bluuebunny/crossref_metadata_2025_split huggingface dataset:
Durability Challenges of Low-Grade Calcined Clay Opposed to High-Volume Fly Ash in General Purpose Concrete
Authors: Flegar Matea , Ram Kiran , Serdar Marijana , Bosnar Klara , Scrivener Karen 
Published: June 2023

Abstract
With the decrease in availability of common supplementary cementitious materials (SCMs) such as fly ash in Europe, the search for appropriate SCMs should be dealt with locally. A combination of abundant low-grade calcined clay and limestone powder has proven relatively inexpensive to produce while maintaining satisfying performance compared to existing cements. In this study, ternary cement mixtures containing 45 % ordinary portland cement and 55 % SCMs - limestone powder with either low-grade calcined clay or high-volume fly ash (HVFA), were compared in terms of freeze–thaw resistance, water permeability, carbonation, and compressive strength of concrete according to European standards. The main aim of the study was the evaluation of potential durability challenges of local limestone and calcined clay (LC3) binder and the possibility of its utilization as an ecological alternative to HVFA blends fitted for general application. The results suggest a similar performance of both binders in terms of compressive strength, carbonation, and freezing and thawing resistance, though the water penetration resistance seems to increase with the LC3 binder. The reduced water-permeable porosity of this binder, measured by mercury porosimetry, could influence the diffusivity of concrete, especially after carbonation.
Marginal fit of milled versus different 3D-printed materials for provisional fixed dental prostheses: an in vitro comparative study
Authors: Igreț Anca , Rotar Raul Nicolae , Ille Codruța , Topală Florin , Jivănescu Anca 
Published: June 2023

Introduction. Provisional dental prostheses are used as interim restorations to help patients perform oral functions between the time of tooth preparation and the placement of the final restoration. A provisional dental prosthesis should protect the abutment from pulpal and gingival aggressions, adapt correctly to keep healthy gingival tissues, be durable, and have a low price. The purpose of this in vitro study was to compare the marginal adaptation of different types of provisional fixed dental prostheses (PFDP), fabricated using 3D printing technology versus the milling (computer-aided manufacturing [CAM]) technique.
Method. Two resin teeth (second premolar and second molar) on a typodont were prepared for three-unit provisional fixed dental prostheses. Thirty models were 3D-printed after a digital model was created using an intraoral scanner. Then, 30 provisional fixed dental prostheses (PFDPs) were made from a variety of materials using a digital design of a 3-unit PFDP and STL files delivered to a milling machine and a 3D printer, respectively. Ten PFDP were milled (CAM), and two sets of ten each, were fabricated with 3D printing technology (stereolithography), using two different materials. All restorations were analyzed under a microscope, and marginal gap was then measured using the software Image J.
Results. The milled group presented the best marginal gap values (ranging from 86 to 108 μm) and a median value of 93 μm, followed by GC group with (110-251 μm) with a median value of 205 μm and the PR group with median value of 316.5 μm.
Conclusion. According to the findings of this in vitro study, the milling (CAM) technique and SLA technology provides acceptable marginal fit values to fabricate provisional fixed partial dentures.
Establishment of technologically feasible modes of electrocoagulation purification of wastewater from nickel ions
Authors: Helesh Andriy , Mudrynets Petro , Kalymon Yaroslav , Kindzera Diana , Hnativ Vira 
Published: June 2023

The object of research is the technology of electrochemical purification of wastewater from heavy metal ions. The work, in particular, is devoted to the purification of effluents with a low concentration of the Nickel ion. The main task of the experimental research was to select the material of the electrodes and the mode of electrochemical dissolution of the anodes, under which the efficiency of wastewater purification will be maximum, as well as to confirm the practical possibility of deep purification of the specified wastewater to the standards that correspond to the maximum permissible concentrations (MPCNi=0.5 mg/dm3).
It was established that in the process of electrocoagulation wastewater purification there is an induction period (10 min), during which the coagulant accumulates in the electrolyzer and the degree of purification increases sharply. As a result of an increase in the current density from 10 A/m2 to 20 A/m2, the degree of purification on iron electrodes increased from 60 to 84% for a process duration of 20 minutes. This is explained by the intensification of the anodic dissolution of the metal and the increase in the concentration of Fe(OH)3. Increasing the current density to 30 A/m2 practically does not affect the degree of purification, which is explained by the phenomenon of polarization of the anodes and is confirmed by the increase in the process voltage from 2.40 V (10 A/m2) to 12.59 V (30 A/m2). Therefore, it is impractical to increase the current density in the future. For iron anodes, it was not possible to achieve the required degree of purification (≥98.3 %), the maximum degree of purification did not exceed 85 %, and the content of Ni2+ ions in purified water exceeds the MPC by an order of magnitude.
It was experimentally established that it is advisable to use aluminum electrodes for the process of electrocoagulation purification of wastewater from Nickel ions. At a current density of 20 A/m 2 and process duration of 40 minutes, the concentration of Ni2+ ions did not exceed the MPC of Ni. When using aluminum electrodes, an increase in the current density from 15 A/m2 to 20 A/m2 does not lead to polarization of the electrodes, and the process in both cases takes place at a steady state at a voltage of ~6.7 V. The technologically appropriate operating mode of the electrolyzer is chosen: aluminum electrodes at an anodic current density 20 A/m2 and the duration of the purification process – ≥40 min. The obtained results can find practical use in the design of waste water purification systems of galvanic industries.
Eine systematische Bewertung der Qualität von Simulationsmodellen
Authors: Barth Mike , Ristic Mirjana , Jäkel Jens 
Published: June 2023

Die Bewertung und Spezifikation der Qualität von Simulationsmodellen bilden einen wesentlichen Aspekt für ein professionelles und zeitgemäßes modellbasiertes Engineering. Auch aktuell entwickelte digitale Geschäftsmodelle bauen auf die Integration sowie die Weitergabe und monetäre Abrechnung von Simulationsmodellen mit Kunden - entweder als integrativer Teil eines Produktes oder als ein eigenständiges digitales Produkt. Im ersten Teil dieser Beitragsreihe „Identifikation und Clustering von Qualitätskriterien“ (atp magazin 6/7-2020) wurden Attribute identifiziert, die als maßgebliche Grundlage für die Bewertung der Qualität von Simulationsmodellen dienen. Im zweiten Teil „Bewertungsmetrik und Validierung“ (atp magazin 4/2021) wurden unterschiedliche Bewertungsmechanismen eingeführt, mit deren Hilfe eine quantifizierte Einordnung in unterschiedliche Qualitätsniveaus möglich wird. In diesem dritten Beitragsteil werden verschiedene Rollen definiert, die im Laufe des Lebenszyklus von Simulationsmodellen und deren Qualitätsbewertung relevant werden. Dabei liegt der Fokus auf der jeweiligen Anwendung der Metrik.
Remote Performance of a Labor Function by an Employee: Problems of Theory and Law Enforcement
Authors: Shonia G. V. 
Published: June 2023

Periodic bursts of deterioration of the sanitary and epidemiological situation in certain regions and in Russia as a whole make remote performance of a labor function by an employee relevant and in demand. The remote format of work increases economic profitability of the employer’s activities. Transition to remote work is not a formal change of the place of performance of the labor function, it involves a significant organizational and local regulatory restructuring.Mandatory and optional transfer to a remote form of work involves the inclusion of certain terms in the employment contract, as well as in additional agreements to the employment contract. The classical rules of interaction between an employee and an employer are not applicable for the remote exercise of the labor function. Prior to the conclusion of employment contracts with remote employees of the employer organization, it is recommended that local regulations be developed and published for all the employees to read them. It is important to note that the employee must acknowledge by signing that he has read each local regulatory act.The work of a remote employee means certain specifics of his interaction with the employer, including the use of electronic document circulation system and electronic digital signature.Traditional approaches to determining the working time and rest time of a remote worker are also inapplicable. Such an employee independently and under his own responsibility chooses the mode of work depending on the tasks periodically given by the employer. It is impossible to apply the classical grounds to terminate an employment contract concluded with a remote employee, since it seems necessary to take into account the specifics of the remote labor function.In the doctrine and law enforcement practice, there is no uniform approach to solving problems related to the remote exercise of a labor function, the interaction between a remote employee and an employer. Based on the analysis of current provisions of labor and information legislation, judicial and business practice, conclusions and recommendations are made in the article regarding the solution of problems related to the conclusion and termination of an employment contract with a remote employee, as well as regarding the documents supporting the contract.
Certain Bioethical Aspects of Personal Dignity in Genomics
Authors: Krylatova I. Yu. 
Published: June 2023

The paper deals with the constitutionalism and constitutionalization of certain provisions of genomics and bioethics at the present stage. The author analyzes constitutional domestic and foreign normative acts, the subject of which are relations in the field of genomics and the correlation of these relations with bioethics. The paper presents the opinions of Russian and foreign scientists regarding bioethics and related phenomena. The paper examines individual bioethical aspects, potential risks and threats, and searches for elements of the scientific concept of bioethical and somatic dignity of the individual in Russian legislation. The paper discusses the general issues of the legal regime of the human genome and the issues of genetic, genomic, biomedical research. The author raises the question of the balance of private and public interests as an optimal combination of personal interest and scientific ones. Having studied the legislation, the author speaks about the need to legally consolidate the definition of the concepts «genetic research with human participation» and «genomic research with human participation» at the federal level. The author expresses the opinion that the introduction of this conceptual apparatus into medical legislation would help to unify value-based legal approaches and models of legal regulation, and would also be the most important guarantee of the inviolability of human somatic dignity, eliminating unjustified risk and potential threats of subsequent biomedical research and experiments with human participation.The author concludes: the categories of bioethical and somatic dignity require further disclosure in Russian legislation and state policy in the field of biomedicine.
Santi Romano and the Concept of Legal Pluralism
Authors: Biryukov S. V. 
Published: June 2023

The paper considers the significance of the work of the Italian lawyer Santi Romano «Law and Order» (1917–1918) for the formation and development of the concept of legal pluralism. The author’s conclusions related to the theory of multiple institutions--the rule of law in society--are analyzed. The paper reveals thecorrelation of S. Romano’s theses with the views of the representatives of the St. Petersburg school of Philosophy of law (S.I. Gessen, L.I. Petrazhitskiy, P.A. Sorokin, G.D. Gurvich), the views of L. Dugi, M. Oriu, O. Ehrlich, M. Weber. It is established that S. Romano can be considered a harbinger of modern studies of legal pluralism within the framework of legal anthropology, the direction of «law and globalization». His ideas also intersect with the concepts of «direct social law», «shadow law», highlighted in the Soviet and Russian theory of state and law. The author raises the question about the veracity of S. Romano’s certain statements about the concept of legal pluralism as a whole. It is noted that contrary to the opinion of the author of «Law and Order», not every organized social group has its own law, and the state can block the emergence of informal law, change the structure of society. It is argued that legal pluralism manifests itself not only in the multiplicity of legal systems (legal orders), but also in the reflection of the interests and values of different subjects within specific legal systems. At the same time, the very possibility of the emergence of informal law and the more general fact of the coexistence of various systems (subsystems) of law in modern society are confirmed.It is concluded that the general significance of S. Romano’s work and other similar studies lies in attempts to theoretically substantiate the relationship between social pluralism, social competition on the one hand and legal pluralism on the other. Despite some shortcomings of these works and the need to clarify the understanding of legal pluralism, this relationship itself is indisputable, and the relevant research is important and relevant.
Direct Image Dissimilarity Inversion of Ambient Noise Multimodal Dispersion Spectrograms
Authors: Liu Qi , Chen Xiaofei , Gao Lina , Yu Zhenjiang , Chen Juqing 
Published: June 2023

ABSTRACT
The frequency–Bessel transform (F–J) method, which can reliably provide multimodal surface-wave dispersion spectrograms from recorded ambient noise, has been applied in many studies of the earth’s velocity structure. However, extracting dispersion curves and determining their roots can be challenging. To circumvent these challenges, we present a new, objective spectrum inversion scheme for multimodal dispersion spectrograms. In our new method, the image dissimilarity between the observed dispersion spectrogram and the synthetic kernel spectrum of Green’s function is directly minimized to invert the subsurface velocity structure by a quasi-Newton method. During the spectrum inversion, Green’s kernel spectrum and its derivatives are efficiently calculated by the generalized reflection and transmission coefficient method. Thus, we can rapidly perform structure inversion for multimodal dispersion spectrograms. Finally, the reliability and practicality of the new method are validated by synthetic and field applications, respectively.
Territorial diagnostics and citizen perception of municipal public management, towards an efficient reform of Local Administration
Authors: Del Campo Villares Manuel Octavio , Ferreiro Seoane Francisco Jesús , Jardón Ferreiro Eladio , Molina Picazo Miguel 
Published: June 2023

Spain has a population distribution dispersed in small population centres where 60% of municipalities have less than 1,000 inhabitants. This situation generates a financial and functional incapacity to guarantee the successful and efficient provision of local public services. In order to fulfil its competences and improve services, a territorial diagnosis of the investigated area is necessary to adapt the size and structure of its administration. However, the social superstructure is reluctant to change the form of administrative action, despite being perceived as slow and bureaucratic by citizens. For this reason, this work proposes a reform to improve local economic and financial management by redesigning its administrative structure, thus achieving citizen recognition of the advantages of change. The proposal is developed through a computerised reporting model for public decision-making, the result of which is a systematic spatial report of administrative-financial decisions, which optimises decision-making and makes public management more visible.
МЕХАНІЗМ ДЕРЖАВНОГО РЕГУЛЮВАННЯ ВІДТВОРЕННЯ ТА РОЗВИТКУ ЕКОНОМІКИ УКРАЇНИ В РИНКОВИХ УМОВАХ
Authors: Дикань В. Л. , Толстова А. В. 
Published: June 2023

В статті розглянуто питання державного регулювання економіки країни на етапі відтворення. Сталого економічного розвитку країни запропоновано досягти за рахунок створення спеціальних економічних зон та індустріально-технологічних багатогалузевих парків з індустріальним, логістичним, комерційним, освітнім, агротехнологічним і науковими кластерами. Визначено комплекс взаємопов’язаних та взаємоузгоджених методів, форм, засобів, інструментів та принципів регулювання економіки, які формують механізм державного регулювання економіки на етапі відтворення.
ДЕРЖАВНЕ РЕГУЛЮВАННЯ ПЛАТІЖНИХ СИСТЕМ
Authors: Українська Л. О. 
Published: June 2023

Проведено докладний аналіз методів та механізмів, за допомогою яких держава здійснює контроль за функціонуванням платіжних систем. Розглянуто основні регулюючі органи та методи регулювання, що використовуються ними для контролю та нагляду за платіжними системами країн, що входять до цих груп. Досліджено перспективи розвитку платіжних систем у світі. Правове регулювання відносин між суб'єктами платіжних систем у рамках реалізації їх прав та обов'язків забезпечує безперебійного функціонування платіжних систем, нагляд у сфері регулювання платіжних систем - це публічно-правова діяльність НБУ щодо здійснення зовнішньої перевірки, оцінки, вжиття передбачених законодавством заходів з метою дотримання учасниками вимог, встановлених законодавством.
The impact of academic staff union of universities’ strikes on Nigerian students
Authors: Nwanyanwu Dennis H. , Nkoro Emeka , Nwankwo Nneka Uchenna , Igbara Neeka 
Published: June 2023

The incessant strikes in Nigeria’s public and private sectors have become an issue of concern to scholars and policy-makers because industrial peace or conflict impacts the social, political, and economic activities of a nation. Therefore, this study examined the impact of Academic Staff Union of Universities (ASUU) strikes on students’ behavior in Nigeria using Choba as one of the host communities of the University of Port Harcourt, as a case study. The study employed a survey research design. A total of 400 questionnaires were administered and 370 were retrieved. Data was analyzed using descriptive statistics-mean computation and standard deviation. Findings from the study show that ASUU strikes have a high negative impact on students’ behavior. This indicates that students bear the brunt of ASUU strikes as manifested in increased students’ stay on campus, increased drug abuse among students, increased students’ involvement in kidnapping and financial crimes among students, and reduced students’ academic performance.
Keywords: ASUU; staff union; strike; students’ behavior; government; university.
Students' experiences with educational-ethical challenges
Authors: Valvi Parvaneh , Khazami Parvin , Hashemi Seyed Jalale , Moghaddam Masoud Safaei 
Published: June 2023

The purpose of this research is to investigate students' experience with educational-moral challenges. The research method is qualitative and phenomenological. The statistical population of this research included all female students of the second secondary level. The sample was selected purposefully and according to the available samples. Data saturation in the field of the educational-moral challenge of identity confusion was done after 14 interviews, communication challenge after 15 interviews, and existential anxiety challenge after 17 interviews. The three-step Ricoeur's method was used to analyze the interview data. Findings include 5 main themes and 16 sub-themes. The research shows that the educational-moral challenges of students are rooted in their untested assumptions and false beliefs. The analysis of the students' experience provides a clear picture of their perceptions about each of the challenges, and the discovery and interpretation of their speech shows that each experience has depth and breadth, and from each experience, we can reach the hidden things of the word.
Keywords: Challenge; education; ethics; morals; phenomenology.
Andrés García Inda, La dulce militancia. Crítica de la razón indignada
Authors: Vicente y Guerrero Guillermo 
Published: June 2023

Este artículo reseña: Andrés GARCÍA INDA, La dulce militancia. Crítica de la razón indignada,prólogo de Chaime Marcuello Servós, ediciones Mensajero, Bilbao, 2020, 167 pp.
RELATIVE ASSESSMENT OF THE COST OF RESERVATION OF RENEWABLE ENERGY SOURCES
Authors: Lezhniuk Petro , Komar Vyacheslav , Povstianko Kateryna 
Published: June 2023

The generation of electricity by solar and wind power plants depends on natural conditions, and therefore there are problems with their participation in the process of balancing the modes of electric power systems (EPS). It is difficult for them to carry out the forecasted and approved hourly generation schedule for the next day with the specified accuracy. The UES is forced to keep a capacity reserve to compensate for deviations of renewable energy sources (EPS) from the projected generation schedule. Since these deviations can be both larger and smaller than the permissible ones, it is by this criterion that we can choose and form a means to balance the EPS regimes. The paper proposes a method for researching backup measures of renewable energy sources with unstable generation in EPS. The criterion of optimality for comparing RES reservation methods is their relative costs
Among the ways of reserving RES, system reserve is generally used (mainly the maneuverable capacities of thermal and hydroelectric power plants), but since it is not enough, it is suggested to use other means of reserving power available today: electrochemical electricity storage, hydrogen and biogas technologies.
Mathematical models based on the theory of similarity and the criterion method have been developed to analyze the technical and economic efficiency of certain means of reservation. The criterion method is preferred due to the fact that, with minimal available initial information, it provides an opportunity to compare different methods of reserving RES generation and determine the optimal ones. The method makes it possible to assess their proportionality, as well as to determine the sensitivity of costs to the power of reservation methods.
Criterion models have been formed that make it possible to build the dependence of the costs and reserve means of variable RES generation on the capacity of the reserve means.. Such dependencies make it possible to more reasonably choose certain reservation methods at the first stage in accordance with the characteristics and requirements of the UES. They can be clarified if the price indicators that are valid at the moment and for the near future are known.