Theoretical Search Research Articles

Solutions of the natural electric potential for skew and polyhedral polarized bodies

Solutions for finding the natural electric potential from polarized oblique-angled (4-sided with complete asymmetry) and polyhedral electron-conducting bodies found in nature are performed. An oblique body is a layer with different angles of inclination of its upper edge and side faces, i.e. a body that has complete asymmetry. A theoretical search of various combinations of the angles of inclination of the faces and the lengths of these faces allows you to select an anomaly of the electric potential for tetrahedral bodies of any complexity. A polyhedral body is an 8-sided one that approximates a sphere fairly accurately at a distance of one or more internal radii from its surface. Solutions for polarized oblique-angled (4-sided) and polyhedral electronconducting bodies are tested on examples of interpretation of anomalies of the natural electric potential observed over real ore objects. As a result, the solutions obtained expand the possibilities of the natural electric field method in solving inversion problems and, thereby, increase its efficiency.

Modelling searching on academic social networking sites: a focus on learning outcomes

PurposeThis paper aims to establish a theoretical search model on academic social networking sites (ASNSs).Design/methodology/approachBased on the characteristics of ASNSs and a previous extended sense-making model, this paper first presented an initial model of searching on ASNSs. Next, an online survey was conducted on ResearchGate to understand the search processes and outcomes with the help of a survey questionnaire. In total, 359 participants from 70 countries participated in this online survey. The survey results provided a basis for modifying the initial model.FindingsResults showed that the theoretical model of searching on ASNSs included motives for searching on ASNSs, identification of needs, search triggered by information needs, search triggered by social needs and outcomes. The search triggered by information needs was significantly positively correlated with learning outcomes. Besides learning outcomes, searching on ASNSs could help user amplify their social networks and promote research dissemination.Practical implicationsUnderstanding users’ search habits and knowledge acquisition can provide insights for ASNSs to design an interface to support searching and enhance learning. Moreover, the proposed model can help users recognize their knowledge status and learning effects and improve their learning efficiency.Originality/valueThis paper contributes to establishing a theoretical model to understand users’ search process and outcomes on ASNSs.

Conformational Landscape of the Hydrogen-Bonded 1-Phenyl-2,2,2-Trilfuoroethanol···1,4-Dioxane Complex: Dispersion Interactions and Conformational Conversion

A rotational spectrum of the hydrogen-bonded complex between 1-phenyl-2,2,2-trilfuoroethanol (PhTFE), a chiral fluoroalcohol, and 1,4-dioxane, a common solvent for organic reactions, was measured using a chirped pulse Fourier transform microwave spectrometer. Initial theoretical conformational searches were carried out using CREST, a recently developed conformational searching tool. Subsequent geometry optimization and harmonic frequency calculations at the B3LYP-D3(BJ)/def2-TZVP level of theory yielded nearly 30 binary conformers of which 13 are within an energy window of ∼5 kJ mol-1. Interestingly, while the O-H···O hydrogen bond dominates the attractive binary interactions, the complex conformational landscape is mainly controlled by subtle dispersion interactions between the phenyl and 1,4-dioxane rings. Two sets of rotational transitions were assigned in the experimental spectrum and attributed to the two most stable conformers of PhTFE···1,4-dioxane. The quantum theory of atoms in molecules (QTAIM), noncovalent interactions (NCI), and symmetry-adapted perturbation theory (SAPT) analyses were employed in order to appreciate how the phenyl ring and O-H functional groups influence the intermolecular interaction and conformational distribution of the binary complex. The main PhTFE conformation within the complex, identified experimentally, is different from that of the isolated PhTFE monomer reported previously.

Negative Latin square type partial difference sets in nonabelian groups of order 64

There exist few examples of negative Latin square type partial difference sets (NLST PDSs) in nonabelian groups. We present a list of 176 inequivalent NLST PDSs in 48 nonisomorphic, nonabelian groups of order 64. These NLST PDSs form 8 nonisomorphic strongly regular graphs. These PDSs were constructed using a combination of theoretical techniques and computer search, both of which are described. The search was run exhaustively on 212/267 nonisomorphic groups of order 64.

On the definition of the concept of “payment system” in the context of changes of the current legislation of Ukraine

Problem setting. Increasing the value of cashless payments and strengthening the role of heterogeneous payment systems in recent years, especially in the conditions of quarantine restrictions related to the coronavirus disease of COVID19, has become a clear and unconditional trend in the field of economic relations. Profound changes in the organization of calculations caused by the rapid development of information and telecommunication technologies, as well as the processes of globalization, lead to the need for new scientific research on the problems of legal regulation of payment systems, since, unfortunately, theoretical achievements in this area lose their relevance due to the high dynamics of the changing economic and socio-political conditions. Against this background, recent changes in the current legislation of Ukraine require their detailed analysis and awareness, and therefore the revision of certain fundamental views, including the definition of the concept of “payment system.” Analysis of resent researches and publications. The study of payment systems as an immanent component of the economic sphere has its own history and specifics. They were studied both from the position of economic theory, and became the subject of scientific searches of representatives of legal science. Some issues of essence, organization and functioning of modern payment systems have been the subject of scientific interest as domestic, and foreign economists, including Woodford M., Gerasimova S., Grytsenko A.A., Gross D., Demkivskyi A.V., Issing O., Koval I.M., Lukyanov V.S., Movchan O.A., Olifirenko M.M., Senyshchiv P.M. Their theoretical achievements are the foundation of understanding the peculiarities of legal regulation of heterogeneous calculation relations in modern economy. Lay the foundations for creating a holistic theory of settlement legal relations, and also contribute to the formation of the concept of payment law. Target of research is to update the issue of the essence and concept of the «payment system,» as well as to highlight the peculiarities of the transformation of the defining features of such an object of legal regulation in the conditions of systemic changes in the special legislation of Ukraine. Article’s main body. The article considers the problem of defining the concept of “payment system” in the conditions of radical change of the special legislation of Ukraine on the organization of settlement relations. It emphasizes the lack of a generally accepted scientific approach in the question of determining the concept and essence of the payment system, emphasizes the presence of a broad discussion on such a problem. Attention is drawn to the shift of emphasis in determining the essence of the payment system from the transfer of funds to the provision of payment services. The author’s definition of the payment system as a legal form of payment services provision is proposed. Conclusions and prospects for the development. There is a wide discussion in scientific circles about the definition of the “payment system” until now has not finally solved such a problem. Attempts to overcome disagreements in determining the essence of the concept of “payment system” in the general sense did not lead to the unification of existing scientific approaches. At the same time, such theoretical searches provided an opportunity to evaluate the phenomenon from the perspective of ideas about its essence, content and form.

Combination of Empirical and Theoretical Knowledge as a Problem of Piano Pedagogy of Ukraine

Professional training of specialists in the field of musical art is an urgent task, as it contributes to the development of a performing and pedagogical culture, which is reflected in the understanding of a musical composition. High-quality music education ensures continuous professional and creative development. The purpose of the study is to determine the basic principles of combining empirical and theoretical knowledge in the educational process for training future musicians and pianists. The main methodological base of the study consists of: methods of theoretical (monographic, abstraction, and concretisation) and empirical (analysis, content analysis, generalisation of pedagogical experience, experiment) search. The study considers the main principles and trends in the development of modern piano pedagogy in Ukraine. The essence of the concepts of empirical and theoretical cognition in the context of the educational process is analysed and the features of their possible application in piano pedagogy are identified. An educational process model for training future pianists is proposed, which would allow providing favourable conditions for the development of a creative personality, better performing skills, and an independent professional performer. It is established that the specific features of piano pedagogy condition the need to adapt modern educational methods to the conditions of the educational process in the context of obtaining music education. As a result, during the application of the model for organising the teaching of piano art, which provides for the unity of theoretical and empirical cognition, the principles on which such a model should be based were identified. The practical value of the study lies in the fact that the development of a model for combining methods of theoretical and empirical cognition in the educational process of piano art students is proposed

Selective hydroboration of terminal alkynes catalyzed by heterometallic clusters with uranium–metal triple bonds

Selective hydroboration of terminal alkynes catalyzed by heterometallic clusters with uranium–metal triple bonds

Early Intervention in Autism Spectrum Disorder

Abstract. Early intervention in autism has become possible with the identification of this disorder at earlier ages, but the scientific production on this subject is still very incipient. The present study aimed to characterize scientific production in Brazil regarding early intervention in the Autism Spectrum Disorder (ASD), resorting to the database of the Capes Journal Platform ( Plataforma de Periódicos Capes). The procedure used for the theoretical search was an integrative literature review. The discussion on the analysis of the review occurred with the inclusion of articles published in Portuguese, between 2001 and 2020, with the keywords: “intervention”, “early” and “autism.” As a result, a total of 83 texts were found. Of this total, 65 articles were published in peer-reviewed journals and made available as an online resource on the Capes Journal Platform. In the next phase of data analysis, we decided to categorize the articles included in the search process ( N = 25), based on the following categories: “autism” (19) and “early autism intervention” (6). A very low percentage of publications related to this topic were identified in the search universe, although an increase in studies has been observed in recent years. Nonetheless, we concluded that the six articles on early intervention agree that the sooner the disorder is diagnosed and the child is stimulated, the greater the effectiveness in the development of communication and language, as well as social interaction.

The The Relationship Between School Heads’ Transformational and Structural Leadership Styles Towards Teachers’ Teaching Motivation

Abstract: Leadership is crucial in an organisation’s long-term viability and incredibly motivating teachers. Theoretical and conceptual searches for leadership styles that work in any situation, such as teachers’ teaching motivation and with any set of followers, have never been more abundant in the field of leadership research. However, some findings reported that there had been some uncertainty about the relationship of leadership styles towards teacher teaching motivation in some schools. Hence, this study is designed to get the response of primary school teachers in Sabah on the school heads’ transformational and structural leadership styles, the level of teachers’ teaching motivation, and the relationship between the school heads’ transformational and structural leadership styles towards teachers’ teaching motivation. This study is a descriptive quantitative study conducted through a survey using a questionnaire from the instruments of L. Bolman Personnel correspondents for structural leadership style, MLQ (Multi-Factor Leadership Questionnaire) for transformational leadership style, and A Questionnaire Measure of Individual Differences in Achieving Tendency (QMAT) for teaching motivation. The study involved 350 respondents from primary schools in Sabah. The analysis of the findings uses frequency, percentage, mean, standard deviation, and Pearson correlation analysis with determination = 0.05. The results showed that teachers’ response in primary school in Sabah to the leadership style of the school heads is at a satisfactory level. The study also found a significant relationship between the school heads’ leadership styles towards teachers’ teaching motivation. This study supports the findings of other studies, whereby the headmaster leadership styles influence teachers’ level of teaching motivation in schools.
 
 Keywords: Transformational leadership styles, structural leadership styles, teachers’ motivation

Sculptural rhymes of Art Nouveau: on the visual poetics of symbolism

This article is first within the Russian and Western art history to examine the concept of visual poetics as a separate subject of research. Based on the analysis of iconographic and theoretical searches of the masters of symbolism, which found reflection within the boundaries of expressive means of visual art, the author comes concludes on the poetic principles of symbolist artists as the fundamental sources of the formation of the style of Art Nouveau – a new sculptural language of the XIX – early XX centuries. Detail characteristic of the philosophical-aesthetic content that underlies optical forms of the visual symbolist image, in its scientific origins leans on the capabilities of the art comparative-formal analysis, as well as iconological method adapted to the period under review. The innovative conceptual approach towards studying the art of symbolism lies in the fact that poetry as the concept is depicted beyond the literary sphere, as a specific type of artistic worldview that influenced the development of the visual language of art in the era of Art Nouveau. At the same time, visual poetics is compared to the complex system of internal images, which shape in with the works of the master throughout the entire path of his self-expression, and are directly related to profoundness of the poetic principle of the soul, lyrical and metaphorical intuition of the artist. This approach allows us broadening the representation on the aesthetic benchmarks of the symbolist artists, as well as designating the new methodological coordinates in the field of studying the art of symbolism in both national and international contexts.

Strain-tunable magnetic and electronic properties of a CuCl3 monolayer.

Recently, theoretical search has found that a two-dimensional CuCl3 monolayer is a ferromagnetic semiconductor. Here, we apply density functional theory to study its geometrical structure, magnetic and electronic properties under the influence of a biaxial strain ε. It is found that the CuCl3 monolayer exhibits ferromagnetic ordering at the ground state with ε = 0 and its Curie temperature increases monotonously with respect to the biaxial strain, which can be increased to about 100 K at 10% tensile strain. When a compressive strain of about 6.8% is applied, a transition from the ferromagnetic to the antiferromagnetic state occurs. In addition to the transition of the magnetic ground state, the electronic band gaps of spin-up and spin-down electrons undergo direct-indirect and indirect-direct-indirect transitions at the tensile strains, respectively. The tunable magnetic and electronic properties investigated in this work are helpful in understanding the magnetism in the CuCl3 monolayer, which is useful for the design of spintronic devices based on ferromagnetic semiconductors.

Дзига Вертов и Сергей Эйзенштейн: к истории соперничества

The creative сompetiton between the main Soviet directors of the 1920s, Dziga Vertov and Sergei Eisenstein, played a decisive role in the development of Soviet cinema. The opposition between “documentary” and “fictional” gave birth to discussions the “truth” on the screen. Is it possible to express true “life by surprise” in a film, or it the viewer should be influenced politically in the new Soviet art, he should be involved in the historical process via screen performance, an artistic method. Directors were often compared and opposed to each other, and their rivalry often became the basis for their own theoretical and stylistic searches. The article deals with a number of episodes and motives of the conflict between two masters. Previously unpublished archival documents are introduced into scientific circulation, which complete the picture of their relationship. The author comes to the conclusion that many creative points, in particular, while working on the film Man with a Movie Camera, were caused by Vertov’s rivalry and jealousy for Eisenstein’s success. While for the director of Battleship Potemkin, addressing the experience of Cine-Eye played one of the key roles in the process of formulating his film editing theory.

Some Observations on Lazy FSCA and its Performance Bounds

Greedy search algorithms are a practical approach to approximating the solution of optimal subset selection problems, such as selecting the optimum model inputs from a set of candidate features. When a submodularity property holds for the feature selection metric, an efficient ‘lazy’ implementation can be employed. Recently, the authors have shown that a lazy implementation of Forward Selection Component Analysis (Lazy FSCA) yields comparable performance to FSCA, even though its selection metric (variance explained) is not submodular. In this paper we empirically investigate the sensitivity of Lazy FSCA to submodularity violations and provide a comparative assessment of a number of theoretical greedy search performance bounds that apply to FSCA. Using a diverse range of real world datasets and extensive Monte Carlo simulations we show that even though violations in submodularity can be frequent, the impact on variance explained tends to be minimal. This is true even when there are large deviations in the sequence of selected variables, which can arise with highly correlated datasets. In addition, the available performance bounds are shown to be very conservative and a poor reflection of the true performance of FSCA/Lazy FSCA.

CHARACTER BUILDING POTENTIAL OF SRH-TECHNOLOGY UNDER CONDITIONS OF A COMPREHENSIVE SCHOOL

The purpose of the article is to reveal the possibilities of SRH-technology in the implementation of the educational process in a secondary school. Theoretical and practical research methods were used in the research search, includ- ing analysis, comparison and generalization of scientific and pedagogical materials, modeling of processes taking into account the uncertainty factor. The method of expert assessments, the method of vector preferences and the method of focal objects were used to identify trends and countertrends of education in the context of global chal- lenges of our time. The results of the theoretical and empirical search were the identification of the features of the use of SRH-technology for the organization of the educational process in a secondary school. The theoretical sig- nificance of the work consists in clarifying the methodological characteristics of the use of SRH-technology in the implementation of the educational process in a secondary school. The practical significance of the work lies in the disclosure of ways to use SRH-technology in educational work at school.

ДЕРЖАВНА ПРИКОРДОННА СЛУЖБА УКРАЇНИ ЯК СУБ’ЄКТ ЗАБЕЗПЕЧЕННЯ НАЦІОНАЛЬНОЇ, ДЕРЖАВНОЇ, ПРИКОРДОННОЇ БЕЗПЕКИ ТА БЕЗПЕКИ ДЕРЖАВНОГО КОРДОНУ

The purpose of the article is to determine the features of ensuring national, state border security and the security of the state border in the aspect of the functioning of the State Border Guard Service of Ukraine. The article substantiates that the importance of a logical and consistent definition of the scope of competence of the State Border Guard Service of Ukraine is due to the need to thoroughly determine the legal status of each subject of the security and defense sector, especially under the legal regime of martial law. The category of the state border is a city-forming one, which makes it possible to preserve the objectivity of the theoretical search and the consistency of doctrinal developments. It is concluded that the activity of the State Border Guard Service of Ukraine is an element of ensuring national security. Thus, national security acts as a supersystem for systems of the lower level - state security and security of the state border. In turn, border security is a subsystem of state border security as one of the vectors of activity of the State Border Guard Service of Ukraine. The rationale is given that the importance of the functions assigned to the State Border Guard Service of Ukraine necessitates a distinction between four types of security, each of which is within the competence of this entity. Arguments are given that the distinction should be based on understandable and logical criteria, which, in this case, are the levels of security (this allows us to distinguish national security from state security) and the content of security measures (due to this, we can distinguish between state border security and border security). The conclusion is made that the directions for further scientific research should be the preparation of proposals for improving the terminology of legislative and subordinate legal acts regulating the activities of the State Border Guard Service of Ukraine, in the aspect of delimitation from each other between different types of security.

THE EFFECTIVENESS OF PUBLIC AUTHORITIES ACTIVITY: ECONOMIC DIMENSIONS IN THE CONDITIONS OF MUNICIPAL ENTITY

Objective. The objective of the article is to research modern approaches to the effectiveness of public authorities and the peculiarities of their economic assessment at the local level. Methods. The methods of theoretical search, analysis and synthesis, systematization and generalization, scientific abstraction, tabular method, and statistical research methods (for determining economic efficiency indicators) were used in the performance of this scientific research. Results. Based on the theoretical generalization of the approaches of Ukrainian scientists regarding the definition of the categories "management efficiency", "effectiveness" and "efficiency" in relation to the activities of public authorities (accepted for the state and municipal level as a single interpretation), it is determined that it is managerial, social, economic and political a category determined by the influence of the subject of management on the object of management with the aim of achieving the set goal (result), in which the object of management moves to a new state with the optimal use of resources needed to support such a transition. As a methodological basis, the work implements a mixed approach to evaluation, which is a compilation of the composite approach (which aims to determine the degree of influence of managerial work on the performance of the government body as a whole) and the multiple approach (which is an attempt to evaluate efficiency using generalizing indicators). With its use, an assessment of the economic efficiency of the municipal authorities of the city of Kryvyi Rih was carried out. By means of the analysis of indicators of resource strategic efficiency and general indicators of economic efficiency of public authorities (municipal authorities) of the city of Kryvyi Rih in 2019-2021, a high level of efficiency was ascertained, which ensures the return of all available resources of the territorial community and meets the goals of regional development and strategic interests of the state.

Питання Криму в українських геополітичних доктринах першої половини ХХ сторіччя

The article is devoted to the analysis of the coverage of the Crimea issue for the existence and development of Ukrainian statehood in the geopolitical teachings of Ukrainian thinkers of the first half of the twentieth century. For them, the "Crimean issue" is part of the theoretical search for geopolitical directions of Ukraine’s development in the past, present and in the future. It is emphasized that the consideration of the geographical factor as an important factor in politics has a significant historical tradition. It is noted that Ukrainian geopolitical theorists of the first half of the twentieth century assumed that the conquest of the northern Black Sea coast provided Ukraine with access to the communication space in terms of defense, political interaction with its partners and trade and economic ties. It is noted that the works analyzed in this article state that the geopolitical significance of the Crimean peninsula, the Black Sea area and the Ukrainian lands is virtually unchanged in different historical epochs from antiquity to the events of the early twentieth century. It is noted that the loss of Crimea in 1918 was seen by Ukrainian geopolitical thought of the first half of the twentieth century as a strategic defeat, which was due, among other things, to the quality of the then domestic political elite and its lack of fundamental geopolitical knowledge. At the same time, thinkers draw attention to the fact that the then political partners of the young Ukrainian state were guided in their actions, primarily on the basis of their own national geopolitical interests. It is concluded that the theoretical work of representatives of Ukrainian political thought of the first half of the twentieth century in the situation around Ukraine and throughout the Eastern European region, including the issue of deoccupation and return of the Crimean peninsula to Ukrainian jurisdiction.

РЕЗОНАНСНИЙ ПІДСИЛЮВАЧ АКТИВНОЇ ЕЛЕКТРИЧНОЇ ПОТУЖНОСТІ. ПРОПОЗИЦІЯ, АНАЛІЗ, ЧИСЛОВІ ОЦІНКИ

The purpose of this work is to substantiate the real effectiveness of the proposed active electric power resonant amplifier circuit, represented by a sequence of four inductively coupled active-reactive circuits. The first of them is the input with a source of a harmonic signal to be amplified. The second one generates amplified reactive power in the voltage resonance mode. The third one carries out theoutput of power from the second circuit without the reverse influence of the amplification processes with an additional third-party voltage source in the current resonance mode. The fourth circuit inductively connected to the third circuit contains an output load -a resistor that simulates the release of amplified active power. The analysis and numerical assessments of the characteristics of the processes in the proposed scheme of the resonant amplifier of active electric powermade it possible to substantiate its fundamental capability. Quantitative estimates for the experimental model made it possible to give recommendations on the choice of the parameters of the circuit elements of the resonant amplifier, which has sufficiently high efficiency indicators for low-resistance output active loads.The results obtained are based on the conclusions of a generalized theoretical analysis of electromagnetic processes and numerical estimates for its experimental implementation.The proposed scheme for the resonantamplification of active electric power, the rationale for its fundamental effectiveness, the theory and numerical assessments of the characteristics of the ongoing processes are of practical interest for further experimental studies, as well as for formulating recommendations for the manufacture of operating samples of this proposal are very promising directions. The results of the conducted research are seen as a theoretical search for the conditions for the highest efficiency and an experimental study ofelectromagnetic processes in the proposed circuit of a resonant amplifier of active electric power.

Theoretical search of a simple characteristic for long-lived organic room-temperature phosphorescence materials with H aggregation

In RTP crystals, the overlapping area between H-aggregated planar dimer exhibits strong correlation with the physical parameters characterizing the RTP performance.

Sungmoon Kim’s Democracy After Virtue

Sungmoon Kim’s <i>Democracy After Virtue</i>