bluuebunny/crossref_metadata_2025 huggingface dataset:
University Language Instructors’ Preparedness for Technology-Mediated Instruction and Burnout During the COVID-19 Pandemic
Authors: Izquierdo Jesús , Sandoval Caraveo María del Carmen , De la Cruz Villegas Verónika , Zapata Díaz Rubén
Published: October 2021

This quantitative study explored the preparedness of foreign language teachers for technology-mediated instruction and the burnout conditions that characterized their transition from in-person to off-campus second/foreign language education during the covid-19 pandemic. The data were collected from 104 university instructors through a Google Forms® survey and a burnout questionnaire in a Mexican state which was severely hit by the virus in the spring of 2020. The survey elicited information about institutional conditions, teacher education and technology access and use. The burnout questionnaire explored exhaustion, depersonalization and accomplishment during off-campus technology-mediated language instruction. Both survey and questionnaire answers were subject to frequency analyses. In terms of teacher preparedness, data analyses revealed that the participants had a large number of teaching hours; they held sustained computer/Internet access but lacked technology-assisted language teaching training; thus, they independently sought out technological resources for the delivery of their lessons. With regard to burnout, data analyses indicated that many participants experienced exhaustion due to work overload, use of technology, and its proper integration in the lessons. Nonetheless, the use of technology helped them maintain interest in their learners, feel satisfaction and accomplish academic aims.
Pedagogical Strategies Used by English Teacher Educators to Overcome the Challenges Posed by Emergency Remote Teaching During the COVID-19 Pandemic
Authors: Castañeda-Trujillo Jairo Enrique , Jaime Osorio María Fernanda
Published: October 2021

The crisis in the education system generated by the appearance of covid-19 revealed the multiple gaps that exist due to the diversity of contexts to which students and teachers belong. This article reports on a case study which explored the challenges English teacher educators (tes) at a public university in Neiva, Colombia faced during the pandemic due to the imposition of emergency remote teaching (ert), the pedagogical strategies they used to respond to these challenges, and the ones that remain. To do this, data were collected from a questionnaire and a focus group with tes and pre-service teachers (psts) from the language teacher education program. The main findings show that the transition from classroom teaching to ert brought some challenges for tes and their trainees related to the social realities existing in the context of the latter. To respond to these challenges, tes had to adjust their teaching strategies and learn to use some technologies such as videoconferencing software and educational apps. Still some challenges remain for the future, such as enhancing pst’s motivation, autonomy and classroom interaction. The study suggests the need to continue training language tes on the use of ert technologies and to find more and better ways to promote autonomous learning processes to adapt teaching practices to current times.
Gliptins vs. Milk-derived Dipeptidyl-Peptidase IV Inhibiting Biopeptides: Physicochemical Characterization and Pharmacokinetic Profiling
Authors: Barrero Jorge Andrés , Cabrera Fabio , Cruz Claudia Marcela
Published: October 2021

Background: Milk-derived biopeptides have reported in vitro dipeptidyl-peptidase IV (DPP-IV) inhibition, suggesting a glycemic-regulatory effect in Type 2 Diabetes Mellitus (T2DM). Nonetheless, the therapeutic application of these nutraceuticals is limited by the scarcity of knowledge regarding their pharmacokinetic profile. Objective: This study aimed to characterize and assess the pharmacokinetics of milk-derived biopeptides. Through an in silico comparative analysis with gliptins, we expected to identify enhanced properties in food-hydrolysates and suitable DPP-IV inhibiting peptides as candidates for T2DM therapy. Methods: A comparison between gliptins and biopeptides was conducted based on in silico evaluation of drug-likeness, physicochemical properties, pharmacokinetics, and synthetic accessibility. Suitable target proteins for gastrointestinal-absorbable biopeptides were determined as well. Data collection was performed on SwissADME, ADMETlab, DrugBank, SwissTargetPrediction, ChemDes, and BIOPEP-UWM platforms. Statistical analysis was carried out using a one-way ANOVA test. Results: Drug-likeness compliance showed no significant difference between gliptins and biopeptides (p>0.05) in three out of nine assessed rules, though gastrointestinal-absorbable biopeptides exhibited no significant difference with gliptins in five drug-likeness guidelines. The physicochemical evaluation revealed a significant difference (p<0.05) between both groups, with peptides exhibiting enhanced solubility, flexibility, and polarity. Nine out of thirty-six assessed biopeptides reported being likely gastrointestinal-absorbable molecules, from which six displayed ≥30% predicted bioavailability, two reported CYP450 interactions, and all were determined to be blood confined. Biopeptides showed a slightly lower clearance than gliptins yet counteracted by a significantly lower half-life. Moreover, synthetic accessibility scores indicated higher synthetic ease for biopeptides. In addition, absorbable bioactive peptides reported a considerable binding affinity to DPP-IV and Calpain-I. Conclusions: Compared to gliptins, gastrointestinal-absorbable biopeptides exhibit superior physicochemical properties (higher solubility, flexibility, and polarity), lesser CYP450 interactions, higher synthetic ease, and some reported an important affinity for DPP-IV and Calpain-I. Only a small fraction of milk-derived biopeptides are suitable drug-like compounds and feasible candidates for T2DM therapy; yet, testing their therapeutic potency remains subject to further studies.
Supporting Black, Indigenous, and People of Color Counselors: Considerations for Counselor Skills Training and Practice
Authors: Branco Susan F. , Jones Connie T.
Published: October 2021

Black, Indigenous, and people of color (BIPOC) counselors require training, practice, and consultation strategies to address client-initiated microaggressions and racism in counseling. Utilizing critical race theory in counselor education, the authors offer a counseling skills model, based on Sue et al.’s microintervention concept, to support BIPOC counselor training and supervision. The authors describe strategies all counselors may use to address microaggressions and racism in counseling sessions with relevant ethical considerations. Implications for mental health counselors, counselor educators, and clinical supervisors are provided.
The Influence of Anxiety on Response to Negative Sentiment Override Assessment Protocols During Couples Counseling
Authors: Olson Seth , Chesnut Steven R. , DeCino Daniel A.
Published: October 2021

Negative sentiment override (NSO), or messages and experiences interpreted in an increasingly negative manner, is one way to explain dissatisfaction in romantic relationships. In addition, psychological factors, like anxiety, have been shown to increase levels of dissatisfaction. In the current study, we examined the extent that significant anxiety, determined by responses to the Symptom Checklist–90, influenced the endorsement of items on Gottman’s NSO scale. We examined the item characteristic curves (ICCs) of the individual items on Gottman’s NSO scale and then tested for differential item functioning between those with significant anxiety and those without significant anxiety for a sample of 262 individuals seeking counseling. Our results demonstrate different ICC patterns between those with anxiety and those without. More specifically, individuals with anxiety reported elevated NSO compared to individuals without anxiety. Implications of these findings are discussed.
NAT2 and CYP1B1 genetic polymorphisms in patients with genital endometriosis depending on tolerability of melatonin
Authors: Ivashchenko Tatyana E. , Yarmolinskaya Maria I. , Tkhazaplizheva Saimat S.
Published: October 2021

BACKGROUND: Genital endometriosis is one of the most pressing problems of modern gynecology. Melatonin is a promising drug with a potentially curative effect on endometriosis.
AIM: The aim of this study was to conduct a comparative analysis of the genetic polymorphism of some genes encoding enzymes involved in melatonin metabolism.
MATERIALS AND METHODS: The genetic polymorphism in the NAT2 and CYP1B1 genes encoding enzymes involved in melatonin metabolism in patients with different tolerance to this drug was analyzed by PCR-RFLP analysis.
RESULTS: In patients with genital endometriosis, the presence of a wild-type allele (N) of the NAT2 gene was associated with poor tolerance of melatonin. The NAT2 (N / N) rapid acetylator phenotype combined with the low catalytic activity of CYP1B1 (C / C) occurred more frequently in endometriosis patients having poor melatonin tolerability compared to the group of patients who tolerated the therapy well.
CONCLUSIONS: For patients with genital endometriosis with the wild-type (N) allele of the NAT2 gene, melatonin administration is inappropriate due to numerous side effects during the drug use.
Modern sonographic markers for the prognosis of preterm birth in women with different somatotypes
Authors: Tomaeva Kristina G. , Gaidukov Sergey N. , Komissarova Elena N. , Tomaev Georgii G,
Published: October 2021

BACKGROUND:Preterm birth is one of the causes of perinatal morbidity and mortality. Premature infants have an increased risk of death and the development of neurological and other disorders.
AIM:The aim of this study was to evaluate the modern sonographic parameters of the cervix in pregnant women with different somatotypes and to develop a mathematical model for predicting preterm birth.
MATERIALS AND METHODS:The study included 390 women, among whom 110 were classified with macrosomatic, 173 with mesosomatic, and 107 with microsomatic types. Somatotype was determined in women in early stages of pregnancy (before 9-10 weeks of gestation) using the R.N. Dorokhov anthropometric test method. The utero-cervical angle was measured, shear wave elastography was performed, and the average shear wave speed in the area of the internal cervical os was determined. All measurements were performed on a Philips EPIQ 5 ultrasound machine.
RESULTS:Preterm birth was more often identified in women with macro- and microsomatic types in comparison with women with mesosomatic type (p 0.05). In pregnant women with subsequent preterm birth at 22-23 weeks, the average SWS in the area of the internal cervical os was reduced (p 0.05) and the utero-cervical angle was higher in comparison with those women who did not have preterm birth (p 0.05). Using multiple regression analysis, we obtained the regression equation (formula), which predicts the development of preterm birth in women with different somatotypes.
CONCLUSIONS:Such parameters as the average shear wave speed in the area of the internal cervical os and the utero-cervical angle may be regarded as markers of preterm birth. The mathematical formula obtained allows for predicting the development of preterm birth in women with different somatotypes and for timely prevention of pathology.
Pregnancy in a woman with secondary osteoporosis. A case report
Authors: Sokolova Alena A. , Kuznetsova Lubov V. , Khadzhieva Ellerina D.
Published: October 2021

BACKGROUND: Glucocorticoid-induced osteoporosis is one of the most serious complications of prolonged (more than three months) systemic glucocorticoid therapy. Rapid bone loss occurs in the first months of treatment, which is a significant risk factor, especially during pregnancy and lactation. When taking systemic glucocorticoid therapy in a daily dose of 5 mg or more (in prednisone equivalent), the relative risk of vertebral fractures increases by 2.9 times.
RESULTS: This article examines a clinical case of pregnancy and childbirth of 32-year-old woman diagnosed with secondary complicated osteoporosis during treatment with systemic glucocorticosteroids, who has a history of spine compression fractures during lactation after a previous pregnancy. Vitamin D deficiency was diagnosed and corrected during this pregnancy, which minimized the risk of fractures. A baby was delivered through the birth canal. Bisphosphonate therapy was started six months after birth. No new fractures were diagnosed within two years of observation.
CONCLUSIONS: The approach to the management, diagnosis and delivery of pregnant patients with secondary osteoporosis treated long-term with glucocorticosteroids should be multidisciplinary. It is imperative to prescribe vitamin D and calcium preparations throughout pregnancy and lactation.
IVF efficiency in different phenotypes of polycystic ovary syndrome
Authors: Nikolayenkov Igor P. , Kazymova Olga E. , Sudakov Dmitry S. , Dymarskaya Yulia R.
Published: October 2021

Polycystic ovary syndrome occupies a leading place in the structure of endocrine infertility. This article presents the endocrine and metabolic features of the polycystic ovary syndrome phenotypes, as well as modern concepts of efficiency and complications of the use of assisted reproductive technologies, depending on the specific phenotype. The issues of polycystic ovary syndrome influence on selecting the method of assisted reproductive technologies, as well as possible complications that occur during in vitro fertilization and the features of the pregnancy course remain unresolved. The individualization of the approach seems to be promising when taking into account the differences in the hormonal profile and the features of metabolic disorders in each polycystic ovary syndrome phenotype. That may allow us to take one more step towards improving the effectiveness of in vitro fertilization and reducing the frequency of complications in patients with polycystic ovary syndrome.
Vitamin D receptor gene polymorphism in women with genital endometriosis, type 1 diabetes mellitus, and in the population
Authors: Denisova Aleksandra , Ivaschenko Tatyana E. , Yarmolinskaya Maria I. , Shagina Аnnа A. , Misharina Elena V.
Published: October 2021

AIM: The aim of this study was to analyze the association between the vitamin D receptor gene polymorphism and the risk of developing genital endometriosis and type 1 diabetes mellitus.
MATERIALS AND METHODS: The frequency of allelic variants of the VDR gene was studied by PCR-RFLP analysis in 282 women, including 129 patients with genital endometriosis (stages IIV), 71 patients with type 1 diabetes mellitus, and 82 women of the control group represented by the population sample.
RESULTS: It was found that the frequency of the allele G polymorphic variant of rs1544410 (BsmI) in the VDR gene was significantly higher in the group of patients with genital endometriosis compared to the population sample (p = 0.048). Significant differences for the G / G genotype in patients with genital endometriosis relative to the control group (p 0.05) and the group of patients with type 1 diabetes mellitus (p 0.05) were revealed. According to the odds ratio, the risk of developing genital endometriosis was 1.9 times higher for this genotype (OR = 1.93 CI = 1.0823.450; OR = 1.892 CI = 1.0223.430). The combination of the A / A and G / A genotypes was significantly more common in patients with type 1 diabetes mellitus (p = 0.040) and in the population (p = 0.025), when compared to the patients with genital endometriosis. A significant increase in the t allele of the rs731236 polymorphism (TaqI) of the VDR gene was found in the group of patients with type 1 diabetes mellitus (p 0.05). The combination of the T / t and t / t genotypes of the rs731236 polymorphism (TaqI) of the VDR gene in patients with type 1 diabetes mellitus were significantly more common than in the group of patients with genital endometriosis (p = 0.017).
CONCLUSIONS: The data obtained may be important for risk assessment of genital endometriosis and type 1 diabetes mellitus development and for developing new strategies for the prevention and treatment of these diseases.
HEAD ON HALL EFFECT SENSOR ARRANGEMENT FOR DISPLACEMENT MEASUREMENT
Authors:   Technical University of Kosice, Faculty of Mechanical Engineering, Slovakia, KELEMEN MICHAL , KELEMENOVA TATIANA ,   Technical University of Kosice, Faculty of Mechanical Engineering, Slovakia, VARGA MARTIN ,   Technical University of Kosice, Faculty of Mechanical Engineering, Slovakia, SINCAK PETER JAN ,   Technical University of Kosice, Faculty of Mechanical Engineering, Slovakia, LESTACH LUKAS ,   Technical University of Kosice, Faculty of Mechanical Engineering, Slovakia, SERGEEVNA BAYMETOVA ELENA ,   Federal State Budget Educational Institution of Higher Education "Kalashnikov Izhevsk State Technical University", Russia, RAVILEVNA KOROLEVA MARIA ,   Federal State Budgetary Scientific Institution "Udmurt Federal Research Center of the Ural Branch of the Russian Academy of Sciences, ALEKSEEVNA CHERNOVA ALENA ,   Federal State Budget Educational Institution of Higher Education "Kalashnikov Izhevsk State Technical University", Russia
Published: October 2021

Hall effect sensor is a very frequently used sensor in mechatronic products. There is little information in the catalogue sheets about the application possibilities of this type of sensor. This article examines the configuration options of this sensor and how to use it to achieve the best measurement uncertainty and minimal hysteresis.
OPTIMIZATION OF THE DEVELOPED OUTER SURFACE OF AN INDUSTRIAL OIL COOLER
Authors:   Federal State Budget Educational Institution of Higher Education ", SERGEEVNA BAYMETOVA ELENA ,   Kalashnikov Izhevsk State Technical University",   , Russia, RAVILEVNA KOROLEVA MARIA ,   Federal State Budgetary Scientific Institution "Udmurt Federal Research Center of the Ural Branch of the Russian Academy of Sciences", Russia, ALEKSEEVNA CHERNOVA ALENA ,   Federal State Budget Educational Institution of Higher Education "Kalashnikov Izhevsk State Technical University", Russia, KELEMEN MICHAL ,   Technical University of Kosice, Faculty of Mechanical Engineering, Department of Mechatronics, Slovakia
Published: October 2021

Heat removal from the working liquid of hydraulic systems requires the use of heat exchange devices - oil coolers with their geometry directly affecting their efficiency. This paper considers the issues of statement and implementation of the numerical experiment to solve the optimization problem for the industrial oil design.
QUALIMETRIC METHOD OF ASSESSING RISKS OF LOW QUALITY PRODUCTS
Authors:   Ukrainian Engineering Pedagogics Academy, Kharkiv, Ukraine, TRISHCH ROMAN , NECHUIVITER OLESIA ,   Ukrainian Engineering Pedagogics Academy, Kharkiv, Ukraine, DYADYURA KOSTIANTYN ,   Sumy State University, Faculty of Technical Systems and Energy Efficient Technologies, Sumy, Ukraine, VASILEVSKYI OLEKSANDR ,   Vinnytsia National Technical University, Vinnytsia, Ukraine, TSYKHANOVSKA IRYNA ,   Ukrainian Engineering Pedagogics Academy, Kharkiv, Ukraine, YAKOVLEV MAKSYM ,   National academy of the National guard of Ukraine
Published: October 2021

Risk assessment is an integral part of an enterprise's quality management system. The risk of low quality products is the most significant risk, as it is directly related to the concept of enterprise competitiveness. The paper analyzes the scientific papers related to the assessment of the quality of products, processes and services, their disadvantages, possible limits of application. It is proposed to use mathematical dependences to obtain estimates of product quality indicators on a dimensionless scale. Knowing the density function of random variables of product quality indicators and knowing the mathematical dependence of their estimates on a dimensionless scale, it is proposed to obtain the density function of estimates. Knowing the function of the density of estimates of quality indicators, it is proposed to find the probabilities of risks of the assessment of quality indicators in any given interval on a dimensionless scale. A method for assessing the risks of low quality products has been developed
DEVICE FOR MONITORING THE INFLUENCE OF ENVIRONMENTAL WORK CONDITIONS ON HUMAN FACTOR
Authors:   Technical University of Kosice, Faculty of Mechanical Engineering, Institute of Special Engineering Processologies, Department of Safety and Production Quality, Kosice, Slovakia, ONOFREJOVA DANIELA , KADAROVA JAROSLAVA ,   Technical University of Kosice, Faculty of Mechanical Engineering, Institute of Management, Industrial and Digital Engineering, Kosice, Slovakia, JANEKOVA JAROSLAVA ,   Technical University of Kosice, Faculty of Mechanical Engineering, Institute of Management, Industrial and Digital Engineering, Kosice, Slovakia
Published: October 2021

Industry 5.0 follows the idea of continuous digitization and transfer to digital factory. Industries must adopt the green and digital transitions to continue to be competitive. Besides the preservation of resources, climate change, the social stability is in the focus. Industries strive to become more resilient against external disturbances, such as Covid-19 crisis. Work environment considerably affects the productivity, health and safety of workers. Monitoring of the working environment with reliable miniaturized technology can guarantee suitable working conditions. In the line with the EU Strategic Framework on Health and Safety at Work 2014-2020, one of EU-OSHA's priorities is to fortify the prevention of work-related diseases.
MAXIMIZING THE PROFITABILITY ON INVESTMENT BY OPTIMIZING THE PRODUCTION PROGRAM
Authors:   Technical University of Kosice, Mechanical Engineering, Institute of Management, Industrial and Digital Engineering, Kosice, Slovakia, KADAROVA JAROSLAVA , JANEKOVA JAROSLAVA ,   Technical University of Kosice, Mechanical Engineering, Institute of Management, Industrial and Digital Engineering, Kosice, Slovakia, ONOFREJOVA DANIELA ,   Technical University of Kosice, Mechanical Engineering, Institute of Special Engineering Processologies, Department of Safety and Production Quality, Kosice, Slovakia
Published: October 2021

Investments in tangible fixed assets significantly affect the future production capacity of the company, they are a stimulator of the company's development. At the same time, they are associated with a degree of uncertainty that needs to be taken into account when making investment decisions. The article presents an approach to optimizing inhomogeneous production in order to maximize the economic efficiency of a particular business investment. The economic efficiency of the investment is assessed comprehensively in terms of profitability, liquidity and risk. The risk is addressed through Monte Carlo simulation and the production program is optimized using OptQuest. The result is a production program that maximizes the return on the assessed corporate investment.
TREND FORECAST FOR SHORT-TERM OF SHOCK-VIBRATION PREDICTION
Authors:   Technical University of Kosice, Faculty of Manufacturing Technologies with a Seat in Presov, Department of Technical Systems Design and Monitoring, Slovakia, KRENICKY TIBOR , NAHORNYI VOLODYMYR ,   Sumy State University, Department of Computer Science, Faculty of Electronics and Information Technologies, Sumy, Ukraine
Published: October 2021

The short-term forecasting of vibration is considered, in which the trend of the gravitational constant is used as the initial data for forecasting. The trend is recorded throughout the entire period of maturation of the vibration at points on the earth's surface far from its epicenter.
EFFICIENT DETERMINATION OF STABILITY LOBE DIAGRAMS DEPLOYING AN AUTOMATED, DATA-BASED ONLINE NC PROGRAM ADAPTION
Authors:   Laboratory for Machine Tools and Production Engineering (WZL) of RWTH Aachen University, Germany, BRECHER CHRISTIAN , KLIMASCHKA RALPH ,   Laboratory for Machine Tools and Production Engineering (WZL) of RWTH Aachen University, Germany, STEINERT ALEXANDER ,   Laboratory for Machine Tools and Production Engineering (WZL) of RWTH Aachen University, Germany, NEUS STEPHAN ,   Laboratory for Machine Tools and Production Engineering (WZL) of RWTH Aachen University, Germany
Published: October 2021

Process instabilities due to regenerative chatter pose significant limitations on the achievable material removal rates and thus on the profitability of machining operations. Stability lobe diagrams serve to exploit the maximum yet stable cutting depth and can be determined either analytically or experimentally. While analytical approaches suffer from inaccuracies because of the assumptions made for the specific models, experimental stability lobe diagrams require extensive cutting tests. Therefore, this paper introduces a new automated experimental method for determining stability lobe diagrams in milling with reduced effort regarding time. A closed-loop system is designed, containing a sensor-based online chatter detection along with a strategy to set parameters for subsequent cuts based on the stability boundaries known at each iteration. Both cuts with continuously increasing cutting depth and varied spindle speed are deployed to ensure fast detection of stability limits. The method is tested for a slot milling use case and the results are compared to a conventionally obtained stability lobe diagram yielding a significantly reduction in required time (-90 %) and resources (-67 %) whilst maintaining good accuracy. The reduced effort qualifies the proposed method as a tool to rapidly deliver maximum productive yet stable cutting parameters for optimization of existing or enhanced planning of new manufacturing processes.
EFFECTS OF INJECTION SPEED ON MECHANICAL PROPERTIES IN HIGH-PRESSURE DIE CASTING OF MG-RE ALLOY
Authors:   Graduate School of Science and Technology, Tokai University, KASHIWABARA YUKI , IBRAHIM MOHD DANIAL ,   Department of Mechanical and Manufacturing Engineering, Faculty of Engineering, Universiti Malaysia, ROSLAN LIDYANA BINTI ,   Department of Mechanical and Manufacturing Engineering, Faculty of Engineering, Universiti Malaysia, WATANABE HITOSHI ,   Kyokuto Die-Casting Co, Japan, SUNAMI YUTA ,   Department of Mechanical Engineering, Tokai University, Japan
Published: October 2021

In this study, in order to clarify the unknown physical properties of the Mg-Al-Th-RE alloy, the relationship between the injection conditions and the internal porosities and the mechanical properties exerted by the solidification microstructure were investigated. The obtained cast samples were investigated using X-ray CT internal measurements, tensile tests, Vickers hardness tests and solidification microstructure observations. The flow simulation and the X-ray CT analysis results showed that the porosity volume increased as the injection speed increases. The higher injection speed also affected the metal microstructure to become denser, which leads to a higher material strength and hardness. The eutectic phases quickly formed because of the shorter filled and cooled time. Therefore, the growth of the primary phase α-Mg was suppressed. On the other hand, it was considered that the material strength and hardness were greatly reduced by the coarse primary phase.
SIMPLE EVOLUTIONARY STRUCURAL OPTIMIZATION FOR MULTIPLE MATERIALS
Authors:   VSB – Technical University of Ostrava, Department of Applied Mechanics , Ostrava, Czech Republic, ROJICEK JAROSLAV , LICKOVA DAGMAR ,   VSB – Technical University of Ostrava, Department of Applied Mechanics , Ostrava, Czech Republic
Published: October 2021

An evolutionary procedure for multiple materials is presented. A material is selected due to an allowable stress interval for the material. The presented method includes a mesh-independent filter. The proposed algorithm is applied to three examples with four or five materials. In the presented examples, the effect of an evolution rate, a filter setting, and the number of elements, are shown in a simplified way. It is shown that the final topology of structure meets the stress requirements of the materials.
AUTOMATION OF THE DESIGN OF THE CROSS-SECTION OF THE MANIPULATOR ARMS PROFILE
Authors:   VSB - Technical University of Ostrava, Department of Robotics, Ostrava, Czech Republic, MIHOLA MILAN , ZEMAN ZDENEK ,   VSB - Technical University of Ostrava, Department of Robotics, Ostrava, Czech Republic, FOJTIK DAVID ,   VSB - Technical University of Ostrava, Department of Control Systems and Instrumentation, Ostrava, Czech Republic
Published: October 2021

The design of the arms of industrial robots and manipulators is a demanding process both in terms of expertise and in terms of the time required. For these reasons, algorithms have been created, with the help of which it is possible to design cross-sections of individual arms of robots and manipulators not only from the point of view of maximum allowed deflection but also from the point of view of minimizing cross-sectional dimensions or minimizing the weight of arms. These algorithms were subsequently used in the development of the software tool RobotArmDesign, with the help of which it is possible to simplify and shorten the arm design process significantly. This tool also has a connection to the SolidWorks CAD system and its simulation tools through its API interface, making it possible to refine robot arms designs while maintaining significantly shorter design times than would be the case with commonly used procedures. This tool's capabilities were demonstrated in the design of a robot arm with an angular structure and five degrees of freedom.
3D EVALUATION OF THE TOPOGRAPHY OF THE SURFACE BY ABRASIVE WATER JET MACHINING TECHNOLOGY
Authors:   Technical University of Kosice, Faculty of Mechanical Engineering, Department of Mechanical Engineering Technologies and Materials, MITAL GERHARD , SPISAK EMIL ,   Technical University of Kosice, Faculty of Mechanical Engineering, Department of Mechanical Engineering Technologies and Materials, MULIDRAN PETER ,   Technical University of Kosice, Faculty of Mechanical Engineering, Department of Mechanical Engineering Technologies and Materials, KASCAK LUBOS ,   Technical University of Kosice, Faculty of Mechanical Engineering, Department of Mechanical Engineering Technologies and Materials, JEZNY TOMAS ,   Technical University of Kosice, Faculty of Mechanical Engineering, Department of Mechanical Engineering Technologies and Materials
Published: October 2021

The article deals with contact and non-contact evaluation of surface roughness created by water jet cutting technology (AWJ). Non-contact surface measurement was performed using an LPM laser profilometer. The values measured by the laser profilometry method were compared with the values measured by the contact method, the Mitutoyo SJ 400 roughness meter. Six samples were produced. Three in stainless steel and three in structural steel. In order to achieve a different surface topography, different feed rates of the cutting head were used on the samples, which was reflected in the quality of the resulting surface. The evaluated parameters were the average arithmetic deviation of the assessed profile and the largest height of the profile inequality.
IDENTIFICATION OF CHARACTER AND INTENSITY OF WEAR OF PVD COATED TWIST DRILLS IN DRILLING OF C 45 MATERIAL
Authors:   STATON, s.r.o, Turany, Slovakia, HARSANI MARIAN , MIKLOS MATEJ ,   STATON, s.r.o, Turany, Slovakia, MORGOS IVAN ,   STATON, s.r.o, Turany, Slovakia
Published: October 2021

This article is aimed to investigation of four different PVD coatings of STATON company in order to determine a wear behavior on twist drills when drilling C45 material. A pearlite-ferrite structure of C45 material is common material for automotive industry and highly abrasive to cutting tools. Our comparative study is focused on flank wear of the cutting wedge of observed drills deposited at STATON. The article shows differences in chemical composition and their effects on wear behavior at the corner of the drill and along the cutting edge. We also demonstrate that chemical composition has significant influence on the temperature of a build-up edge during cutting.
INFLUENCE OF VIBRATION MAGNITUDE IN MACHINING OF MATERIALS BY TURNING TECHNOLOGY
Authors:   Technical University of Kosice Faculty of Manufacturing Technologies Presov, Slovakia, OLEJAROVA STEFANIA , KRENICKY TIBOR ,   Technical University of Kosice Faculty of Manufacturing Technologies Presov, Slovakia
Published: October 2021

The basic task of any prosperous company is to minimize operating costs to a minimum. High-quality maintenance ensures an increase in the operational reliability of the machines. It is important to find a compromise between scheduled maintenance and production process requirements, so resources are spent to optimize the maintenance schedule. This is provided by technical diagnostics, which helps to monitor the technical condition and functional properties of the monitored machine under specified operating conditions. The publication is focused specifically on vibration diagnostics and its use in monitoring the transmission of vibrations during the turning of selected types of materials in the company with a focus on engineering, the ZVL AUTO s.r.o. The scope of research is mainly focused on the monitoring process in order to analyze the magnitude of vibration acceleration at two preselected parts of the machine tool - lathe.
Visualizing the Impact of Cyberattacks on Web-Based Transactions on Large-Scale Data and Knowledge-Based Systems
Authors: Manavalan Mani , Chisty Nur Mohammad Ali
Published: October 2021

Manual approaches rely on the abilities and knowledge of individual human administrators to detect, analyze, and interpret attacks. Intrusion Detection Systems (IDS) are systems that can automatically detect and warn the appropriate persons when an attack occurs. Despite the fact that individual attacks can be useful, they are frequently insufficient for understanding the entire attacking process, as well as the attackers' talents and objectives. The attacking stage is usually merely a component of a larger infiltration process, during which attackers gather information and set up the proper conditions before launching an attack, after which they clear log records in order to conceal their footprints and disappear. In today's assault scenarios, the pre-definition of cause-and-effect links between events is required, which is a tough and time-consuming task that takes considerable effort. Our technique for creating attack scenarios is based on the linking nature of web pages, and it does not require the pre-definition of cause and effect links, as demonstrated in previous work. Constructed situations are displayed in spatial and temporal coordinate systems to make viewing and analyzing them more convenient. In addition, we develop a prototype implementation of the concept, which we utilize to test a number of assault scenario scenarios.
The World after COVID-19: the Necessity of Transition to a New Development Paradigm
Authors: Bondarenko V. M.
Published: October 2021

This article is a continuation of a large-scale research devoted to the identification of patterns of human community development, which has been conducted by the author for many decades.

Purpose: is to study the possible transformation of the world after the COVID-19 pandemic from the perspective of the need to switch to a new, crisis-free development paradigm, which is a logical continuation of the previous author's works.

Methods: the study is based on the application of a complex of general scientific methods, including analysis, generalization, comparison, etc., and is based on an interdisciplinary approach. The results and conclusions of the work are based on the use of the author's methodological tools, which were formed within the framework of the general research direction.

Results: the article analyzes the current state of the global world in the absence of effective ways out of the deepest crisis that has long gripped almost the entire world and has been multiplied by the COVID-19 pandemic. The study of the fundamental works of foreign scientists has shown that their main thesis is that the future of the world lies in the transition to a new development paradigm (NDP), but to fully understand it, it is necessary to develop a new scientific paradigm (NSP). Based on the use of the author's development of the NSP, it is demonstrated that the future of the world depends on the choice of a development model. The author has proved the necessity and possibility of transition to a new development paradigm based on the synchronous development and implementation of a single development strategy for the global world and each country separately.

Conclusions and Relevance: after the COVID-19 pandemic, the world will change only if there is a transition to a new crisis-free paradigm for the development of the human system. The NSP developed by the author can become the tool that allows you to give a complete understanding of the NDP, and see what the world can and should be like after the coronavirus pandemic.
Experimental investigation of the self-healing of terahertz Bessel beams with orbital angular momentum
Authors:   Samara National Research University, Pavelyev V.S. ,   IPSI RAS – Branch of the FSRC “Crystallography and Photonics” RAS, Tukmakov K.N. ,   Samara National Research University, Reshetnikov A.S. ,   Samara National Research University, Gerasimov V.V. ,   Novosibirsk State University,   Budker Institute of Nuclear Physics, Osintseva N.D. ,   Novosibirsk State University,   Budker Institute of Nuclear Physics, Knyazev B.A. ,   Novosibirsk State University,   Budker Institute of Nuclear Physics
Published: October 2021

Experimental results of the investigation of self-healing properties of terahertz Bessel beams with orbital angular momentum (OAM) with topological charges of l=3 and l=4 in free space after passing through a dispersive medium are presented.
Study of the temporal distribution density of the shot sheaf span to create a simulation model of the optical sensor signal
Authors:   Kalashnikov Izhevsk State Technical University, Vdovin A.Yu.
Published: October 2021

When studying the space path of a cloud of pellets from a shotgun and evaluating its parameters, it is advisable to have a simulation model of the optical sensor signal when a shot sheaf crosses the light screen. To create such a model, you need to get the relationship between the scale parameter in the Rayleigh distribution and the time span of the shot sheaf. Studies of the temporal distribution density of the shot sheaf span are performed, and graphs of the distribution density of the span for near-real situations are constructed. A linear dependence of the mathematical expectation of the span distribution density on the scale parameter in the Rayleigh distribution is established. A simplified expression is obtained for calculating the mathematical expectation of the time span of the shot sheaf. Statistical modeling confirmed the possibility of the practical use of the proposed formulas, including with a large number of pellets (up to 1000). The dependence of the mathematical expectation of the span on the number of pellets is investigated, its approximation by various functions is carried out, and the approximation errors are estimated. The research conducted allows us to create a simulation model of the optical sensor signal when the shot sheaf crosses the light screen on the basis of empirical data on the real-signal duration (with averaged measurement data for several shots being helpful).
Optical image edge detection by transmissive metal-dielectric-metal structures
Authors:   IPSI RAS – Branch of the FSRC “Crystallography and Photonics” RAS, Nesterenko D.V. ,   Samara National Research University, Morozov A.A. ,   IPSI RAS – Branch of the FSRC “Crystallography and Photonics” RAS, Doskolovich L.L. ,   IPSI RAS – Branch of the FSRC “Crystallography and Photonics” RAS,   Samara National Research University
Published: October 2021

The feasibility of an optical image edge detection based on metal-insulator-metal (MIM) resonance transmission structures is experimentally investigated. The structures are fabricated on a glass substrate and consist of thin aluminum layers separated by a quartz layer. The excitation of Fabry-Perot modes by an incident wave produces resonance line shapes in angular and wavelength transmission spectra. Resonance enhancement and suppression of beams using the MIM structures can be implemented for suppressing the illuminating beam and amplifying the field scattered by an object. By using the MIM structure under oblique incidence, we experimentally observe the efficient image edge detection for phase optical elements at a set of wavelengths. The obtained images of edges of the elements exhibit a directionality of image edge detection that depends on the direction of inhomogeneity gradient in the object plane, as suggested by the angular transmission spectra of the MIM structures. The results of the present work can find applications in optical information processing and optical filtering systems.
Automated combination of optical coherence tomography images and fundus images
Authors:   Samara National Research University, Fida A.D. , Gaidel A.V. ,   Samara National Research University,   IPSI RAS – Branch of the FSRC “Crystallography and Photonics” RAS, Demin N.S. ,   Samara National Research University,   IPSI RAS – Branch of the FSRC “Crystallography and Photonics” RAS, Ilyasova N.Yu. ,   Samara National Research University,   IPSI RAS – Branch of the FSRC “Crystallography and Photonics” RAS, Zamytskiy E.A. ,   Samara Regional Clinical Ophthalmological Hospital named after T.I. Eroshevsky
Published: October 2021

We discuss approaches to combining multimodal multidimensional images, namely, three-dimensional optical coherence tomography (OCT) data and two-dimensional color images of the fundus. Registration of these two modalities can help to adjust the position of the obtained OCT images on the retina. Some existing approaches to matching fundus images are based on finding key points that are considered invariant to affine transformations and are common to the two images. However, errors in the identification of such points can lead to registration errors. There are also methods for iterative adjustment of conversion parameters, but they are based on some manual settings. In this paper, we propose a method based on a full or partial search of possible combinations of the OCT image transformation to find the best approximation of the true transformation. The best approximation is determined using a measure of comparison of preprocessed image pixels. Further, the obtained transformations are compared with the available true transformations to assess the quality of the algorithm. The structure of the work includes: pre-processing of OCT and fundus images with the extraction of blood vessels, random search or grid search over possible transformation parameters (shift, rotation and scaling), and evaluation of the quality of the algorithm.
Advanced Hough-based method for on-device document localization
Authors:   Moscow Institute of Physics and Technology (National Research University), Tropin D.V. ,   FRC CSC RAS,   LLC "Smart Engines Service", Ershov A.M. ,   Moscow State University,   LLC "Smart Engines Service", Nikolaev D.P. ,   Institute for Information Transmission Problems of the RAS (Kharkevich Institute),   LLC "Smart Engines Service", Arlazarov V.V. ,   FRC CSC RAS,   LLC "Smart Engines Service"
Published: October 2021

The demand for on-device document recognition systems increases in conjunction with the emergence of more strict privacy and security requirements. In such systems, there is no data transfer from the end device to a third-party information processing servers. The response time is vital to the user experience of on-device document recognition. Combined with the unavailability of discrete GPUs, powerful CPUs, or a large RAM capacity on consumer-grade end devices such as smartphones, the time limitations put significant constraints on the computational complexity of the applied algorithms for on-device execution. In this work, we consider document location in an image without prior knowledge of the document content or its internal structure. In accordance with the published works, at least 5 systems offer solutions for on-device document location. All these systems use a location method which can be considered Hough-based. The precision of such systems seems to be lower than that of the state-of-the-art solutions which were not designed to account for the limited computational resources. We propose an advanced Hough-based method. In contrast with other approaches, it accounts for the geometric invariants of the central projection model and combines both edge and color features for document boundary detection. The proposed method allowed for the second best result for SmartDoc dataset in terms of precision, surpassed by U-net like neural network. When evaluated on a more challenging MIDV-500 dataset, the proposed algorithm guaranteed the best precision compared to published methods. Our method retained the applicability to on-device computations.
A minimal subwavelength focal spot for the energy flux
Authors:   IPSI RAS – Branch of the FSRC “Crystallography and Photonics” RAS, Stafeev S.S. ,   Samara National Research University, Zaicev V.D. ,   IPSI RAS – Branch of the FSRC “Crystallography and Photonics” RAS,   Samara National Research University
Published: October 2021

It is shown theoretically and numerically that circularly and linearly polarized incident beams produce at the tight focus identical circularly symmetric distributions of an on-axis energy flux. It is also shown that the on-axis energy fluxes from radially and azimuthally polarized optical vortices with unit topological charge are equal to each other. An optical vortex with azimuthal polarization is found to generate the minimum focal spot measured for the intensity (all other parameters being equal). Slightly larger (by a fraction of a percent) is the spot size calculated for the energy flux for the circularly and linearly polarized light. The spot size in terms of intensity is of importance in light-matter interaction, whereas the spot size in terms of energy flux affects the resolution in optical microscopy.
A method for optimal linear super-resolution image restoration
Authors:   Samara National Research University, Maksimov A.I. , Sergeyev V.V. ,   Samara National Research University,   IPSI RAS – Branch of the FSRC “Crystallography and Photonics” RAS
Published: October 2021

In this paper, we propose a super-resolution (pixel grid refinement) method for digital images. It is based on the linear filtering of a zero-padded discrete signal. We introduce a continuous-discrete observation model to create a reconstruction system. The proposed observation model is typical of real-world imaging systems - an initially continuous signal first undergoes linear (dynamic) distortions and then is subjected to sampling and the effect of additive noise. The proposed method is optimal in the sense of mean square recovery error minimization. In the theoretical part of the article, a general scheme of the linear super-resolution of the signal is presented and expressions for the impulse and frequency responses of the optimal reconstruction system are derived. An expression for the error of such restoration is also derived. For the sake of brevity, the entire description is presented for one-dimensional signals, but the obtained results can easily be generalized for the case of two-dimensional images. The experimental section of the paper is devoted to the analysis of the super-resolution reconstruction error depending on the parameters of the observation model. The significant superiority of the proposed method in terms of the reconstruction error is demonstrated in comparison with linear interpolation, which is usually used to refine the grid of image pixels.