bluuebunny/crossref_metadata_2025 huggingface dataset:
Relation Between Religion and Film: The Commodication of Quranic Verses in Indonesian Religious Films 2008-2020
Authors: Rahmatikawati Yayan , Rusmana Dadan , Jauhari Akhmad
Published: July 2021

This article describes the use of Quranic verses in Indonesian religious films released in 2008-2020. This study investigates Indonesian religious movies based on the Quranic verses, the contexts, and the purposes for which they are used. The theories applied on the religious films by Rachel Dwyer (2006) and relations of religion from films by Gregory J. Watkins (2008). The method used in this research is descriptive, in which the researcher interprets the religious film based on text through content analysis. The results show that there are films that use religious interpretation, such as presenting cultural values related to religion, encourage religious life, and religious critic.
Peran Father Involvement terhadap Self Esteem Remaja
Authors: Risnawati Erna , Nuraqmarina Fatma , Wardani Laila Meiliyandrie Indah
Published: July 2021

The purpose of this study is to examine the role of fathers involvement in parenting towards the development of self esteem in adolescents. This research used quantitative method with purposive sampling technique. The participants were 149 adolescents who live with the their fathers. This study used self esteem scale by Rosenberg and father involvement scale which was developed by researcher based on the theory of Goncy and Van Dullman. The data analysis result using regression test shows that the contribution of the role of the father involvement on adolescent's self esteem is 38%, while the other 62% was caused by other factors. This finding indicate that the greater role of father in parenting, the higher self esteem. This study hopefully can increase father’s awareness and brings new pattern of family parenting about their roles that not only in economic but also for the psychological effect, especially self esteem.
Kualitas Hidup Remaja Berstatus Sosial Ekonomi Rendah: Bagaimana Kontribusi Resiliensi Keluarga?
Authors: Ramadhanty Fathin Nazifa , Kinanthi Melok Roro
Published: July 2021

Adolescents from low socioeconomic status are prone to have poor quality of life. To gain optimal functioning, it is important to ensure they experience good quality of life. This study aims to examine whether family resilience affect quality of life among adolescent from low socioeconomic status in Jakarta.  There were 130 participants in this quantitative study. Convenience sampling were applied to select participants. We used Indonesian version of WHOQoLBREF to assess quality of life and Walsh Family Resilience Questionnaire to assess family resilience.  Data were analyzed by regression analysis and stated family resilience has significant positively contribution to quality of life among participants. For each dimension, the contribution of family resilience to quality of life was 7% to 16.4%. It may indicate that family strength-based approach should be added in developing intervention to enhance quality of life among adolescents from low socioeconomic status in Jakarta.
Od znaków czasu do czasu znaków. Teologiczne mankamenty nauczania ks. Dominika Chmielewskiego w Kecharitomene
Authors: Wiśniewski Sebastian
Published: July 2021

W artykule wskazane zostały pewne wątpliwości teologiczne, jakie nasuwają się podczas lektury książki ks. Dominika Chmielewskiego zatytułowanej Kecharitomene. Omawiana książka cieszy się zainteresowaniem wielu katolików w Polsce. Literatura religijna zajmuje ważne miejsce w formacji religijnej osób wierzących. Dobrze się dzieje, jeśli katoliccy autorzy dążą do wyjaśniania nauki Kościoła. Tymczasem treść prezentowanej publikacji nie jest wolna od pewnych kłopotliwych zwrotów i twierdzeń, które mogą ukierunkować czytelnika na meandry teologii.
Mental health of people involved in natural disasters from the perspective of the workers involved
Authors: Rafaloski Alessandra Rossoni , Zeferino Maria Terezinha , Forgearini Bárbara Aparecida Oliveira , Fernandes Gisele Cristina Manfrini , Menegon Fabrício Augusto
Published: July 2021

RESUMO O fenômeno do desastre causa sérios impactos à população que está direta ou indiretamente envolvida. Este estudo teve como objetivo compreender a atenção psicossocial às pessoas em situação de desastre no município de Blumenau na ótica dos trabalhadores envolvidos. Trata-se de uma pesquisa qualitativa, exploratória, descritiva, realizada no contexto de um município com recorrentes desastres naturais que marcam a história da população. A coleta de dados se deu por meio de entrevistas semiestruturadas, realizadas com trabalhadores do setor saúde, defesa civil e corpo de bombeiros, selecionados pela técnica Bola de Neve. Os dados foram analisados pelo método de análise de conteúdo. Como resultado, descrevem-se três unidades de análise: Evento inesperado com a população desprevenida; Aumento do número de pessoas em sofrimento psíquico e agravo dos casos já em tratamento; Estratégias atuais do município, discutindo-se os conceitos de crise, trauma e síndrome disruptiva como efeitos à saúde mental nos desastres. Conclui-se que a atenção psicossocial na situação de desastre precisa ir além, deve estar mais atuante na prevenção, durante e no pós-desastre, garantindo o cuidado integral a todas as pessoas envolvidas.
Rompimento da barragem em Brumadinho: um relato de experiência sobre os debates no processo de desastres
Authors: Costa Giulia Balbi Rodrigues da , Lau Geórgia Rolemberg , Silva Camilla Ferreira da , Mantel Maria Clara Barroso , Peres Maria Cristina Mitsuko , Luna Tatiane Nunes da Silva Santos , Silva Priscila Neves da
Published: July 2021

RESUMO O presente artigo teve como objetivo aprofundar discussões do desastre ocorrido em Brumadinho (MG), em janeiro de 2019. A partir da relatoria do seminário ‘Desastre da Vale S.A. em Brumadinho: seis meses de impacto e ações’, seis alunas do Curso de Especialização em Saúde Pública da Fundação Oswaldo Cruz (Fiocruz) e uma pós-doutoranda da Fiocruz de Minas Gerais realizaram transcrições de falas feitas durante o evento na tentativa de reportar essa vivência mediante lugares de fala distintos. Experiências artísticas retratadas ao longo do texto estabelecem um vínculo com a subjetividade dos atingidos e seu entorno. Portanto, o artigo pretendeu seguir esse caminho.
Enhanced electrochemical performance of Li-rich cathode material for lithium-ion batteries
Authors: Xiao Jun , Li Xiao , Tang Kaikai , Long Mengqi , Chen Jun , Wang Dandan , Gao Hong , Liu Hao
Published: July 2021

Lithium (Li)-rich cathodes have attracted great attention due to their high specific capacity and energy density. However, their dramatic capacity fading limits their practical application for lithium-ion batteries. Surface coating is recognized as a universal technology for improving the capacity retention of electrodes for many energy-storage applications. In this work, an aluminum fluoride (AlF3)-coated lithium-rich cathode with a rod-shaped structure is synthesized through a hydrothermal method, followed by a chemical coprecipitation process. The aluminum fluoride protective layer provides ideal elastic buffer interspace to ameliorate the structure stability and expedite the lithium-ion (Li+) diffusion dynamics, ensuring excellent electrochemical performance. Thereby the as-prepared aluminum fluoride-coated electrode has a high reversible discharge capacity of 195.6 mAh/g after 130 cycles at 0.1 C, corresponding to 89.9% of its initial specific capacity. A discharge capacity of 133.4 mAh/g can be achieved even at 2 C, much higher than that of the bare lithium-rich electrode (101.5 mAh/g). These results indicate that aluminum fluoride coating is an effective strategy to improve the electrochemical performance of lithium-rich cathodes.
Experiencing the Peer Feedback Activities with Teacher’s Intervention through Face-to-Face and Asynchronous Online Interaction: The Impact on Students’ Writing Development and Perceptions
Authors: Astrid Annisa , Rukmini Dwi , Fitriati Sri Wuli , Syafryadin
Published: July 2021

The objectives of this study were to compare the impact of peer feedback implementation with teacher involvement through training in the classroom and asynchronous online communication on the quality of students' writing revisions, as well as to investigate students' perceptions of peer feedback activities. Twenty-five students participated in the experimental study. Eleven students were willingly to be interviewed. Inferential statistical analysis was used to interpret the quantitative data collected from students’ essay writing scores. Meanwhile, the data obtained through observations and interviews was interpreted using qualitative coding analysis. The results of the inferential statistical analysis revealed that peer feedback activities conducted through asynchronous online interactions had more significant effects compared to those conducted face to face on students’ writing revision. Further, after conducting a thematic analysis, six themes emerged: 1) peer feedback activities could increase students’ autonomy in learning, 2)  the teacher's involvement in peer feedback activities was beneficial in terms of improving the consistency of feedback and revision, 3) peer feedback through asynchronous online interactions gave extra time to produce more beneficial comments, 4) peer feedback activities through asynchronous online interactions gave more chances to become a writing audience, 5) communicating via Facebook made the students feel awkward, and 6) recorded feedback via Facebook comments was more beneficial for students’ revision. The implication of the research is that teachers of English needs to consider asynchronous online interactions for students’ writing revision when teaching writing.
Nitric acid digestion procedure for plant matter analysis with FAAS and MP-AES v1
Authors: Schuurmans Julia
Published: July 2021

The procedure describes the preparation and procedure plant material undergoes for preparation of an acid digestion to be used in a analytical detection analysis with a spectroscopy instrument. Steps include the drying and pulverising of plants, the preparation and cleaning of glassware prior to an acid digestion and the digestion trials of blank material and spiked material. The steps also include creating calibration standards to prepare for the detection analysis with either FAAS, MP-AES, ICP-MS or ASV.
Mobile Phone Spectrophotometer Setup [Chlorophyll experiment version] v1
Authors: E Hubbard Katharine
Published: July 2021

This protocol allows you to turn a mobile phone (smart phone) into a colorimeter/spectrophotometer. It goes through how to set up your phone and workspace, making up a dilution series, constructing a calibration curve and making measurements. The protocol is designed so that it can be carried out independent of a laboratory - our undergraduate students used it as an at home experiment during the Covid-19 pandemic. This version of the protocol is used to test the hypothesis "Chlorophyll content from sun leaves will be greater than shade leaves from the same plant". The chlorophyll extraction requires you to have access to either 80% acetone (v/v with water) or an acetone based nail polish remover. Note that you will need to test whether your nail polish remover reacts with the plastic cuvettes or not before continuing with the experiment - some of our students found that their cuvettes dissolved using the nail polish remover directly. The protocol is inspired by and adapted from this video - smartphone spectrophotometer
Method of reconstructing dynamic load characteristics for durability test Indexed by: of heavy semitrailer under different road conditions
Authors: Czarnuch Arkadiusz , Stembalski Marek , Szydłowski Tomasz , Batory Damian
Published: July 2021

The aim of the article is to present and validate a methodology for collecting road load data on a vehicle, driving on roads and analysis of a drive data signal under the wheel in the time domain, using FRF (Frequency Response Function) and the MTS 320 eight-poster inertia reacted road simulator. The elaborated drive data, was used to control the actuators forcing the movements of the wheels and the coupling part of the semi-trailer during durability tests. The road tests were carried out by registering physical variables in the time domain, by a set of sensors mounted on a vehicle. The data was collected from roads categorized as motorways, national and local roads. Differences between the variability of the parameters, collected on the roads and the variability of the drive data under the wheel, were determined for the particular types of roads, for loaded and unloaded vehicle. The obtained accuracy of reconstruction of the road load data conditions was as high as 97%. Therefore, the proposed method is suitable for reliable durability tests with use of the road simulator.
Preservation of sugarcane silage with urea and calcium oxide: performance and metabolic efficiency of dairy cows
Authors: Martins Susi C S G , Carvalho Gleidson G P , Pires Aureliano J V , Leite Laudí C , Lago-Novais Daiane , Oliveira Ronaldo L , Cirne Luis G A , Carvalho Bruna M A
Published: July 2021

Background: Inclusion of urea and calcium oxide (CaO) during sugarcane ensilage has been hypothesized to improve dairy cow performance. Objective: To evaluate the use of urea and calcium oxide as additives to preserve sugarcane silage quality and determine whether they improve dairy cow performance and metabolic efficiency. Methods: Four diets were used: sugarcane silage without additive (SS), sugarcane silage with 10 g/kg urea (SU), sugarcane silage with 5 g/kg urea + 5 g/kg CaO (SUC), and sugarcane silage with 10 g/kg CaO (SC). Eight crossbred cows at approximately 100 days of lactation were distributed in two 4x4 Latin squares, and their diets were formulated to reach an average milk production of 15 kg/day. Results: Dry matter, non-fibrous carbohydrates, organic matter, total carbohydrates, and total digestible nutrient intake were the highest (p<0.05) for the cows fed SC. Urinary excretion of nitrogen was higher (p<0.05) for cows fed diets based on SUC than those fed diets with SC. Milk urea nitrogen content was the highest (p<0.05) in animals fed SU diets. Nitrogen balance was positive in all treatments; however, the microbial protein synthesis was low for all diets. Conclusions: The diet with SU showed the highest nitrogen loss through the milk. Among the evaluated silages, those with SC and SUC are recommended to promote a high intake of nutritional components.
In vitro antimicrobial activity of Caesalpinia coriaria (Jacq.) Willd extracts on Streptococcus pyogenes and Candida albicans
Authors: Lopez-Pazos Silvio Alejandro , Pitre-Ruiz Leanis , Galván-Ayala Deycis , Ávila Mendez Kelly Johanna , Castro-Uriana Omar
Published: July 2021

Background: “Dividivi” Caesalpinia coriaria (Jacq.) Willd fruits are traditionally used by the Wayuú community in La Guajira (Colombia) to treat oral and skin cavity diseases caused by bacteria and fungi. Streptococcus pyogenes is a gram-positive cocci of group A (beta-hemolytic) that is the cause of pharyngeal disease, scarlet fever, cellulitis, erysipelas, or toxic shock-like syndrome. Alternatively, Candida albicans is a yeast-like fungus that is a normal flora of the digestive tract, vagina, or skin folds; it has been known to be the root cause of opportunistic diseases such as diaper rash, oral and esophagus thrush, or vulvovaginitis. Objective: This study evaluated the antimicrobial activity of methanolic and ethanolic extracts of C. coriaria (Jacq.) Willd dry fruits on S. pyogenes ATCC 12384 and C. albicans ATTC 14053. Method: C. coriaria extracts were obtained from the Soxhlet method using two solvents (methanol and ethanol 98%) prepared from pulverized fruits. A phytochemical test and an antimicrobial activity assay were performed using the obtained extracts and tested using S. pyogenes ATCC 12384 and C. albicans ATTC 14053 strains. Results: A phytochemical profile was performed, examining the presence of bioactive metabolites (tannins, alkaloids, glycosides, saponins, and anthraquinones) from each extract. Antimicrobial susceptibility tests showed that the ethanolic extract inhibited S. pyogenes ATCC 12384, causing inhibition halos of 14.1 ± 0.1 mm and a Minimum Inhibitory Concentration (MIC) of 172 mg/ml, and C. albicans test shows inhibition halos of 16.1 ± 0.2 mm and MIC of 212 mg/ml. Additionally, the methanolic extract inhibited S. pyogenes with inhibition halos of 15.2 ± 0.2 mm and MIC of 152 mg/ml; no inhibitory effect was observed on C. albicans. Conclusion: This study revealed that C. coriaria has an antimicrobial effect on the tested species opening the field of its possible use as a therapeutic agent.
Voltammetric Determination of Ascorbic Acid in Pharmaceutical Formulations Using Modified Iodine-Coated Platinum Electrode
Authors: Amayreh Mohammad , Hourani Wafa , Hourani Mohammed Khair
Published: July 2021

Background: Despite the high reactivity of the platinum electrode, the iodine-coated platinum electrode shows obvious inertness toward adsorption and surface processes. For that, iodine-coated platinum electrodes accommodate themselves to interesting voltammetric applications. Objectives: This study reports using the modified iodine-coated polycrystalline platinum electrode as a voltammetric sensor for ascorbic acid determination in pharmaceutical formulations. Methods: The developed voltammetric method based on recording cyclic voltammograms of ascorbic acid at iodine-coated electrode The optimized experimental parameters for the determination of ascorbic acid were using 0.1 M KCl as a supporting electrolyte with a scan rate of 50mV/s. Results: The anodic peak related to ascorbic acid oxidation was centered at nearly 0.28V. An excellent and extended linear dependence of the oxidative peak current on the concentration of ascorbic acid was observed in the range 2.84x10-3 - 5.68 mM. The limit of detection (LOD) and limit of quantitation (LOQ) were 1.0 µM and 3.01 µM, respectively, attesting to the method’s sensitivity. The investigation for the effect of potential interference from multivitamin tablet ingredients (vitamins B1, B6, B12, folic acid, citric acid, sucrose, glucose, and zinc) indicated specific selectivity toward ascorbic acid and the absence of any electrochemical response toward these components. Recovery results in the range 98.93±2.78 - 99.98±5.20 for spiked standard ascorbic acid in pharmaceutical formulations further confirmed the potential applicability of the developed method for the determination of ascorbic acid in real samples. Conclusions: The developed method was successfully applied to the analysis of ascorbic acid (vitamin C), and the obtained results were in good agreement with the labeled values; besides, the statistical tests indicated no significant difference at p=0.05 with a 95% confidence level.
Business Climate Development Problems in a Depressed Region
Authors:   ITMO University, Zemskova A.K. , Hellstrom D.A. ,   ITMO University, Yanova E.A. ,   ITMO University, Kudinov I.A.
Published: July 2021

The Novgorod region has an exceptionally favorable geographical position, however, during the period of the general recession of the country's economy, the enterprises located in it turned out to be uncompetitive, sharply reducing their production. In modern conditions the most numerous sector of the economy are representatives of small and medium-sized businesses, which are targeted by programs of the Bank of Russia to support and stimulate their development. The Novgorod region created a municipal program for the development of this sector of the economy, which defines a set of various arrangements, the main goal of which is to provide absolute access to financial and other resources. In addition to these events, training activities are carried out, consisting in the provision of information seminars in various forms for representatives of this sector. The article presents an analysis of numerous problems in entrepreneurship development in the region of Novgorod, as well as specifies the theoretical aspects of changing the business climate. The justifications for necessary state support of small and medium-sized business subjects are highlighted. The research emphasizes two main problems of entrepreneurial activity: the socio-economic development of the Novgorod region and the development of small and medium-sized business subjects.
Advanced Manufacturing Technologies in Russia: Analysis of Retrospective Information in the Context of Management Tasks of Complex Socio-Economic Systems
Authors:   Saint Petersburg State University, Zuga E.I. , Gusev D.A. ,   Saint Petersburg State University, Kameneva A.A. ,   Saint Petersburg State University
Published: July 2021

The article is devoted to the study of system relations and trends of development of advanced production technologies in the Russian Federation from 2010 to 2018 on the basis of retrospective data, as well as approaches to its analysis. A review of relevant publications is made. As the result it is concluded that many problems of the development and implementation of innovative technologies have a system character and remain unresolved. Models of dynamics of individual indicators of innovation are investigated: the number of developed and used advanced production technologies (APT). In the period under study the positive reduction of the gap between the used and developed APTs, as well as higher growth rates of the latter are described. The results of modeling the dynamics of frequency distributions, median and modal values of indicators are presented. The similarity of the situations in the most regions of the country is revealed. But there are some exceptions – Moscow, St. Petersburg, Nizhny Novgorod region, where more favorable conditions are observed. The difference in the patterns of the growth rate of median and modal values is shown; the used APT is dominant for both indicators. An increase in the asymmetry of the APT development in the regions of the Russian Federation is found. The method of multiple rating revealed the subjects, the situation in which is more favorable in terms of the number of developed and used APTs, but there are no regions that are simultaneously leading in both indicators.
Patent Analysis and Prospects for the Development of an Automatic Shoe Lacing System
Authors:   ITMO University, Nikolaev A.S. , Belkov G.K. ,   ITMO University
Published: July 2021

This study examines the shoe powerlacing system. In the article are considered the history and the prerequisites of this innovation, various analogues and prototypes. By market analysis: the main models of shoes with a powerlacing system are reviewed, the leading companies and pioneer companies which have become the first in the production of equipment with an integrated powerlacing system are identified. The analysis of patent and non-patent sources is made. During patent analysis the main valid documents, which belong to the market leaders, are studied and a comparison to the first ever published patents for powerlacing system is fulfilled. The patent families of some companies and the main directions for the publication of patents are studied. The data is summarized, and possible predictions were made for the further development of this innovation. Several development vectors for companies that have sufficient potential in the current market are proposed. Also, due to the high level of development of intellectual property institution in countries it is proposed to use powerlacing system in such fields as space and military equipment. According to the authors, this invention could receive a fairly wide response in these areas due to the high interest of government and the great financial and investment potential in these industries.
Legal Basis of Biometric Methods of Identity Authentication
Authors:   Lipetsk State Technical University, Kuznetsov A.A.
Published: July 2021

The paper substantiates the need to form the legal foundations of biometric authentication methods. The development of modern society is connected with the protection of information and information security. Biometric authentication methods are of interest as an innovative technology, the use of which should have an appropriate legal basis. The implementation of the necessary software must be regulated by separate provisions of copyright law. The use of biometric parameters of a person must also be subject to legal acts. The separation of the two concepts of authentication and identification in the legal aspect is justified. This is due to the fact that the possibility of access to both personal data of the individual and their financial assets is affected, since the main sphere of use of biometric parameters is the receipt of public and banking services. The regulatory legal acts that determine the possibility of using biometric authentication methods are considered. The paper draws practical conclusions about the need to distinguish an independent legal category of biometric personal data in the Russian legislation. To fix that the information about the subject of personal data will be attributed to biometric identification parameters if it is used for the purpose of establishing identity.
Emulators as a Tool for Control Digital System Software Debugging
Authors:   Institute for Design Problems in Microelectronics of Russian Academy of Sciences, Moscow, Russian Federation, Ivannikov A. D.
Published: July 2021

The simulation of control digital systems at the architecture level, that is, emulation of the instruction set, memory cells and internal programmable registers, as well as the interrupt system and direct memory access is considered. Emulators are used for debugging embedded digital system software and in the development of new custom processors. Requirements for emulators are formalized. It is shown that the main requirements are adequate simulation of digital systems at the architecture level, the presence of a set of convenient debugging modes, as well as high efficiency of emulators, that is, the minimum possible average number of instrumental computer instructions required to simulate one instruction of the target digital system. A classification of the debugging capabilities of emulators and possible ways of implementing debugging modes is given. The composition of the emulators is described. A graphical model of the structure of the emulator is proposed. The simulation process for each instruction is presented as a sequence of execution of smaller operations. If different instructions include the same operations, these operations can be performed by the same software modules. These modules can be included in all the corresponding blocks of the emulator that simulate the execution of instructions, or the emulator can include only one copy of each operational program module, and the module can be accessed while simulating the corresponding instruction. Determination of the structure of the emulator is formalized as an extreme task, the objective function of which is the minimum average time for simulating the execution of one instruction of the target digital system, and the limitation is the maximum allowable memory size of the instrumental computer occupied by the emulator. A practical method for determining the structure of the emulator is proposed.
A Method of Training Technical Condition Monitoring Systems in Construction
Authors:   Moscow State University of Civil Engineering, Moscow, Russian Federation, Kats V. A. , Volkov A. A. ,   Moscow State University of Civil Engineering, Moscow, Russian Federation
Published: July 2021

Technical condition estimation of the constructions is a relevant problem. In order to acquire comprehensive information of the testing object monitoring should be complex, providing effective and accurate estimate of the hazard class of the defects and forecasting its failure. Most of the current monitoring systems are based on acquiring and handling diagnostic via acoustic emission (AE) method. However, importantly, parameters of the acoustic emission propagated by defects depend on multiple factors such as type of the defect and its origin and the presence of noise on the testing object during data acquisition. In this regard, the problem of training the technical condition monitoring system is particularly important. In current work, we proposed a training method of monitoring systems for technical diagnostics of the constructions based on four subsequent stages: features extraction from AE data on two-time scales, features' dimensionality reduction, outliers detection and anomalies detection. Proposed method provides trained model for the detection of defects evolution in the building constructions. It has been tested on real constructions of the oil reservoir. The verification of the proposed method was provided by estimation of the accuracy metric of the trained model. Based on cross-validation, the mean error was 1.4 %. This confirms that proposed method can be effectively utilized as a part of technical condition monitoring system for more accurate forecasting hazard class of the defects and their evolution inside constructions.
Formation of Hybrid Computational Structure for the Analysis of Critical Control Scenarios in Biocybernetics
Authors:   St. Petersburg Federal Research Center of the Russian Academy of Sciences, Perevaryukha A. Y.
Published: July 2021

We have considered methods of computational modeling of rapid processes in ecosystems and events of changes with extreme amplitude of abundance. For biocybernetics, the phenomena of degradation of the commercial population in the form of a sudden collapse for specialists and an explosive increase in the number of a new species after invasion — outbreaks are of the type predicted with difficulties. We have developed and ecologically substantiated a method for modeling a group of rapid phenomena, including the calculation of threshold states and transient modes. Algorithmically implemented computational structure, which describes spontaneous modes of rapid transformations in ecodynamics based on the internal properties of biosystems. New model is based on the formalization of threshold effects in regulation of reproduction, included as additional functionals in the basic hybrid structure for research in scenario experiments. Computational scenario is obtained for a generalized description of the extreme population process. We have considered the situation of the collapse of the commercial population with a quota-regulated harvest on the example of the king crab Paralithodes camtschaticus near the coast of Alaska. In the simulation scenario of the crab collapse, we took into account the logic of expert management of the level of exploitation of biological resources. The resulting control scenarios using the iterative model use bifurcations and the loss of the invariance property by the attractor. Modeling with the expert logic of fishery management revealed the characteristic signs of the dynamics of crab collapse and predicted important stages in the process of degradation of exploited biological resources.
Angular Rate Sensor Based on a Solid-State Wave Gyroscope with a Metal Resonator for Attitude Control, Stabilization and Navigation Systems
Authors: Raspopov V. Ya. , Likhosherst V. V.
Published: July 2021

The article describes the methods and test results of a solid-wave gyroscope (SVG) — an angular rate sensor (ARS), developed at the Department of Control Devices, Tula State University and manufactured by the serial plant of JSC "Michurinsky Plant" Progress "according to the technology it worked out. The metal resonator SVG-ARS is made of an elinvar alloy and has a cylindrical structure of different thickness, the lower part of which, with a smaller wall thickness, acts as a suspension for the upper cylinder, the resonator itself, which has a conical shape, providing better vibration localization at its end edge. Technological manufacturing defects, different frequencies and variability, are eliminated by balancing " by mass" based on the removal of excess metal at certain points on the end edge of the resonator. The electronic module provides the second mode of primary and secondary oscillations of the resonator edge arising during rotation and creates a signal to compensate for the Coriolis and quadrature components of the output signal at the nodes. The maximum amplitudes of the excitation and compensation signals do not exceed 10 V. Therefore, at large values of mechanical influences, the compensation circuit may not work out the increased signal and the SVG-ARS loses its operability. The total processing time of the compensation signal does not exceed 1 μs. The maximum power consumption of the electronic module is not more than 4 W. When testing for mechanical and temperature effects, the norms were used that are typical for similar devices (angular rate sensors) used on board aircraft. The tests were carried out on the bench equipment of a specialized enterprise. The stability of the zero signal and the scale factor was determined under the simultaneous action of the measured speed and temperature on the SVG-ARS. The values of the random walk and the instability of the zero signal were obtained from the Allan deviation plots. Their values provide a basis for the conclusion about the possibility of using the developed SVG for several hours on board dynamic aircraft in orientation, stabilization and navigation systems. It was found that SVG-ARS possesses impact strength and restores its measuring ability after impact. Tests for vibration resistance revealed resonance frequencies and frequency rangesin which the tested VTG-DUS sample can be used without significant modification. The results of vibration tests can be used to refine the design and control electronics for the operating conditions of a particular aircraft.
Astrometric and photometric observations of six brightest trans-Neptunian objects at the Kyiv comet station
Authors:   Astronomical Observatory of Taras Shevchenko National University of Kyiv, Kyiv, Ukraine, Baransky A. , Lukina O. ,   Taras Shevchenko National University of Kyiv, Kyiv, Ukraine, Borysenko S. ,   Main Astronomical Observatory of the NAS of Ukraine, Kyiv, Ukraine
Published: July 2021

In this work we focused on observations of six trans-Neptunian objects (TNOs) whose apparent magnitudes are brighter than 20m. We present the results of astrometric and photometric observations of (134340) Pluto, (136108) Haumea, (136472) Makemake, (136199) Eris, (90482) Orcus, and (20000) Varuna obtained at the Kyiv comet station (Code MPC 585) in 2017-2019. For observations we used the 0.7-m (f/4) reflector AZT-8 with FLI PL4710 CCD camera and filters of Johnson-Cousins photometric system. From our images we measured the objects' astrometric positions, calculated apparent magnitudes in the BVRI (mostly R) bands using aperture photometry method, and found absolute magnitudes together with the colour indices in several bands. Analysing our results, we investigate the limitation on the astrometry and photometry of faint objects with the 0.7-m telescope.
Geomagnetic storms and their impacts on Ethiopian power grid
Authors:   Mekelle University, Department of Physics, Mekelle, Ethiopia, Abraha Gebregiorgis , Yemane Tesfay ,   Ethiopian Space Science and Technology Institute, Addis Ababa, Ethiopia, Kassa Tsegaye ,   Bahir Dar University, College of Science, Department of Physics, Bahir Dar, Ethiopia
Published: July 2021

In present work we analysed eight geomagnetic storm events in 2015/2016 and studied the possible influence of these events on Ethiopian power grids. The results showed that the majority of the forced power outages occurred in the period of the main phase of events and the recovery period of the geomagnetic storms. The geomagnetic storms are characterised by different indices and parameters such as the disturbance storm time (Dst) values, coronal mass ejection (CME) speed, solar wind speed (V sw) and interplanetary magnetic field (IMF-Bz) on the selected dates. In most cases the observed geomagnetic storms were produced by the CME-driven storms as they show a storm sudden commencement (SSCs) before the main storms, and also have the short recovery periods. The sudden jumps of the solar wind velocities and IMF-Bz are also consistent with occurrence of the CMEs. Moreover, this effect can be traced in changes of Earth magnetic field during geomagnetic storm and quiet days. The observed CME-driven storms can produce highly variable magnetic fields on the transformers and provide forced outages, however the studied outages have not been recognised as those one driven by a geomagnetic storm.
Examining Instructors’ Roles in Facilitating Students’ Learning Process in Pedagogical Information and Communication Technology Massive Open Online Course
Authors: Singh A. , Engeness I.
Published: July 2021

This study examines how course instructors facilitate students’ learning in the Pedagogical Information and Communication Technology (ICTPED) Massive Open Online Course (MOOC) aiming to develop professional digital competence in pre-service and in-service teachers in Norway. It also provides an insight into how students’ agentic engagement in learning may affect the course instructors’ guidance. Students’ online meetings with the course instructors and students were observed and recorded. The meetings aimed to develop students’ understanding of the examination assignment. The data (4.5 hours video recordings) analyzed by the method of interaction analysis revealed that the instructors performed four pedagogical functions: (1) setting up the learning process, (2) reifying students’ ideas;(3) assisting students in developing their conceptual understanding; and (4) summarizing and structuring students’ understanding about target concepts. These pedagogical functions evolved out of mutual collaboration of the instructors and students. The students’ agentic engagement in learning was visible when they took the initiative to explicitly share their ideas related to their examination assignment. Instructors’ agency in guiding came into play when addressing students’ ideas and questions emerged during the interaction process. Students’ agentic engagement in learning shaped the course instructors’ pedagogical functions and enhanced their agency. In doing so, the dialectical interplay between the students’ and course instructors’ agency comes to the fore as an essential aspect of learning and teaching in online environments.
Measuring Higher-Order Cognitive Skills in Collective Interactions with Computer Game
Authors: Margolis A.A. , Gavrilova E.V. , Kuravsky L.S. , Shepeleva E.A. , Voitov V.K. , Ermakov S.S. , Dumin P.N.
Published: July 2021

The present study is focused on testing the computer game system ‘PL-modified’ as a diagnostic tool for measurement of higher-order cognitive skills by middle-school students in individual and collaborative game. The ‘PL-modified’ is a computer system designed as a game which implies a set of concrete parameters specially elaborated for assessment of the cognitive actions of analysis, planning, and reflection — the basic higher-order cognitive functions which determine high achievements in school education according to the Russian theory of developmental education. 189 middle-school students at the age of 11—12 years participated in this study. Two research questions were asked: 1) whether the cognitive actions of analysis, planning, and reflection measured by special markers of the computer game system performance are correlated with each other as a valid indicator for the new constructed diagnostic instrument; 2) which type of the game — individual or collaborative — provides better conditions for manifestation of the above mentioned higher mental actions. Abstract intelligence as an additional anticipated factor for high game performance was also assessed and controlled. It was revealed that participants exhibit the higher level of the cognitive actions of analysis and planning in collaborative game. At the same time the patterns of the interactions between the researched variables as well as distinct parameters of game performance are determined by the concrete level of intelligence which rather varies in different pairs of collaborators. We discuss our results from the position of the further prospects for the application of the ‘Pl-modified’ computer system as a potential instrument of measurement and development of higher-order thinking actions. In terms of the modern educational programs teachers need simple diagnostic tools for measurement of school-children’s thinking development. Traditional ‘pen-and-paper’ techniques become quickly outdated as much as they may not be sufficiently motivationally attractive for children and focus only on the result of the thinking process. In this regard, such diagnostic instrument formed in the format of a computer game and centered on the whole gaming process allows fixing children’s actions and provides important information on the dynamic characteristics of their mental process.
Playing with Social Roles in Online Sessions for Preschoolers
Authors: Solovieva Y. , Quintanar L.
Published: July 2021

Educational isolation, as a consequence of the global pandemic, has become an obstacle for guiding activity of pre-school age for a period of over one year. Online education did not include collective playing activity; actually, simultaneous modality of sessions was not at all applied in many public and private pre-school institutions in Latin America. The goal of the article is to show a unique experience of organizing collective sessions of playing with social roles by a preschool institution in Mexico. The results show the necessity of modification of some of the elements of the structure of playing activity, such as the means and the orientation of the activity. A broad variety of means at concrete, perceptive and verbal level were used for online playing. The part of orientation of action was separated from the part of realization of playing to guarantee the process of collective playing. The favorable and negative aspects of organization of online playing activity with social roles are discussed. The conclusions claim for the necessity of profound analysis of online modality of education for psychological development together with urgent re-conceptualization of the content of pre-school period as a period of affective communication and preparation for studying at school.
The Adolescent at the Center of Activity Systems in the Context of COVID-19: Redefining Routines and Relationships at the Heart of Learning
Authors: Barma S. , Deslandes R. , Ste-Marie N.
Published: July 2021

In March 2020, teenagers in Quebec, Canada suddenly faced with a challenge related to the way their learning activity was mediated following the closure of schools due to the COVID-19 pandemic. Studies reporting the effects of human disasters and confinement in young people are limited. This study identifies the tensions experienced by 1057 adolescents as they redefine their relationship to family life, learning and school: mediation tools to their learning activities, spatiotemporal redefinition of their activities, modification of relationships with significant adults for them. Two theoretical frameworks are combined: the overlapping spheres of influence model and cultural historical activity theory. A questionnaire was sent online on an opensource survey software. The results present the demographic characteristics of the adolescents’ participants and their family, their general state of mind and daily routines adjustments at school and at home, and their perceptions with regards to their relations to their peers, teachers and their parents’ support. Findings pinpoint the tensions related to loss in the activity systems of adolescents as their school activity is challenged by the pandemic and proposes avenues to put in place a boundary zone to support the adolescent.
Changing the World for Children with Complex Feeding Difficulties: Cultural-Historical Analyses of Transformative Agency
Authors: Hopwood N. , Elliot C. , Pointon K.
Published: July 2021

How to bring about positive change is a key concern in cultural-historical theory. There is an urgent imperative to address questions of transformation at the nexus of the individual and the social. One way to approach this is through the concept of agency, the means through which people go beyond coping with problems or adapting to the status quo, instead striving to make the future that ought to be a reality. This paper takes up ideas from Stetsenko’s transformative activist stance (TAS), Sannino’s transformative agency by double stimulation (TADS), and Edwards’ relational agency, tracing the emergence and enactment of agency among parents of children with complex feeding difficulties. These children were unable to eat orally, instead using a tube to feed. Each family strived towards, and realised, futures where their child was able to feed orally, without a tube. Parents acted agentically in ways that were contingent upon relevant cultural tools. Such tools are key to futures that are more inclusive, equitable and nurturing for all children and their families. The paper highlights the value of contemporary cultural-historical approaches to agency in understanding and provoking transformation at the nexus of the individual and social.
Paleotsunamis on the Southern Hikurangi Subduction Zone, New Zealand, Show Regular Recurrence of Large Subduction Earthquakes
Authors: Pizer Charlotte , Clark Kate , Howarth Jamie , Garrett Ed , Wang Xiaoming , Rhoades David , Woodroffe Sarah
Published: July 2021

Geological records of subduction earthquakes, essential for seismic and tsunami hazard assessment, are difficult to obtain at transitional plate boundaries, because upper-plate fault earthquake deformation can mask the subduction zone signal. Here, we examine unusual shell layers within a paleolagoon at Lake Grassmere, at the transition zone between the Hikurangi subduction zone and the Marlborough fault system. Based on biostratigraphic and sedimentological analyses, we interpret the shell layers as tsunami deposits. These are dated at 2145–1837 and 1505–1283 yr B.P., and the most likely source of these tsunamis was ruptures of the southern Hikurangi subduction interface. Identification of these two large earthquakes brings the total record of southern Hikurangi subduction earthquakes to four in the past 2000 yr. For the first time, it is possible to obtain a geologically constrained recurrence interval for the southern Hikurangi subduction zone. We calculate a recurrence interval of 500 yr (335–655 yr, 95% confidence interval) and a coefficient of variation of 0.27 (0.0–0.47, 95% confidence interval). The probability of a large subduction earthquake on the southern Hikurangi subduction zone is 26% within the next 50 yr. We find no consistent temporal relationship between subduction earthquakes and large earthquakes on upper-plate faults.