bluuebunny/crossref_metadata_2025 huggingface dataset:
İSLAM MUHÂKEME HUKUKUNDA MÜLKİYETE DAYALI İSTİHKÂK DAVASI
Authors: HİRA Ayhan
Published: May 2022

Mülkiyet hakkı, bir şeye mâlik olan kimseye hukuk düzeninin sınırları içinde, o şey üzerinde dilediği gibi kullanma, yararlanma ve tasarrufta bulunma bakımından en geniş yetkileri sağlayan aynî nitelikte bir haktır. Mülkiyete dayanan istihkak davası ise, mâlikin eşya üzerindeki mülkiyet hakkının üçüncü kişilere karşı korunması amacıyla tanınmış bir haktır. Bu yönüyle istihkak, mülkiyet hakkıyla kazanılan ve haksız zilyede karşı uygulanan bir tür yaptırım niteliğindedir. İstihkak davasında söz konusu amacın gerçekleştirilebilmesi için, zilyedliğini kaybeden mâlikin dava konusu malda hak sahibi olduğunu ispat etmesi istenmektedir. Bu davada davacı taraf, muhakeme sürecinden sonra gerçek mâlik olduğunun tespit edilmesinin ardından malını haksız zilyedden geri alır. İstihkak, klasik fıkıh kaynaklarında müstakil başlık altında incelendiği gibi, malın haksız yere ele geçirilmesine dair hükümleri içeren gasp ve itlaf bölümlerinde ele alınmıştır. Bu başlıklarda verilen bilgilere göre, dava konusu olan malın bir kısmının veya tamamının talep edilmesi esnasında bu malda eksilme yahut artma şeklinde herhangi bir değişiklik söz konusu olmuşsa, eksilmeyi kimin tazmin edeceği ve artışın kime ait olacağı hakkında farklı görüşler bulunmaktadır. Mülkiyete dayanan istihkak davası, yürürlükteki hukuk sisteminde (TMK, md. 683) İslam hukukunda olduğu gibi mülkiyet hakkının korunması bağlamında düzenlenmiştir. Bu hakkın gereği olarak da malı haksız şekilde elinde bulunduran kimseye karşı istihkak davası açma hakkı tanınmıştır. Teknolojinin sağladığı imkânlar dolayısıyla mülkiyet, mülkiyeti kazanma yollarıyla ilgili uygulamalar ve mülkiyetin korunması meseleleri günümüzde daha önemli hale geldiğinden dolayı, klasik fıkıh kaynaklarındaki görüşlerin bu konudaki hukukî tartışmalara katkı sağlayacağı düşünülmektedir. Bu amaçla bu makalede aynî nitelikli istihkak davasının mahiyeti ve hükümleri, mezhepleri temsil düzeyindeki birinci el kaynaklardaki görüşler esas alınarak incelenmiş, bu görüşler yürürlükteki hukuk sistemiyle mukayese edilerek değerlendirilmiştir.
Expert voices in South African mass media during the COVID-19 pandemic
Authors: Joubert Marina , Guenther Lars , Rademan Lili
Published: May 2022

Scientists increasingly recognise that media visibility allows them to gain influence in public and policy spheres. However, some scientists shy away from publicity and journalists are purposefully selective when they seek out experts to interview. This may result in a skewed representation of scientists in the mass media. In this study, we explored which South African scientific experts at the academic rank of ‘professor’ were quoted in the local mass media during the initial 6 months of the COVID-19 pandemic. Our analysis of 1164 media articles related to COVID-19 showed that, as far as gender is concerned, men dominated as expert sources, with women accounting for only 30% of quoted professors. In terms of research field, most experts were from the broad field of health and medicine, with an under-representation of social scientists. We reflect on the implications and consequences of a skewed media representation of scientific expertise, as well as some of the options to remedy these imbalances.
Significance:

This is the first study to identify the most visible science experts in the mass media in South Africa during the COVID-19 pandemic.
We recommend options for institutions, researchers, media editors and journalists to help diversify expert sources that are featured or quoted in the mass media.
Electronic consent in a COVID-19 vaccine implementation trial in South Africa: Participant perspectives
Authors: Nair Gonasagrie , Kabanda Siti M. , Jacobs-Alfred Meagan M.M. , Obasa Adetayo E.A. , McCaul Michael G. , Moodley Keymanthri
Published: May 2022

The COVID-19 pandemic has warranted modifications to clinical research implementation to ensure adherence to public health and safety measures. Often, this modification has necessitated a deviation from the traditional face-to-face approach to an electronic or hybrid consent process. We assessed the acceptability and preference for electronic consent and explored understanding of the electronic consent information – an outcome which is vital in providing reassurance that consent is provided with full appreciation of the risks and benefits of study participation. In this descriptive study, healthcare professionals (HCPs) were invited, through a database of HCP contacts, snowball sampling and advertisement, to participate in an online survey between 14 July 2021 and 17 September 2021, to explore their experiences of providing electronic consent for enrolment into the largest implementation trial of a COVID vaccine in South Africa (SISONKE Trial). Descriptive analysis was used to characterise respondents and categorical data were expressed as frequencies. The prevalence of recurring responses to open-ended questions allowed for the identification of themes. A total of 1025 HCPs completed the online survey. Access to a COVID-19 vaccine was the strongest motivating factor for enrolment (82.3%) into the SISONKE Trial. Over a third of participants (38.6%) were not able to discuss the study with research staff. While the majority of participants (85.2%) indicated that online consent was acceptable, it was recognised that acceptability was context specific. Although 64% indicated awareness that reporting both a positive COVID test and adverse events were requirements, a significant percentage (32%) did not recall that the reporting period was 2 years. The electronic consent process was easily navigated by educated HCPs with access to electronic devices and data. Vaccine access was the most important motivation for participation, thus raising questions about how voluntary the consent process was and the role of desperation in deciding to participate.
Significance:

Navigation of the electronic consent process for participation in a COVID-19 vaccine implementation trial is not a challenge for educated healthcare professionals with access to electronic devices and data. However, technical skills and access to technology may impact the integrity of the informed consent process for lay research participants.
Motivation to join research studies for access to scarce resources impacts negatively on the authenticity of the consent processes, as participation may be informed but not truly voluntary, and is an issue that ethics committees and researchers should address.
Categorization as a Universal Process: the Role of Categories in Perceptual Processes and Formation of Actions
Authors:   HSE University, Anufrieva Anastasia A. , Dagaev Nikolay I. ,   HSE University, Gorbunova Elena S. ,   HSE University
Published: May 2022

This article is intended to highlight the existing theoretical concepts and empirical data on the role played by different levels of categories in the processes of perception and formation of actions with a person. In this context, we consider several topics, such as: the superiority of base-level categories, the phenomenon of incidental findings, the effects of compatibility and orientation, the role of goals in actions regarding categorization of objects, and some other topics. One of the key examples of the influence of categorization on other cognitive processes is the effect of the superiority of categories of the base level: when deciding whether a given stimulus belongs to a certain category, the answer is faster if the category belongs to the base level compared to superordinate and subordinate. One of the main areas of study of the effect of the advantages of categories of the basic level is the study of the role of this effect in perceptual tasks. One of these tasks is the visual search - the search for target stimuli among distractors. One of these is a guided search - directing attention to certain objects. There are modifications of the visual search - search collection and hybrid search. The belonging of an object to a certain category affects the efficiency of the visual search, as well as the occurrence of perceptual errors. Another important area of study of categorization is to elucidate the relationship between categorization and affordances - perceived possible actions with other objects. Most of these studies focus on the role of categorization in generating compatibility and orientation effects. Finally, this comprehensive study of the relationship between categorization, perception, and affordances mostly occurs as “gaze behavior” in relation to the action that creates clarity in visible objects.
The Subjective Quality of Time as an Object of Psychological Assessment
Authors:   HSE University, Leontiev Dmitry A. , Osin Evgeny N. ,   HSE University
Published: May 2022

The paper is focused at the development and validation of a psychometric scale of the subjective quality of time. The subjective quality of time is the measure of fullness with which one can experience a certain period of time, or the time associated with certain activity. Based on this, we aimed to develop a scale for measuring the subjective quality of time. The original version of the scale included 15 bipolar rating scales. In the process of testing and improving the psychometric characteristics of the inventory, the number of scales was reduced to 5. The one-factor model for 5 statements showed an acceptable fit to the data (multigroup model in Mplus 8.4, MLR statistic: X2(20) = 36.10, p = 0.015, CFI = 0.963, RMSEA = 0.089, 90% CI [0.039; 0.134], SRMR = 0.036). The reliability of the scale (Cronbach's alpha) ranged from 0.79 to 0.87 in different samples. Several studies have focused on the construct validity of the new measure. In the study about the characteristics of self-regulation of hatha yoga practitioners, the assessment of the quality of time of yoga practice was significantly higher than the assessment of the quality of time for filling out questionnaires (Student's t-test: p<0.001; d = 1.22). In another study of psychological and behavioral responses to the Covid-19 pandemic, the scale of the subjective quality of time was offered to a sample of students as part of a set of measures. As we expected, against the background of the unfolding pandemic, assessment of the quality of time for the last month was significantly lower than for the previous year. It also significantly correlated with other indicators of subjective well-being. There were no significant links between the assessment of the quality of time over the past month and over the past year with emotions and fears caused by the coronavirus pandemic. Thus, the developed time quality scale has good psychometric characteristics and is suitable, among other things, for mass monitoring surveys
Daily Activities of Adolescents in Mixed Reality: User Activity and Multitasking
Authors:   Lomonosov Moscow State University, Soldatova Galina U. , Chigarkova Svetlana V. ,   Lomonosov Moscow State University, Koshevaya Anastasia G. ,   Lomonosov Moscow State University, Nikonova Evgenia Yu. ,   Lomonosov Moscow State University
Published: May 2022

This paper explores, through the diary method, the daily activities of adolescents in offline, online, and mixed reality. Particular attention is paid to two new formats of activity: Internet user activity, including hyperconnectivity, and media multitasking, which attract more and more attention from researchers. These types of activities are not only important features of digital socialization, but they also determine a person's transition to a mixed reality. The study involves 125 adolescents aged 14-18 years. In the first stage, the study was conducted on the base of an online service Google Forms, in the second stage we used a chatbot in Telegram. The results confirm the data about the high level of adolescents' user activity. Adolescents show significant underestimation of their level of user activity - on average, up to a third of the time they estimate. A change in the image of the world is noted: more than a third of adolescents participating in the study feel that they are living in a mixed reality. At the same time, this image is typical for adolescents with higher user activity, primarily hyperconnected adolescents. The vast majority of adolescents subjectively define themselves as multitaskers, and they appreciate their effectiveness in this format quite highly. Combination of different types of activity turns out to be representative for adolescents with higher user activity, especially for hyperconnected adolescents who use multitasking format more intensively. The dynamics of its use are revealed: in comparison with the peak of multitasking activity on weekdays, when adolescents combine studying with searching for additional information and other educational activities, as well as socializing, there is a decrease in multitasking activity at weekends, except for evening hours. In this context, multitasking can be seen as a tool for adapting to the complexity and diversity of the modern world. The nature of the combination of online and offline activities is similar to the combination of online activities: on weekdays in the morning study is combined either with communicative or educational search activities, in the evening adolescents combine the performance of everyday activities with communicative, entertaining or educational search activities online. Thus, high user activity and multitasking are among the attributes of a mixed reality resident, and digital activity does not replace habitual age-specific social practices, but complements and probably enhances opportunities to fulfill adolescents' needs, primarily in communication and cognitive activities.
Existential Anxiety of Religious Identity and Religious Extremism in Indonesian Muslims
Authors: Buana Dana Riksa , Lukyanov Oleg V. ,   National Research Tomsk State University
Published: May 2022

Relevance and object of research. In this modern world, the system of managing large social processes is a foot. A dangerous social trend of the so-called “information society” is identity manipulation, including religious identity. Relevant questions: What distinguishes an authentic religious identity from an extremist one? What qualities of devoutness are necessary and sufficient for understanding devoutness? The article presents the results of a study on religious identity of Indonesian Muslims. Subject, methods and materials of research. Data was collected from 484 Indonesian Muslims to confirm that existential anxiety plays the role of a mediator variable in the negative correlation between authentic religious identity and religious extremism. The survey was conducted using a google form. Mediation regression analysis was implemented. Three methods were used to collect data: the Authentic Religious Identity Scale, the Existential Anxiety Scale, and the Religious Extremism Scale. When testing the reliability and validity of these scales, the SPSS (Statistical Package for the Social Sciences) and JASP (Jeffrey's Amazing Statistics Program) programs were used. Results. The study found that authentic religious identity is negatively associated with existential anxiety, and existential anxiety was definitely associated with religious extremism. An assumption is that an authentic religious identity makes it possible to overcome existential anxiety, forming a social tendency to reduce the risk of developing religious extremism. If existential anxiety is not included in the research model, then there is a correlation between authentic religious identity and religious extremism. This means that without taking into account existential anxiety it is not possible to distinguish authentic devoutness from an extreme one. The study shows that authentic devoutness cannot completely eliminate the risk of developing an extremist view. To make this distinction the factor of favoritism was necessary, hence the nesecesticity of empirical studies to include the phenomena between spirituality and devoutness.
Assessment System for Subjective Well-being of Russian Schoolchildren: a Theoretical and Methodological Rationale
Authors:   Federal Institute for Educational Development RANEPA, Avalueva Natalia B. , Alekseeva Anna S. ,   Federal Institute for Educational Development RANEPA, Alieva Evelina F. ,   Federal Institute for Educational Development RANEPA
Published: May 2022

The article considers the meaningful understanding of the category "subjective well-being of Russian schoolchildren" and determines the methodological rationale for developing an assessment system for it. The subjective well-being of Russian students' families is studied through the level of positive/negative emotions and the realization of personal potential, i.e. as satisfaction with such areas of life as family and education. The aim is to describe the methodology for developing an assessment system for subjective well-being of Russian schoolchildren at different stages of education, based on the theoretical analysis of existing meaningful interpretations of the "subjective well-being" category and methods for identifying its level. The task of developing the assessment system for subjective well-being is being solved by identifying and justifying social and psychological factors of family and school environment. Significant factors that affect the children's well-being can include family relationships, spiritual unity, material security, relations with classmates, learning achievements, educational environment. To develop the assessment system we used methods of system analysis, methods of induction and deduction, methods of mathematical analysis, the method of factor analysis and others. The methodology for determining the subjective well-being of Russian schoolchildren includes a criterial framework and assessment tools. Taking into account the identified social and psychological factors of family and school environment, the subjective well-being is studied in criteria of satisfaction/dissatisfaction (positive/negative emotions) and realization of a child's personality potential. The assessment system presents the criteria for identifying the subjective well-being of Russian schoolchildren at different levels of education as two blocks: family and educational well-being. The methodological structuring of the criteria allowed us to develop mathematical formulas which can be used to obtain numerical expressions of both the level of subjective well-being itself and the levels of family and educational well-being.
Early Maladaptive Schemas as Stress and Emerging Mental Pathology “Moderators
Authors:   V. Serbsky National Medical Research Centre for Psychiatry and Narcology, Karaush Irina S. , Kupriyanova Irina E. ,   Mental health research institute, National Research Medical Centre
Published: May 2022

The article presents an overview of researches aimed at studying the consequences of the traumatic childhood experience and not satisfied basic psychological needs. The emerging maladaptive schemas are considered the “moderators” in the association with stress and psychopathology. The emerging maladaptive schema is a stable pattern consisting of memories, emotions, knowledge and perceptions regarding oneself and relationships with other people. The main distinguishing features of emerging maladaptive schemes are: first, dysfunctional experiences that arise as a result of a child's interaction in the communication process with family members; second, perception of schemes as factual knowledge about themselves and surrounding reality; third, activation by external factors. The research data on the relationship between emerging maladaptive schemas and various categories of mental disorders are presented. The relationship of different schemas with various types of fears is described. It has been shown that the frequency of depressive and anxiety disorders is higher in people with ineffective emotional schemas. This is due to the fact that a maladaptive schema causes a person to misunderstand his emotions or interpret them negatively. The features of maladaptive schemas in patients with obsessive-compulsive disorders and schizophrenic spectrum disorders were revealed too. The emerging maladaptive schemas negatively affect mental health and well-being of an individual, his interpersonal relationships, and the ways of emotional response, which determines the need for therapy. Special attention is given to the researches of maladaptive schemas in adolescence with the prospect of their correction and mental status stabilization. In general, there are few studies concerning the identification of emerging maladaptive schemas in adolescents, and they show only the relationship of emerging maladaptive schemas with individual psychological characteristics. Considering that during life the maladaptive schemas become more complex and affect an increasing number of functioning areas, it seems appropriate to identify these schemas at young age, when they do not have a clear structure, are not rigid and do not cause persistent maladjustment in all spheres of functioning. However, until now, in studies of the adolescent population the aspects of studying the role of maladaptive schemas as a link between the traumatic childhood experience, problem parent-child relationships and emerging psychopathology had not been sufficiently studied. In comparison with adults, psychotherapeutic and psycho-corrective tactics of working with activated maladaptive schemes in adolescents have been developed to a lesser extent.
Evaluation of Psychometric Properties of “Level of Parental Emotional Burnout”
Authors:   V.M. Bekhterev National Medical Research Centre for Psychiatry and Neurology, Shishkov Alexandra M. ,   St. Petersburg State Pediatric Medical University, Bocharov Victor V. ,   V.M. Bekhterev National Medical Research Centre for Psychiatry and Neurology; St. Petersburg State Pediatric Medical University, Chernaya Yuliya S. ,   V.M. Bekhterev National Medical Research Centre for Psychiatry and Neurology
Published: May 2022

Introduction. The process of raising a child can be associated with a significant number of chronic stressors that lead to the depletion of parents' mental resources. Parents of a child with disabilities, in addition to the usual stressors associated with the upbringing process, often bear an additional stress load due to the need to implement specialized measures aimed at maintaining the child's health and ensuring normal socialization. This dramatically increases the risk of parental burnout. At the moment, there is an acute shortage of specialized methods for assessing burnout for this contingent. Aims and objectives. The purpose of this study was to assess the psychometric characteristics of this technique “Level of Parental Emotional Burnout” (LPEB/PV), designed with reference to the family relationship context. Materials and Methods. The study involved 138 parents (mean age 36.5; SD = 7.01) of chronically ill children. The assessment of convergent and divergent validity of LPEB/PV was carried out using the methodology for diagnosing attitudes towards a child's illness, a questionnaire of symptomatic complaints (SCL-90-R), a family environment scale (FSS), and the Scale of basic beliefs in adaptation by M.A. Padun and A.V. Kotelnikova. Results. The conducted research showed that the scales of the LPEB/PV methodology corresponded to the developed theoretical construct, that is, it confirmed the construct validity of the methodology. The presented results demonstrate good psychometric characteristics of the LPEB/PV methodology in all studied parameters: re-test reliability and reliability of content samples, internal construct, convergent and divergent cross-validity. It is apparent for the necessity of additional study of the phenomenon from the highly personal engagement of the fight against the child's illness by parents. The scales reflecting this phenomenon found a correlation between the scales diagnosing manifestations of distress in parents with the situation of a child's chronic illness. Conclusion. Based on the results of the primary psychometric test, it can be said that the LPEB/PV method can be used to study emotional burnout in parents of chronically ill children, both in specialized counseling centers and in healthcare facilities where children with disabilities are treated.
Application of the Loewner-Kufarev theory to the construction of a parametric set of univalent functions of a certain form
Authors:   Institute for the Development of Education of the Krasnodar Territory, Zadorozhnaya Olga V. , Kochetkov Vladimir K. ,   Kalmyk State University
Published: May 2022

This work relates to the theory of Loewner-Kufarev differential equations, which are a part of the geometric function theory. We apply the well-known second Loewner-Kufarev differential equation to construct a parametric family of univalent functions in the unit disk g(z, t) for each fixed non-negative value of the parameter t generalizing the known parametric families. The article also uses various alternative approaches and provides their comparative analysis. The results of the study can be considered as one sufficient condition for the uniqueness of regular functions in a unit disk. Leading Russian scientists made a great contribution to the development of the geometric function theory based the variational-parametric method for studying functionals and found some Loewner-Kufarev differential equations. There are three sections in the work. The first one applies the Loewner-Kufarev equation to construct a parametric set of univalent functions of a certain type. In the second section, we introduce a special class of regular functions in the unit disk with a fixed convex function, and prove the univalence property for functions of this class. Here we also show one more method for constructing a parametric family of univalent functions different from the methods described in the first paragraph. The third section is devoted to alternative methods for constructing one-parameter sets of univalent functions. AMS Mathematical Subject Classification: 35С15
Combustion of the metallized composite solid chunk fuel charge with a flat channel in a mass force field
Authors:   Tomsk State University (Tomsk, Russian Federation), Poryazov Vasiliy A. , Krainov Dmitry A. ,   National Research Tomsk State University, Blokhina Anna A. ,   National Research Tomsk State University
Published: May 2022

In this paper, combustion of a channel charge of a metallized composite solid chunk fuel in the field of mass forces is modeled. We have investigated the influence of the g-force on the total mass influx from the combustion surface of two parallel plates of the metallized solid fuel. The combustion rate of the fuel is calculated based on the nonstationary model of the metallized solid fuel combustion. The conducted computational and theoretical analysis has provided the data on the influence of the mass forces and the composition of the fuel on the total mass influx from the combustion surface. The g-force values are ranged from -650 to 650 m/s2. It is assumed that the g-force is directed along the normal to the combustion surface; otherwise, the projection of the g-force onto the normal to the combustion surface is considered. The obtained results have shown that the effect of the g-force is not symmetric - the g-forces, which are identical in magnitude but different in sign, lead to a different response of the combustion rate. The character of the dependence between the combustion rate and g-force for the particles with the radius greater than 7.5 pm is nonmonotonic. The obtained results demonstrate the importance of taking into account the effect of the g-force on the combustion rate when simulating nonstationary processes in solid propellant engines at the stages of start, maneuvering, and deceleration.
Comparative analysis of combustion of particles of boron, boron carbide, boron nitride and carbon in air
Authors:   Ishlinsky Institute for Problems in Mechanics RAS, Rashkovskiy Sergey A. ,   Tomsk State University, Fedorychev Alexander V. ,   Federal Center for Dual-Use Technologies "Soyuz", Milekhin Yuri M. ,   Federal Center for Dual-Use Technologies "Soyuz"
Published: May 2022

Combustion models of main components of condensed combustion products (CCP) of boron-containing solid propellants: boron, boron carbide, boron nitride, and carbon are analyzed. Using the known experimental data, the parameters of the combustion model of boron carbide and boron nitride particles are determined. Using the models of combustion of boron, B4C, BN and carbon particles, parametric calculations of the combustion of both individual abovementioned particles and their mixture, which simulates the composition of the CCP of boron-containing solid propellant, have been carried out. Calculations have shown that combustion of BN has the least effect on the completeness of CCP combustion. This is due to its low calorific value and low content in CCP. Ceteris paribus, carbon particles burn the fastest; however, their contribution to the completeness of CCP combustion is less than that of boron and boron carbide due to their lower calorific value.
Simulation of gas aerodynamics and particle trajectories in the interaction of two opposing swirling flows
Authors:   Tomsk State University (Tomsk, Russian Federation), Turubaev Roman R. , Shvab Aleksander V. ,   National Research Tomsk State University
Published: May 2022

The paper presents an original geometry of a vortex chamber in which aerodynamics of a gas flow is simulated during the interaction of two opposing swirling flows in order to equalize the centrifugal forces in the central region of the apparatus as applied to the tasks of separating powders by fractional composition or intensifying heat and mass transfer in chemical reactors. Based on the results obtained, the distributions of the trajectories of motion of single particles are determined, based on the discrete-trajectory approach, and the reliability of the results obtained for the aerodynamics of swirling flow in the proposed geometry of the vortex chamber was shown. As a result of mathematical modeling of the dynamics of motion of a single heavy particle in a swirling flow, the influence of swirl on the quality of the particle classification process is shown; for example, an increase in swirl leads to a greater influence of the centrifugal force which picks up heavy particles and throws them to the peripheral sector. In addition, an increase in the centrifugal force leads to a displacement of the boundary particle size. However, since this work presents a laminar formulation of the problem, the difference will amount to tens of microns; when updating to the turbulent problem, the difference will already be calculated in units of microns.
Algorithmization of the solution of dynamic boundary value problems of the theory of flexible plates taking into account shift and rotation inertia
Authors:   Tashkent State Technical University, Yuldashev Adash Yu. , Pirmatov Shamshod T. ,   Tashkent State Technical University
Published: May 2022

Most of the problems on flexible plates are solved in the Föppl-von Karman formulation, which is Love's special case. The constructed algorithms are not economical in terms of implementation on a computer. Therefore, construction of algorithms for the complete calculation of flexible plates with a given degree of accuracy with allowance for the shear and inertia of rotation is becoming a topical issue. The problem of creating an automated inference system and solving the equations of the theory of elasticity and plasticity were first posed in the monograph by V.K. Kabulov. In this work, for the first time, the main problems of algorithmization are formulated and ways of their machine solution are outlined. The problem of algorithmization is solved as follows: depending on geometric characteristics of the object and physical properties of the material, a design scheme of this model is selected; derivation of the initial differential equations and the corresponding boundary and initial conditions; selection of a computational algorithm and numerical solution of the obtained equations; analysis of the obtained numerical results describing the stress-strain state of the structure under consideration. This work consists of an introduction, three sections and a conclusion. In the first paragraph, the equations of motion of rectangular plates are given. Substituting the expression for the force of moments and shearing forces and introducing a dimensionless value, a system of equations in displacements is obtained. In the second section, using the central difference formulas, a system of quasilinear ordinary differential equations is obtained. Taking into account the boundary and initial conditions, the system of equations is reduced to matrix form, which can be solved by the Runge-Kutta method. In the third paragraph, an analysis of the results obtained is presented.
Left-invariant para-Sasakian structure on the Heisenberg group
Authors:   Penza State University, Pan’zhenskii Vladimir I. , Rastrepina Anastasia O. ,   Penza State University
Published: May 2022

Among the eight three-dimensional Thurston geometries, there is the Heisenberg group, the nilpotent Lie group of real 3x3 matrices of a special form. It is known that this group has a left-invariant Sasakian structure. This article proves that there is also a paracontact metric structure on the Heisenberg group, which is also Sasakian. This group has a unique contact metric connection with skew-symmetric torsion, which is invariant under the group of automorphisms of the para-Sasakian structure. The discovered connection is proved to be a contact metric connection for any para-Sasakian structure. The concept of a connection compatible with the distribution is introduced. It is found that the Levi-Civita connection and the contact metric connection on the Heisenberg group endowed with a para-Sasakian structure are compatible with the contact distribution. Their orthogonal projections on this distribution determine the same truncated connection. It is proved that Levi-Civita contact geodesics and truncated geodesics coincide. It is found that contact geodesics are either straight lines lying in the contact planes or parabolas the orthogonal projections of which on the contact planes are straight lines. The results obtained in this article are also valid for the multidimensional Heisenberg group. AMS Mathematical Subject Classification: 53D10, 53C50
Computer modelling of the state of stress and strain of the Tunguska and Vilyui syneclises
Authors:   Institute of Strength Physics and Materials Science SB RAS, Akhmetov Ayan Zh. ,   Tomsk State University, Smolin Igor Yu. ,   Institute of Strength Physics and Materials Science SB RAS; Tomsk State University
Published: May 2022

The states of stress and strain are numerically analyzed under conditions of the geodynamic process of tension in the south part of the Vilyui syneclise and the middle part of the Tunguska syneclise. Two-dimensional models of geological structures of the south part of the Vilyui syneclise and the middle part of the Tunguska syneclise are constructed based on the Kimberlit-1981 geological profile obtained using deep seismic sounding. To describe the plastic strain in the geomedia, the model of elastic-plastic media with the non-associated plastic flow rule based on the Drucker-Prager-Nikolaevskii model is used. In this model, the “jelly sandwich” strength model is adopted for the analysis of the stress state of the lithosphere. The results of the numerical modeling of the state of the stress and strain of the chosen parts of the Siberian Craton are presented. The localization of plastic strain, the region of positive values of horizontal stresses, and the negative deviation of the calculated pressure from the lithostatic pressure correspond to mineral deposits.
Technique for the experimental determination of the force coefficient of the frontal co-resistance of unstable in flight bodies
Authors:   Tomsk State University (Tomsk, Russian Federation), Bimatov Vladimir I. , Kudentsov Vladimir Yu. ,   Omsk State Technical University, Trushlyakov Valery I. ,   Omsk State Technical University
Published: May 2022

One of the most important problems in the design of modern aircrafts is the study of the force effects of high-energy flows on the elements of their structures and on the aircraft as a whole. Aeroballistic installations are widely used as a research tool. Determination of the drag force coefficient is the main task of experimental ballistics from which aerodynamic studies begin. The studies are designed to determine the drag coefficient of missiles having different aerodynamic shapes, which can be used in rocket science, artillery, and other areas of technology involved in the study of the movement of bodies in gaseous and liquid media. A feature of the aeroballistic method for determining the coefficient of drag force is that, in order to obtain values of CXO of a given accuracy, experiments can be carried out only with bodies that are stable during the whole time of movement in the studied section of the trajectory. The research is aimed at solving the problem of calculating the drag coefficient of bodies using trajectory data on their coaxial movement. During the ballistic test, the body is sequentially photographed relative to a fixed coordinate system, coordinates of its characteristic points and the time between the moments of photographing are recorded, and the displacements of the characteristic points of the body relative to the moving coordinate system associated with the base body performing a rectilinear motion with a zero angle of attack, are simultaneously measured. In this case, the base body is axially and movably connected to the body under study. It is shown that the applied group motion effect allows, within the framework of the accepted assumptions, to increase the accuracy and simplify the determination of the drag force coefficient of bodies of a complex geometric shape.
Boundary state method in solving torsion problems for transversely isotropic bodies of revolution
Authors:   Lipetsk State Technical University, Ivanychev Dmitriy A.
Published: May 2022

The aim of this work is to develop the method of boundary states for the class of torsion problems as applied to transversely isotropic elastic bodies of revolution. Efforts, displacements, or a combination of both are used as twisting conditions at the border. Proceeding from the general solution to the problem of cross section warping, the basis of the space of internal states is formed. The search for an internal state is reduced to the study of the boundary state isomorphic to it. The solution is a Fourier series. The proposed technique is implemented in solving the first main problem for a body in the form of a truncated cone; the second main problem for a circular cylinder; and the main mixed problem for a non-canonical body of revolution. The solution was verified and the calculation accuracy was assessed. The obtained characteristics of the elastic field have a polynomial form. The elastic field in each problem satisfies the specified boundary conditions in the form of their distribution over the surface and does not satisfy them only in the integral sense.
Investigation of nonisothermal two-dimensional filtration in multylayer reservoir
Authors:   Bashkir State University, Islamov Denis F. , Ramazanov Ayrat Sh. ,   Bashkir State University
Published: May 2022

The problem of an unsteady temperature field during two-dimensional fluid filtration in a multilayer reservoir is investigated taking into account the barothermal effect, radial and vertical permeability inhomogeneities. The results of comparing the analytical and numerical calculations of the temperature changes of the fluid flowing from the reservoir for two various models of reservoir heterogeneity are presented. From the obtained results it follows that 1. The presence of radial inhomogeneity of permeability in the near-well zone of the layered formation leads to fluid flows between the layers, which affects the temperature change rate of the liquid flowing from individual layers. 2. Non-stationary temperature profiles over the thickness of the layered formation at low inflow times contain information about the flows between the layers due to radial inhomogeneity in the near-well zone of the formation. 3. Flows between layers lead to large errors in solving the inverse problem of estimating the distribution of permeability in the reservoir based on non-stationary temperature data. 4. The presence of flows between the layers does not exclude the possibility of estimating the radius of the contamination zone. 5. To correctly account for the influence of flows between layers when calculating the nonstationary temperature in a layered formation with a disturbed near-well zone, it is necessary either to use a two-dimensional numerical model of non-isothermal filtration or to change the algorithm for correcting the layer’s flow rate for short and long inflow times in the onedimensional analytical model.
APPLICATION OF MULTIHARMONIC NUMBERS FOR THE SYNTHESIS OF CLOSED FORMS OF PARAMETRICALLY MODIFIED FACTORIAL GENERATING SEQUENCES
Authors:   Moscow Power Engineering Institute, Statsenko I. V.
Published: May 2022

A toolkit and a method for reducing sequences of integers belonging to the class of factorial-generating recursions to a closed form are presented. The signs and properties of the modified factorial-generating recursion of one and two variables are determined. The best-known factorial-generating recursion of two variables is the sequence of Stirling numbers of the first kind. Modified hyperharmonic numbers are used to synthesize an analytical recursion model. The advantages of these numbers for constructing closed forms of factorial-generating recursions are revealed. An incomplete closed form of the sequence of Stirling numbers of the first kind is synthesized.
Kleptographic (algorithmic) backdoors in the RSA key generator
Authors:   Science and Technology Center “AlphaProject”, Markelova A. V.
Published: May 2022

The main types of algorithmic bookmarks are considered. A method for constructing asymmetric kleptographic bookmarks in the RSA key generator is presented, which allows the owner of the bookmark key (the developer or an authorized intelligence agency) to access a user key generated by an infected algorithm. Theorems illustrating the performance of the described algorithms are formulated, and the computational complexity of these algorithms is estimated. The resistance of the built tabs to some classes of attacks is demonstrated even if the adversary knows the methods used and has access to the source code of the key generator.
Image stegoanalysis using deep neural networks and heteroassociative integral transformations
Authors:   Voronezh State University, Dryuchenko M. A. , Sirota A. A. ,   Voronezh State University
Published: May 2022

The problem of steganalysis of digital images is considered. The proposed approach is based on the use of deep convolutional neural networks with a relatively simple architecture, distinguished by the use of additional layers of special processing. These networks are trained and used for steganalysis of small fragments of the original large images. For the analysis of full sized images, it is proposed to carry out secondary post-processing, which involves combining the obtained classification results in blocks as a sequence of binary features according to the scheme of a naive Bayesian classifier. We propose to use integral heteroassociative transformations that provide the selection of the estimated and stochastic (masking) components on the processed image fragment based on the forecast model of one part of the fragment in relation to another to identify violations of the structural and statistical image properties after message embedding. Such transformations are included in the architecture of trained neural networks as an additional layer. Alternative versions of deep neural network architectures (with and without an integral layer of heteroassociative transformation) are considered. The PPG-LIRMM-COLOR images base was used to create data sets. Experiments have been carried out for several well-known stego algorithms (including the classic block and block-spectral algorithms of Kutter, Koha - Zhao, modern algorithms EMD, MBEP and algorithms for adaptive spatial steganography WOW and S-UNIWARD) and for the stego algorithms based on the use of heteroassociative compression transformations. It is shown that the accuracy of steganalysis obtained when implementing the proposed information processing schemes for large images with relatively low computational costs is comparable to the results obtained by other authors, and in some cases even exceeds them.
Short single fault detection tests for logic networks under arbitrary faults of gates
Authors:   Keldysh Institute of Applied Mathematics, RAS, Popkov K. A.
Published: May 2022

It was proved that one can implement any non-constant Boolean function in n variables by an irredundant logic network in the basis {&, ⊕,¬}, allowing, when n ≥ 3, a single fault detection test with length not more than 6n - 10 relative to arbitrary faults of gates.
〈2〉-exponents of shift register transformations nonlinearity dipgraphs
Authors:   Financial University under the Government of the Russian Federation, Fomichev V. M. ,   Federal Research Center “Computer Science and Control”, RAS, Bobrov V. M. ,   National Research Nuclear University MEPhI (Moscow Engineering Physics Institute)
Published: May 2022

The matrix-graph approach is used to estimate the set of essential and non-linear variables of coordinate functions of the product of transformations of vector spaces. For essential variables, estimates are obtained by multiplying binary mixing matrices (or digraphs) of multiplied transformations, for non-linear variables - by multiplying ternary non-linearity matrices of multiplied transformations or their corresponding non-linearity digraphs, the arcs of which are labeled by the numbers of the set {0,1, 2}. For degrees of a given transformation, the area of non-trivial estimates is limited: for a set of essential variables, by the exponential of the mixing matrix (digraph); for a set of nonlinear variables, the 〈2〉-exponent of the matrix (digraph) of nonlinearity. For the class of transformations of binary shift registers, an attainable estimate of 〈2〉-exponents is obtained, expressed in terms of the length of the shift register and the set of numbers of essential and nonlinear variables of the feedback function. For register transformations whose non-linearity digraph has a loop, an exact formula for the 〈2〉-exponent is obtained. The results can be used to evaluate the nonlinearity characteristics of cryptographic functions built on the basis of iterations of register transformations.
Unique list colorability of the graph Кn2 + Kr
Authors:   Hanoi University for Natural Resources and Environment, Hung Le Xuan
Published: May 2022

Given a list L(v) for each vertex v, we say that the graph G is L-colorable if there is a proper vertex coloring of G, where each vertex v takes its color from L(v). The graph is uniquely k-list colorable if there is a list assignment L such that |L(v) | = k for every vertex v and the graph has exactly one L-coloring with these lists. If a graph G is not uniquely k-list colorable, we also say that G has property M(k). The least integer k such that G has the property M(k) is called the m-number of G, denoted by m(G). In this paper, we characterize the unique list colorability of the graph G = Kn2 + Kr. In particular, we determine the number m(G) of the graph G = Kn2 + Kr.