bluuebunny/crossref_metadata_2025 huggingface dataset:
АНГЛИЙСКИЙ ЯЗЫК ДЛЯ ПРИБОРОСТРОИТЕЛЬНЫХ СПЕЦИАЛЬНОСТЕЙ
Authors: Никулина В.А.
Published: March 2022

Данная статья освещает основные методические направления, широко распространенные практике преподавания иностранных языков. Однако, автор статьи полагает, что не все описанные приёмы могут быть полностью использованы в преподавании иностранных языков слабослышащим студентам.Задача состоит в том, чтобы заимствовать то рациональное, что в них содержится, и использовать применительно к конкретным условиям.Данная статья может представлять определённый интерес для преподавателей иностранных языков, независимо от того, какой язык они преподают.

This article refl ects main methodical directions that are widely spread in foreign languages teaching.However the author of the article believes that not all described tools could be fully used in teaching hearingimpaired students.The task is to adopt the rational contents and use it in respect to concrete conditions.This article could be useful for teachers of foreign languages regardless to the languages.
THE INTERCOMMUNICATION OF EDUCATION AND CULTURE AS A VECTOR OF DEVELOPMENT OF MODERN SOCIETY
Authors: Ведман В.А.
Published: March 2022

В статье рассматривается актуальность формирования такой системы образования, которая посредством трансляции культурного опыта способствовала развитию личности, способной сохранить и поддержать многообразие культур и мировоззрений в современном мире.

The article discusses the relevance of the forming of such an education system, which through the transmission of cultural experience promoted to the development of the individual, able to preserve and maintain the diversity of cultures and ideologies in the modern world.
Comparison of approximate intermolecular potentials for ab initio fragment calculations on medium sized N-heterocycles
Authors: Barcza Bónis , Szirmai Ádám B. , Szántó Katalin J. , Tajti Attila , Szalay Péter G.
Published: March 2022

The ground state intermolecular potential of bimolecular complexes of N-heterocycles is analysed for the impact of different terms of the interaction energy as provided by various, conceptually different theories. Novel combinations with several formulations of the electrostatic, Pauli repulsion, dispersion and other contributions are tested for a good performance at both short- and long-distance sides of the potential energy surface for various alignments of the pyrrole dimer as well as the cytosine-uracil complex. The integration of a DFT/CC density embedding scheme and dispersion terms from the effective fragment potential (EFP) method is found to provide very good agreement with the reference CCSD(T) potential overall, but a QM/MM approach using CHELPG atomic point charges for the electrostatic interaction augmented by EFP dispersion and Pauli repulsion contributions comes also close. Both of these schemes has the advantage of not relying on predefined force fields, rather the interaction parameters can be obtained for the system under study, therefore excellent candidates for ab initio modeling.
Chemical Reaction Network Knowledge Graphs: the OntoRXN Ontology
Authors: Garay-Ruiz Diego , Bo Carles
Published: March 2022

The organization and management of large amounts of data has become a major point in almost all areas of human knowledge. In this context, semantic approaches propose a structure for the target data, defining ontologies that state the types of entities on a certain field and how these entities are interrelated. In this work, we introduce OntoRXN, a novel ontology describing the reaction networks constructed from computational chemistry calculations. Under our paradigm, these networks are handled as undirected graphs, without assuming any traversal direction. From there, we propose a core class structure including reaction steps, network stages, chemical species, and the lower-level entities for the individual computational calculations. These individual calculations are founded on the OntoCompChem ontology and on the ioChem-BD database, where information is parsed and stored in CML format. OntoRXN is introduced through several examples in which knowledge graphs based on the ontology are generated for different chemical systems available on ioChem-BD. Finally, the resulting knowledge graphs are explored through SPARQL queries, illustrating the power of the semantic approach to standardize the analysis of intricate datasets and to simplify the development of complex workflows.
Determination of Absorption Mass Transfer Coefficients of Methane into Drilling Fluid Base Oils
Authors: Perry Scott , Mahmud Shahriar , Chen Yuanhang
Published: March 2022

Absorption mass transfer coefficients (k_l a) of methane into two widely used drilling fluids base oils-internal olefins and diesel were determined. A laboratory-scale bubble column (0.0254m diameter and 0.71m static liquid height) was used to perform the experiments. Ranges of superficial gas velocity (0.0045-0.0491 m/s) and system pressure (100-300 psig) were covered. Based on the results, the effects of the varying parameters on k_l a have been discussed. Based on the observations, an empirical model for volumetric mass transfer coefficient as a function of superficial gas velocity and gas density was developed. This correlation fitted well (R² >0.98) with the measured k_L a values for the investigated range of operating conditions. This study gives new quantitative insights into the absorption kinetics of methane into two drilling fluid base oils, which are important for improving gas influx management with non-aqueous drilling fluids.
How Reproducible are QM/MM Simulations? Lessons from Computational Studies of the Covalent Inhibition of the SARS-CoV-2 Main Protease by Carmofur
Authors: Giudetti Goran , Polyakov Igor , Grigorenko Bella L. , Faraji Shirin , Nemukhin Alexander V. , Krylov Anna I.
Published: March 2022

This work explores what level of transparency in reporting the details is required for practical reproducibility of quantum mechanics/molecular mechanics (QM/MM) simulations. Using the reaction of an essential SARS-CoV-2 enzyme (the main protease) with a covalent inhibitor (carmofur) as a test case of chemical reactions in biomolecules, we carried out QM/MM calculations to determine the structures and energies of the reactants, the product, and the transition state/intermediate using analogous QM/MM models implemented in two software packages, NWChem and QChem. Our main benchmarking goal was to reproduce the key energetics computed with the two packages. Our results indicate that quantitative agreement (within the numerical thresholds used in calculations) is diﬃcult to achieve. We show that rather minor details of QM/MM simulations must be reported in order to ensure the reproducibility of the results and oﬀer suggestions towards developing practical guidelines for the reporting results of biosimulations.
Non-bonded force field parameters from MBIS partitioning of the molecular electron density improve CB7 host-guest affinity predictions
Authors: Gonzalez Duvan , Macaya Luis , Castillo Carlos , Verstraelen Toon , Vogt-Geisse Stefan , Vöhringer-Martinez Esteban
Published: March 2022

Binding affinity prediction by means of computer simulation has been increasingly incorporated in drug discovery projects. Its wide application, however, is limited by the prediction accuracy of the free energy calculations. The main error sources are force fields used to describe molecular interactions and incomplete sampling of the configurational space. Organic host-guest systems have been used to address force field quality because they share similar interactions found in ligands and receptors, and their rigidity facilitates configurational sampling. Here, we test the binding free energy prediction accuracy for 14 guests with aromatic or adamantane core and the CB7 host using molecular electron density derived non-bonded force field parameters. We developed a computational workflow written in Python to derive atomic charges and Lennard-Jones parameters with the minimal basis iterative stockholder method using the polarized electron density of several configurations of each guest in the bound and unbound state. The resulting non-bonded force field parameters improve binding affinity prediction, especially for guests with adamantane core in which repulsive exchange and dispersion interactions to the host dominate.
Mechanochemical approach towards multi-functionalized 1,2,3-triazoles and anti-seizure drug Rufinamide analogs using copper beads
Authors: Bhattacherjee Dhananjay , Kovalev Igor S. , Kopchuk Dmitry S. , Rahman Matiur , Santra Sougata , Zyryanov Grigory V. , Das Pralay , Purohit Rituraj , Rusinov Vladimir L. , Chupakhin Oleg N.
Published: March 2022

Highly regiospecific, copper salts-free and neat conditions have been demonstrated for the 1,3-dipolar Azide-Alkyne Cycloaddition (AAC) reactions under mechanochemical conditions. A group of structurally challenging alkynes and heterocyclic derivatives was efficiently implemented to achieve highly functionalized 1,4-disubstituted-1,2,3-triazoles in good to excellent yield by using the Cu beads without generation of unwanted byproducts. Furthermore, high-speed ball milling (HSBM) strategy has also been extended to the synthesis of commercially available pharmaceutical agent, Rufinamide, an antiepileptic drug (AED) and its analogues. The same strategy was also applied for the synthesis of Cl-derivative of Rufinamide. Analysis of the single crystal XRD data of the triazole was also performed for the final structural confirmation. The Cu beads can be easily recoverable from the reaction mixture and used for the further reactions without any special treatment.
Efficient and accurate description of Diels-Alder reactions using density functional theory
Authors: Loco Daniele , Chataigner Isabelle , Piquemal Jean-Philip , Spezia Riccardo
Published: March 2022

Modeling chemical reactions using Quantum Chemistry is a widely used predictive strategy capable to complement experiments in order to understand the intrinsic mech- anisms guiding the chemicals towards the most favorable reaction products. However, to do so, it is mandatory to use reliable and computationally tractable theoretical meth- ods. In this work, we focus on six Diels-Alder reactions of increasing complexity and perform an extensive benchmark of middle- to low-cost computational approaches to predict the characteristic reactions energy barriers. We found that Density Functional Theory, using the ωB97XD, LC-ωPBE, CAM-B3LYP, M11 and MN12SX functionals, with empirical dispersion corrections coupled to an affordable 6-31G basis set, provides quality results for this class of reactions, at a small computational effort. Such efficient and reliable simulation protocol opens perspectives for hybrid QM/MM molecular dynamics simulations of Diels-Alder reactions including explicit solvation.
Improved Electrocatalytic Selectivity and Activity for Ammonia Synthesis on Diporphyrin Catalysts
Authors: Wan Hao , bagger Alexander , Rossmeisl Jan
Published: March 2022

The electrocatalytic nitrogen reduction reaction (NRR) under mild conditions is one of the most essential challenges in chemistry. Catalysts for electrochemical NRR play a crucial role in realizing this NH3 synthesis. In this work, we use density functional theory simulations to investigate the electrocatalytic NRR selectivity and activity on dual-atom catalysts, especially diporphyrins. We classify catalysts on the basis of the adsorption of ∗N2 versus ∗H. Our results demonstrate the possibility of diporphyrins to bind and reduce N2 without producing H2 at ambient conditions, promoting the high selectivity towards NH3 formation. This is due to a chelating adsorption of N2, where N2 sits between two metal atoms, enhancing the binding of ∗N2. Additionally, the chelating adsorption of N2 activates N-N bond breaking and provides more favourable scaling relations on the adsorption energies of key intermediates, leading to the enhanced NRR activity.
Selectivity and Intrinsic Activity of Functionalized Cu Surfaces: Can the CO2 Reduction Reaction be Improved on Cu?
Authors: Christensen Oliver , Zhao Siqi , Sun Zhaozong , Bagger Alexander , Vang Lauritsen Jeppe , Uttrup Pedersen Steen , Daasbjerg Kim , Rossmeisl Jan
Published: March 2022

Cu is the only monometallic catalyst known for producing valuable multi-carbon-based products, such as ethylene and ethanol, from the CO2 reduction reaction (CO2RR). One approach to optimize the activity and selectivity of the metal Cu catalyst is to functionalize the Cu electrode with a molecular modifier. We investigate from a data standpoint whether any reported functionalized Cu catalyst improves the intrinsic activity and/or multi-carbon product selectivity compared to the performance of bare Cu foil and the best single crystal Cu facets. Our analysis shows that the reported increases in activity are due to increased surface roughness and disappear once normalizing with respect to electrochemical surface area. The intrinsic activity generally falls below that of bare Cu foil, both for total and product-specific current, which we attribute to non-selective blocking of active sites by the modifier on the surface. Instead, we show that the modifier allows for easier diffusion of CO2 compared to H2O to the surface, leading to greater selectivity for CO2RR and C2+ products. As such, there is currently not a catalyst for CO2RR that intrinsically outperforms bare Cu.
Single polymer sorbent fibers for high performance and rapid direct air capture
Authors: Sekizkardes Ali , Kusuma Victor , Culp Jeffrey , Muldoon Patrick , Hoffman James , Hopkinson David
Published: March 2022

Polymers of intrinsic microporosity (PIM) fibers based on amidoxime and amine functionalities were formulated into high- performance CO2 adsorbents. Fiber sorbents were composed of a single porous polymer component as well as molecular amines to increase the CO2 capture kinetics. The highest CO2 uptake capacity (3.3 wt% CO2 at 400 ppm) among all PIM-based sorbents to date was reported. Moreover, sorbents exhibited rapid CO2 adsorption rates (5 min adsorption cycle) and cost efficient regeneration (70oC, no vacuum) which are imperative to reducing the cost of direct air capture.
Synthesis and styrene copolymerization of novel ring-substituted isobutyl phenylcyanoacrylates
Authors: Cimino Alessandra , Azeemullah Amaan M. , Comp Danielle E. , Hunt Sydney C. , Janakis Madison M. , Khan Sonia S. , Labedz Patryk , Lee Christopher , Lotto Monique L.P. , Lowe Yasmeen , Malik Raza , Munshi Raisa A. , Persaud Udita , Rajaramsiva Saikrupa , Ramirez Maximillian A. , Rossi Claire P. , Rocus Sara M. , Schjerven William , Kharas Gregory
Published: March 2022

Novel ring-substituted isobutyl phenylcyanoacrylates, RPhCH=C(CN)CO2CH2CH(CH3)2, where R is 2-fluoro-5-iodo, 2-fluoro-6-iodo, 2-trifluoromethyl, 3-trifluoromethyl, 4-trifluoromethyl, 2-trifluoromethoxy, 3-trifluoromethoxy, 4-trifluoromethoxy, 2,4,5-trimethyl, 2,4,6-trimethyl, 2,3,5,6-tetramethyl, pentamethyl, 2,3-dimethyl-4-methoxy, 2,5-dimethyl-4-methoxy, 2,4-dimethoxy-3-methyl, 2,4-dimethoxy-6-methyl were synthesized by the piperidine catalyzed Knoevenagel condensation of ring-substituted benzaldehydes and isobutyl cyanoacetate and characterized by CHN analysis, IR, 1H and 13C NMR. The acrylates were copolymerized with styrene in solution with radical initiation (ABCN) at 70C. The compositions of the copolymers were calculated from nitrogen analysis.
Heat-Assisted Digital Light Processing of Bioactive Tough PEG Hydrogels with Complex 3D Structure
Authors: Anindita Safira Noor , Conti Riccardo , Zauchner Doris , Paunović Nevena , Qiu Wanwan , Buzhor Marina Green , Luo Zhi , Müller Ralph , Grützmacher Hansjörg , Qin Xiao-Hua , Leroux Jean-Christophe , Bao Yinyin
Published: March 2022

Digital light processing (DLP) of poly(ethylene glycol) (PEG) hydrogels with high mechanical toughness represents a long-standing challenge in the 3D printing field. Here, we report a 3D printing approach for the high-resolution manufacturing of structurally complex and mechanically strong PEG hydrogels via heat-assisted DLP. Instead of using aqueous solutions of photocrosslinkable monomers, PEG macromonomer melts were first printed in the absence of water, resulting in bulk PEG networks. Then, post-printing swelling of the printed networks was achieved in water, producing high-fidelity 3D hydrogels with complex structures. By employing a dual-macromonomer resin containing a PEG-based macrophotoinitiator, “all-PEG” hydrogel constructs were produced with compressive toughness up to 1.3 MJ.m-3. By this approach, porous 3D hydrogel scaffolds with trabecular-like architecture were fabricated, and the scaffold surface supported cell attachment and the formation of a monolayer mimicking bone-lining cells. This study highlights the promises of heat-assisted DLP in hydrogel fabrication, which may accelerate the development of 3D tissue-like constructs for regenerative medicine.
El pacto de veridicción en la serie Chernobyl. La verdad y la mentira histórica desde lo fílmico
Authors: Blanco Pérez Manuel , Cruz-González María Catalina
Published: March 2022

El 26 de abril de 1986 se produjo uno de los sucesos más importantes de la historia de la energía nuclear: el accidente de Chernóbil. Este acontecimiento histórico marcó el declive de la Unión Soviética, una agenda ambientalista y una nueva geopolítica del mundo. Ha sido retratado por la literatura, el cine, el fotorreportaje y el documental, entre otros. Este trabajo busca analizar y contrastar la serie Chernobyl de HBO (2019) y la obra Voces de Chernóbil de Svetalna Alexiévich (1997), en concreto la relación entre realidad y reconstrucción periodístico-literaria y fílmica. Para ello, utilizamos una lógica descriptiva-argumentativa y un análisis visual con metodología mixta. En el análisis se evidencia una relación conflictiva entre ambas obras, ya que los testimonios consignados en el libro son fácilmente reconocibles en la serie, sin que ésta haya especificado nunca basarse en el libro. De entre las conclusiones destaca la estructura narrativa portadora de ideología (que buscan fortalecer un imaginario colectivo sobre las parcialidades comúnmente aceptadas sobre la Unión Soviética y su modelo de socialismo) llevada a cabo con una notable dirección de arte. Por último, la serie (marcadamente antinuclear) llega en un momento de amplio debate en la sociedad civil sobre el uso de la energía atómica, justo cuando se aproxima el fin del modelo actual de generación energética basado en combustible fósil para la sociedad y la industria pesada.
Desarrollo de un nuevo modelo de evaluación competencial para la selección de una agencia de relaciones públicas y comunicación
Authors: Cuenca-Fontbona Joan , Compte-Pujol Marc , Martín-Guart Ramón , Matilla Kathy
Published: March 2022

El propósito de este artículo es el desarrollo de un modelo ex novo para seleccionar a una agencia de relaciones públicas y comunicación, o que preste servicios de relaciones públicas, basado en las percepciones de los responsables de comunicación de las organizaciones de mayor facturación españolas asociadas a la Asociación de Directivos de Comunicación-Dircom, e inspirado en el modelo matricial de una rúbrica de valoración por competencias de Goodrich (2005). 
Para este cometido se cursó un cuestionario y se hizo un análisis factorial y un análisis de contenido a la información obtenida para conocer, validar y clasificar los atributos que se utilizan cuando se selecciona una agencia de relaciones públicas y comunicación. Los resultados indican que los departamentos de comunicación consideran como atributos principales: la experiencia, la especialización en el sector y cartera de clientes; la profesionalidad, fiabilidad y calidad del servicio que se presenta; y la propuesta económica. 
Con este modelo lo que se persigue es enriquecer los capítulos que ofrece la literatura acerca de los departamentos y agencias de relaciones públicas y comunicación y, profesionalmente, ayudar a estos departamentos de comunicación a seleccionar objetivamente a una agencia de relaciones públicas y comunicación, en el marco de los modelos de decisión final.
Tipologías de paradigmas en la investigación en comunicación. Una propuesta de clasificación
Authors: Gómez-Diago Gloria
Published: March 2022

Los paradigmas, entendidos como perspectivas, son fundamentales, al dar forma a la actividad científica. En este sentido, uno de los principales motivos de la falta de institucionalización intelectual del campo de la comunicación (Peters, 2007; Lacasa, 2017) puede ser la carencia de memoria disciplinar (Pooley, 2020) y la falta de discusión de las perspectivas desde las que se investiga. Es necesario contribuir a colmar el vacío epistemológico de un campo que se perfila como muy relevante en las próximas décadas, al necesitarse de una perspectiva comunicativa que posibilite generar entornos más democráticos. En una línea de trabajo situada en la confluencia de la meta-investigación con la historia de la investigación en comunicación, que denominamos meta-investigación de las ideas (Gómez-Diago, 2020, 2021.a, 2021.b), mediante una revisión de trabajos referentes publicados en las últimas cinco décadas, en los que se aborda el papel de los paradigmas en el campo de la comunicación; se identificaron tipologías de paradigmas y se ordenaron en tres categorías referidas a aquello que atienden: 1) Maneras de obtener conocimiento, 2) Formas de estudiar los medios de comunicación y 3) Formas de entender la comunicación. Es a partir de esta última perspectiva tipológica centrada en los diferentes significados que se pueden atribuir a la comunicación, a partir de la que es factible ir (re) construyendo una epistemología para el campo de la investigación en comunicación que (re)actualice la(s) concepción(es) de la comunicación de forma que permita dar cuenta de una sociedad en transformación, al mismo tiempo que contribuir a mejorar sus condiciones.
LINE-1 and SINE-B1 mapping and genome diversification in Proechimys species (Rodentia: Echimyidae)
Authors: Soares Simone Cardoso , Eler Eduardo Schmidt , e Silva Carlos Eduardo Faresin , da Silva Maria Nazareth Ferreira , Araújo Naiara Pereira , Svartman Marta , Feldberg Eliana
Published: March 2022

This study aimed to understand the impact of LINE-1 and SINE-B1 retroelements on the architecture and karyotypic diversification of five rodent species of the genus Proechimys from different regions of the Amazon. Karyotype comparisons were performed using fluorescent interspecific in situ hybridization. The L1 and B1 retroelements showed a non-random arrangement and a conserved pattern when the genomes of the five species of Proechimys were compared, including the two cytotypes of Proechimys guyannensis. The signal homeology among the chromosomes and the degree of similarity among the formed clusters indicate rearrangements such as fusion/fission, and demonstrates that these retroelements can behave as derived characters shared in Proechimys. The differentiated distribution and organization of these retroelements in the karyotypes and in the chromosomal fiber, respectively, may represent a strong indication of their role as generating sources of karyotypic diversity in the genus Proechimys and provide insights into the evolutionary relationships between taxa.
Rab11 endosomes and Pericentrin coordinate centrosome movement during pre-abscission in vivo
Authors: Krishnan Nikhila , Swoger Maxx , Rathbun Lindsay I , Fioramonti Peter J , Freshour Judy , Bates Michael , Patteson Alison E , Hehnly Heidi
Published: March 2022

The last stage of cell division involves two daughter cells remaining interconnected by a cytokinetic bridge that is cleaved during abscission. Conserved between the zebrafish embryo and human cells, we found that the oldest centrosome moves in a Rab11-dependent manner towards the cytokinetic bridge sometimes followed by the youngest. Rab11-endosomes are organized in a Rab11-GTP dependent manner at the mother centriole during pre-abscission, with Rab11 endosomes at the oldest centrosome being more mobile compared with the youngest. The GTPase activity of Rab11 is necessary for the centrosome protein, Pericentrin, to be enriched at the centrosome. Reduction in Pericentrin expression or optogenetic disruption of Rab11-endosome function inhibited both centrosome movement towards the cytokinetic bridge and abscission, resulting in daughter cells prone to being binucleated and/or having supernumerary centrosomes. These studies suggest that Rab11-endosomes contribute to centrosome function during pre-abscission by regulating Pericentrin organization resulting in appropriate centrosome movement towards the cytokinetic bridge and subsequent abscission.
Water- and frost-resistance of crushed stone mastic asphalt concrete prepared on sevilen-modified bitumen
Authors: Yadykina V. V. , Navolokina S. N. , Gridchin A. M.
Published: March 2022

Introduction. Currently, increasing the durability of road asphalt concrete pavements is one of the urgent issues, the solution of which provides a significant economic effect achieved by increasing the turnaround time, as well as the overall service life of highways. Asphalt concrete pavements with prolonged wetting due to weakening of structural bonds can be destroyed due to crumbling of mineral grains, which leads to increased wear of the pavement and the formation of potholes. Water penetrates into micro defects in the structure of asphalt concrete, leading to a decrease in the strength of the material. As a result, the corrosion resistance of asphalt concrete is reduced. To improve the quality of the binder and the durability of the asphalt concrete pavement, in particular from crushed stone-mastic asphalt concrete (SMA), various modifying additives, including polymer ones, are used. In this regard, a promising direction is the use of polymers containing active groups, which are able to provide an increase in adhesion to mineral materials, including those from acid rocks, and, consequently, water resistance. One of these is the ethylene vinyl acetate copolymer (EVAC).Materials and methods. In order to study the effect of sevilen on the water and frost resistance of asphalt concrete mixtures, crushed stone-mastic asphalt concrete mixtures were prepared based on bitumen modified with БНД 70/100 sevilen made in the Moscow Oil Refinery Plant was used as the initial bitumen in the preparation of modified binders. Tests of crushed stone-mastic asphalt concrete mixtures were carried out for the indicator of the content of air voids in accordance with GOST R 58406.8.2019, the coefficient of water resistance in accordance with GOST R 58401.18-2019 and frost resistance in accordance with GOST 12801-98.Results. It has been established that the content of air voids in asphalt concrete samples significantly decreases with an increase in the concentration of sevilene, which will further contribute to a higher frost resistance of the road surface. It is shown that the use of sevilen with 22% vinyl acetate makes it possible to increase the coefficient of water resistance of asphalt concrete mixtures due to the presence of polar molecules in the composition of ethylene vinyl acetate, actively interacting with the mineral components of the asphalt concrete mixture. The use of sevilen improves the frost resistance of asphalt concrete samples. So, the smallest decrease in strength in tests for frost resistance was shown by samples with 5% sevilene. It was found that polymer asphalt concrete based on binder with sevilene containing 22% vinyl acetate, which corresponds to the maximum basicity of the polymer, has the highest resistance to humidity and temperature effects of the environment.
Mathematical model for vertical miller operation when snow mass transportation
Authors: Aleshkov D. S. , Sukovin M. V.
Published: March 2022

Introduction. An increase in the efficiency of snow removal work is due to an improvement in the characteristics of all components of this process, however, the creation of fundamentally new design schemes for snow blowers allows us to make qualitative changes in the problem of winter maintenance of roads, residential areas, etc. Materials and methods. A description of analytical studies of the dependence describing the design parameters of the feeder cutter for a rotary-milling snow blower is presented, on the basis of which the concept of a fundamentally new design of the feeder for a rotary-milling snow blower is formed. The description of the mathematical model of the presented design of the feeder is given.The structural scheme of the vertical cutter of the feeder of the rotary-milling snow blower is presented. Described are the main assumptions made in the compilation of the design scheme for the operation of the vertical cutter of the feeder of the rotary-milling snow blower. Equations have been obtained that describe the movement of a group of snow particles transported by a vertical mill and interact with each other in the process of movement, analytical dependences of the forces of normal reactions of the working elements of a vertical miller on its design and technological parameters. The initial conditions for the numerical solution of the presented equations of operation of the vertical milling cutter of the feeder of a rotary-milling snow blower are described.Results. The structural scheme of the vertical cutter of the feeder of the rotary-milling snow blower is described. Described are the main assumptions made in the compilation of the design scheme for the operation of the vertical cutter of the feeder of the rotary-milling snow blower. Equations are obtained that describe the movement of a group of snow particles transported by a vertical mill and interact with each other in the process of movement, analytical dependences of the forces of normal reactions of the working elements of a vertical mill on its design and technological parameters. The initial conditions necessary for the numerical solution of the presented equations of operation of the vertical milling cutter of the feeder of the milling-rotary snow blower are determined.Discussion and conclusion. The description of the mathematical model of the original design of the feeder of the throw-away snow blower is given. The necessity of a more complete substantiation of the initial conditions for the numerical solution of the equations of the work of the feeder of the throwing snow blower is indicated. This mathematical model makes it possible to proceed to a detailed study of the described cutter design in order to determine the working ranges of the design and technological parameters of the feeder with a vertical cutter.
Drive electrical parameters applicability evaluation to determine loads on bridge crane lifting mechanism
Authors: Ivanov S. D. , Nazarov A. N.
Published: March 2022

Introduction. The problem of existing recorders of crane operation parameters in the direction of determining the intensity of work of mechanisms is revealed. The necessity of increasing the number of information sources is determined. Application of current parameters of the electric motor as a source of primary information is suggested.

Materials and methods. The characteristics of the experimental setup are presented. The validity of information sources has been evaluated on the lifting mechanism. Formulas for determining the error of calculating the stator current and active power parameters and for determining the coefficient of proportionality of the load on the drive and the information parameter are given.

Results. Tables and graphs of calculated mechanism load in terms of stator current and active power over the whole range of operating loads are presented. The dependence of accuracy of load determination on changes of supply mains voltage has been investigated.

Conclusions. As information source of the load on the crane hoisting mechanism it is recommended to apply an active drive power. The given parameter has shown the big stability to voltage changes in comparison with a current of stator. It was possible to reach accuracy of definition of a load of 2,6 % at requirement of 3 %.
Methodology to determine the probalistic demand of mass attraction centers based on the classification within the framework of macrosystems theory
Authors: Agureev I. E. , Pyshnaya G. E. , Pyshnyi V. A.
Published: March 2022

Introduction. The calculation of correspondence was described at the beginning of the 20 century in the form of a gravitational model and is based on analogy with the law of universal gravitation. The development of this model can be called J. Wilson’s approach, in which correspondence calculations are performed using an entropy model. The entropy approach operates with various expressions for the entropy of a macroscopic system. At the same time, its equilibrium is achieved at the maximum value of the selected entropy function. The purpose of this work is to develop a methodology for determining the probabilistic demand of mass attraction centers - Shopping centers and to demonstrate the results of its application on the example of shopping centers located on the territory of the city of Tula. Probabilistic demand is necessary to obtain the so-called ‘a priori probabilities’ in the expression of the entropy of the transport macrosystem.Methods and Materials. For the development of the methodology, as well as its further use, the most convenient and promising scientific platform is the theory of transport macrosystems, which is a special case of the general theory of macrosystems. Developed in the works of mainly domestic scientists, it allows you to perform various tasks specific to transport systems.Conclusions. The method of determining the probabilistic demand of the mass attraction centers -Shopping centers, which consists in obtaining a priori probabilities of being in them and their capacities for solving problems of finding equilibrium distributions of visitors, was developed with the aim of further developing the macroscopic approach in the study of Shopping centers. The main purpose of the technique is to use the results obtained in solving problems about the equilibrium states of the drains of transport and the road network in the framework of the theory of transport macrosystems.
Literature Analysis and Future Research Framework in Improvement and Substitutes Strategies
Authors: Malik Yaumil Fauzan , Ernawati Dyah Poespita
Published: March 2022

Abstract

The aim of this paper is to examine improvement strategy using 4 approaches categorized as “substitutes for strategy” in operations strategy and to propose a framework for future research. This paper used a descriptive approach to examine peer-reviewed articles that were selected for analysis purposes. The analysis revealed that the majority of previous studies always used the principle of continuous improvement in 3 operating concepts, namely TQM, Lean, and Six Sigma, and the use of the breakthrough improvement strategy in the concept of Business Process re-engineering. Therefore, this study proposes a future research framework that is related to operational management concepts but uses the opposite improvement strategy approach. This article provides a future research framework that can be used as a basis for other researchers in the future to examine TQM, Six Sigma, Lean, and BPR from different perspectives of the improvement strategy. Professionals who worked in the operations field can use the framework provided in this article to view the company's strategy from a different perspective to gain a competitive advantage for their organization. Improvement Strategy, Continuous Improvement, Breakthrough Improvement, Total Quality Management, Lean Operations, Six Sigma, Business Process Re-engineering.
CODE SWITHING IN EFL CLASSROOM (A CASE STUDY AT A STATE SENIOR HIGH SCHOOL IN KUPANG)
Authors: Benu Naniana Nimrod
Published: March 2022

This paper is dealing with the issue of code-switching in English classrooms and to investigate when and why teachers in ELT class code-switch when teaching English as a foreign language. Beside observing  teaching and learning process in classroom, two EFL teachers were interviewed and responded to questionnaire. The results showed, as observed, code-switching occurred during the whole process of class by both teacher and students. Based on the interview and respond to the questionnaire, teachers generally tried to code-switch as little as possible but that they did code-switch in some of those situations where the students preferred either a combination of Bahasa Indonesia and English. Teachers’ perception on the students language competence influence the strategy used in teaching English to the class. The teachers code-switched during the class process for different purposes and they all believed that it was an effective tool to enhance learning when employed carefully. Keywords: code-switching; English as a foreign language; classroom
LEARNING BEYOND THE CLASSROOM: WHATSAPP IN LANGUAGE LEARNING
Authors: Rahman Ali Wira , Patintingan Amir , Indahyanti Rizka
Published: March 2022

This research is intended to increase space and time in learning English, where space and time for English is very difficult to find in Indonesia. Through Mobile applications, learning will be more exclusive so as to reduce psychological barriers and cut the gap between teachers and students. They will feel more confident in expressing their opinions. This lesson will also be more constructive, give each other feedback between students and students and lecturers with students. This research will begin with the observation process to determine the object and location of the research. The use of WhatsaApp in learning will be conducted outside the classroom by determining the regular schedule and consistently. Begin by creating a group of 5 students with low levels of English language skills. The feature to be used is voice comment/messaging. Speaking skills will be the focus of this research. The method to be used is a combination of quantitative and qualitative (Mixed Method). Observations and interviews as qualitative representations and measurements of audio / speaking duration represent quantitative. The results of the study indicate that the use of WhatsApp in supporting learning outside the classroom provides varied progress. The review is measured from several aspects, namely Gender, Duration, Personal Margin Duration, Total Duration and Overall Personal Average.
TEACHER TALK AND INSTRUCTIONAL LANGUAGE CHOICE: TWO PROBLEMS ENCOUNTERED IN EFL CLASSROOM
Authors: Pratiwi Widya Rizky
Published: March 2022

When we agree with the internalization of a foreign language acquisition centered in the classroom, teacher talk plays the most important role to achieve the success of teaching and learning. However, a high intensity of teacher talk and the hesitation of instructional language choice become two common problems are usually faced. Therefore, it seems important to present a variety of literature reviews to be considered by teachers which may be used as the reference to solve the problem. This study presented the concept of teacher talk at classroom interaction, monolingual and bilingual approach in EFL classroom and some previous research findings “the rationales for supporting bilingual approach” which were gained from some articles. This study suggests that teachers have to control the quantity and quality of their talk to gain an effective teaching and learning process in the EFL classroom. It is more advantageous to reduce Teacher Talk Time and increase Student Talk Time based on the students’ need because too much teacher talk will have an impact on decreased student learning motivation. When teaching EFL students, it will be helpful for overcoming cognitive difficulties if teachers insert mother tongue for the certain condition such as to translate difficult words from reading the text and to explain grammar. However, the teachers have to keep a principled and judicious use of mother tongue because a very high proportion of it also limits the students’ achievement. If the students are exposed more to the second language, they will become more successful
THE EFFECTIVENESS OF STUDENT TEAMS ACHIEVEMENT DIVISION TO TEACH WRITING VIEWED FROM STUDENTS’ CREATIVITY
Authors: Rahmatika Annisa , Asib Abdul , Suparno Suparno
Published: March 2022

Student Teams Acievement Division (STAD) is one of the simplest of all cooperative learning methods, where team works in learning English provides students with the team opportunity to express and to communicate with each other. One of the ways to make them express and communicate with each other is by dividing the class into several team works or groups. This experimental study sought to find out the effectiveness of STAD to teach writing viewed from students’ creativity in the tenth grade of SMAN 1 JATIWARAS Tasikmalaya in the academic year of 2017/2018. Recruitment strategy was through cluster random sampling resulting 2 classes which consist of 28 students of each class contributed to the study. Data collection technique encompassed creativity test and writing test. The data were analyzed thoroughly by using 2x2 Multifactor Analysis of Variance (ANOVA) and Tukey’s HSD Test. The result revealed that: (1) Student Teams Acievement Division (STAD) is more effective than Direct Method to teach writing; (2) students having high creativity have better writing skill than those having low creativity. (3) there is an interaction between teaching methods and students’ creativity.
TEACHERS' BELIEFS ON MULTIPLE INTELLIGENCE BASED ENGLISH TEACHING FOR YOUNG LEARNERS
Authors: Faidah Ririn Tutik , Fauziati Endang , Suparno Suparno
Published: March 2022

Multiple intelligences theory asserted that human intelligence is not only measured by standardized IQ test on verbal and mathematical ability. However, this theory assumed that human intelligences contains of nine types of intelligences showed by each individual. By recognizing the different type of intelligences, it will help to know the different style of learners. Starting from this point, many teachers who understand the differences in learning among the students, they started to implement this theory for their instruction in order to improve the quality of teaching. This study was aimed to explore the teachers’ beliefs about the use of multiple intelligences based English teaching for young learners. The researcher used descriptive qualitative design to explore the teachers’ beliefs on the use of multiple-intelligences based English teaching for EFL young learners. This study was conducted in one of the elementary schools in Surakarta, which implemented multiple intelligences theory as a system in their instruction process. Two teachers were chosen to participate in this study and data was collected through the interview. The finding revealed that teachers’ beliefs on multiple intelligences theory based English teaching for young learners are a best strategy to be implemented in current teaching and learning process at their school. They believed that multiple intelligences system enhance the students’ achievement. They also realized the importance of the multiple intelligences theory based English teaching to improve their instruction.
2021-2022 IgNITE Medical Case Competition: Immunity
Authors: Bojic Danny , Bezuidenhout Bianka , Gill Hertek
Published: March 2022

The IgNITE Medical Case Competition is an annual research case competition organized by students across North America. Our mission is to provide high school and university students the opportunity to gain valuable research experience while networking with industry professionals. Each year, students in teams of 1-4 are paired with an experienced mentor to develop and present a novel research proposal within a specified theme of the competition. Students are taught the fundamental scientific principles underlying three lab techniques that they can then use during the competition in their proposal or their future research career. This year's theme was Immunity, and competitors learned about Tissue Culturing, ELISA, and Flow Cytometry. Furthermore, this year, the IgNITE community grew internationally with 670 high school and university students competing. This booklet presents the Top 40 teams' abstracts, and we invite you to visit our website (www.ignitecompetition.org) to watch the associated elevator pitch videos. We hope you enjoy reading through some of this year's top proposals and hope you will join our growing community.
ANALISIS SISTEM ON LOAD TAP CHANGER (OLTC) PADA TRANSFORMATOR 150/20 KV UNTUK MENJAGA KESTABILAN TEGANGAN PADA GI KALIWUNGU JAWA TENGA
Authors: Rafianto Andy
Published: March 2022

EnglishThe State electricity company (PLN) as a processor of electricity needs to provide electrical power services in accordance with the needs of consumers by providing power systems that have quality, continuity and high reliability, this can be achieved if the power system has a stable and constant voltage at a predetermined value. To maintain the output voltage on the secondary side of the transformer to remain constant at a value of 20 kV then use a tapping converter mounted on a 150/20kV power transformer and Work automatically on any voltage changes caused due to the voltage drop caused by the change of load and the length of the cable. The purpose of this research is to know the calculation step determines the change from (on load tap changer) to improve the secondary side voltage of power transformer 150/20 kV with the calculation of the output voltage of the transformer such as calculating the impedance value of the transformer, calculate the voltage drop across the transformer and calculate the output voltage of the transformer after the voltage on the secondary side of the transformer there is a decrease in the output voltage of the transformer beyond the specified setting, the next process is tap transfer according to tap settings. On the above calculation analysis then we will know whether the repeater is still below the standard SPLN (Attachment of the decision of the board of directors PLN) 72 1987 is the maximum voltage drop 5% on the secondary side.IndonesianPerusahaan Listrik Negara (PLN) sebagai pengolah kebutuhan listrik berusaha memberikan pelayanan ketenaga listrikan sesuai dengan kebutuhan konsumen dengan menyediakan sistem tenaga listrik yang mempunyai mutu , kontinuitas dan keandalan yang tinggi, hal ini dapat dicapai apabila sistem tenaga listrik mempunyai  tegangan yang stabil dan konstan pada nilai yang sudah ditentukan. Untuk mempertahankan tegangan keluaran pada sisi sekunder transformator agar tetap konstan pada harga 20 kv maka digunakan pengubah sadapan yang dipasang pada transformator daya 150/20kV dan bekerja otomatis pada setiap perubahan tegangan yang disebabkan adanya jatuh tegangan karena adanya perubahan beban dan rugi hantaran. Tujuan dari penelitian ini adalah mengetahui langkah perhitungan menentukan perubahan on load tap changer dalam memperbaiki tegangan sisi sekunder transformator daya 150/20 kV dengan analisa perhitungan tegangan keluaran transformator diantaranya menghitung nilai impedansi trafo, menghitung drop tegangan pada trafo dan menghitung Vout transformator setelah mengalami drop tegangan, apabila tegangan keluaran transformator diluar setting yang telah ditentukan, selanjutnya dilakukan tahap pemindahan posisi tap pada trafo sesuai setting. Dengan analisa perhitungan diatas maka kita akan mengetahui apakah penyulang masih dibawah standar SPLN (Lampiran Surat Keputusan Direksi PLN) 72 1987 yaitu maksimal jatuh tegangan 5% pada sisi sekunder.