestern Algeria was examined using the standard precipitation index [SPI] at an annual time scale as a tool for measuring the severity of meteorological drought. Material and methods: To asses of SPI annual sum of precipitation from 11 precipitation stations covering the period 1970-2009 were used. In order to identify the possible changes in the precipitation trend of the studied series, statistical tests were selected. The extent, severity and duration of the drought in the study area were obtained. Results and conclusions: Statistical tests showed that the occurrence of ruptures in the rainfall regime was detected at the end of the 1970s and the beginning of 1980s with a negative trend. The results of the SPI showed a strong existence of dry years after 1979 and 1980. The years 1993, 1999 and 2001 presented an extremely severe drought (SPI <-2). The evolution of SPI showed a dominance of the frequency of normal years (67%) and alternation of dry years (17%) and wet years (16%) over a period of 40 years. The total surface of the study area is affected by drought during severe years (1993, 1999). The study area exhibits irregularity and heterogeneity of drought due to the great variability of precipitation, it can vary from sub-basin to another and from one year to another.
ASSESSMENT OF CHANGES IN THE QUALITY OF GROUNDWATERIN THE REGION OF THE MUNICIPAL LANDFILL IN WOJKOWICE
Authors:   University of Silesia, Karkocha Radosław
Published: December 2021

Aim of the study. Landfilling is an activity, which may threaten the destruction or contamination of the soil and water environment. Pollution can be generated both by leachate and by landfill gas. Legal conditions impose on landfill managers to monitor groundwater around the landfills. The impacted soils and groundwater show high chlorides, sulphates, heavy metal concentrations especially as compared to natural hydrochemical background values. Monitoring results can be analyzed using pollution indicators. The objective of this study was to determine the quality of groundwater in a landfill in Wojkowice (southern Poland) using the Backman index. Material and methods. The novelty of the paper results from the use of a different range of parameters than initially included in the formula. The results of water quality monitoring for three piezometers from 2013–2020 were considered. The contamination index was calculated separately for each of the analysed water samples, taking into account the electrolytic conductivity and the concentration of total organic carbon (TOC), Cd, Pb, Zn, Cu, Cr and the sum of N-NO3, N-NO2 and N-NH4. Results and conclusions. The Backman index values range in the groundwater samples were –5.3 to 603. The value of the Backman index increases with the increase in the concentration of individual parameters in groundwater. In the case of heavily transformed areas, the water pollution index has high values, exceeding 3. The results of this index indicated that the quality of the groundwater around the landfill is bad. In the future, it is planned to expand the range of parameters for calculating the index.