bluuebunny/crossref_metadata_2025 huggingface dataset:
Laser Improved NiTi Surface for Biomedical Applications
Authors: Racek Jan , Hauschwitz Petr , Bičišťová Radka , Brajer Jan , Huyhn Jaroslav , Minárik Peter
Published: May 2022

The surface structure of medical implants and their chemical state are extremely important for their lifetime and reliability. There are problems with the degradation of NiTi implants due to structural fatigue, localized tribo-corrosion, and inconsistent hemocompatibility. These issues potentially can be solved by surface texturing by controlled short laser pulse treatments with a multibeam approach explored in this study. One of the unique surface textures in nanoscale is represented by introducing laser induced periodic surface structures (LIPSS) into the implant surface. The LIPSS formation involves the excitation of surface plasmon polaritons and material surface reorganization. Ripples with periodicity less than 1 ?m along with the catalytic activity of oxide surface with "rutile nanohairs" can significantly reduce bacterial film adhesion while promoting surface endothelialization and hemocompatibility. The morphological texturing of the surface allows for tuning the wetting properties from extreme hydrophobicity to hydrophilicity. Reduction of friction and wear of material surfaces can be achieved by introducing textures that reduce the contact friction area. The geometry of the LIPSS and dimples maintains an adhesive film of liquid among moving parts. Short laser "beam-shaped" pulses were applied in this work to NiTi surfaces. The results indicate that LIPSS processing of NiTi surface with controlled height profiles and periodicity gives rise to chemisorbed hydrocarbon molecules on rutile oxide layer, which leads to super-hydrophobicity and a beneficial antibacterial effect. Ultrashort laser pulse micromachining does not affect the microstructure and martensitic phase transformation. The corrosion resistance of LIPSS textured NiTi surface is not degraded, and the process reduces friction area and maintains an adhesive film of liquid between the moving parts.
ESR-Study of the Proton Exchange with Aliphatic Amino Acids in Toluene
Authors:   Karagandy University of the name of academician E.A. Buketov, Stadnik I.L. , Abilkanova F.Zh. ,   Karagandy University of the name of academician E.A. Buketov, Kudryavtseva Ye.V. ,   Karagandy University of the name of academician E.A. Buketov, Nikolskiy S.N. ,   Karagandy University of the name of academician E.A. Buketov, Masalimov A.S. ,   Karagandy University of the name of academician E.A. Buketov
Published: May 2022

This paper presents the results of an ESR spectroscopic study of the intermolecular proton exchange kinetics with some isomers of aminocaproic acid, such as 2-aminohexanoic and 6-aminohexanoic acids in the toluene indifferent medium. A stable semiquinone radical, namely 3,6-di-tert-butyl-2-hydroxyphenoxyl, is used as a spin probe. The ESR spectra have been recorded on a RE-1306 spectrometer. The article provides the ob-tained dynamic spectra of the intermolecular proton exchange process. Modeling of the proton exchange ESR spectra has been carried out using a previously developed program, which is based on a four-jump model of this reaction and modified Bloch equations. The kinetic parameters of the process of acid-base interaction of the spin probe with amino acids and the activation barrier of the reaction have been estimated with a mini-mum error based on a comparison of the model spectra with the experimental ones. The obtained data have been analyzed and compared with previous studies. It has been found that the reaction rate of the intermo-lecular proton exchange between 3,6-di-tert-butyl-2-hydroxyphenoxy and studied aliphatic amino acids is comparable to the same with aliphatic carboxylic acids. Hoewever, in our case, there is an increase in the ac-tivation barrier, which apparently is associated with a negative effect on the intramolecular hydrogen bonding process between the amino and the carboxyl groups in the amino acid molecule.
Performance and Emissions Analysis of BE85-Gasoline Blends on Spark Ignition Engine
Authors: Nanlohy Hendry Y. , Riupassa Helen , Mini Marthina , Taba Herman Tjolleng , Katjo Basri , Nanulaitta Nevada JM , Yamaguchi Masaki
Published: May 2022

This study aims to reveal the performance and exhaust emissions of a spark ignition (SI) engine fueled by a gasoline-bioethanol mixture. The main performance characteristics of the SI engine tested are torque, power output; thermal efficiency, brake specific fuel consumption, and brake mean effective pressure. Meanwhile, the exhaust emissions seen are carbon monoxide and hydrocarbons. The test is carried out by comparing the performance of the SI engine under standard conditions without modification with gasoline fuel, with the SI engine with modification with 85% bioethanol fuel. The mass flow of fuel is regulated by modifying the carburetor choke at 3/4 and 7/8. The results show that although slightly lower than gasoline, in general, it can be seen that bioethanol can improve SI engine performance and produce environmentally friendly exhaust emissions.
Elemental, Thermal and Physicochemical Investigation of Novel Biodiesel from Wodyetia Bifurcata and Its Properties Optimization using Artificial Neural Network (ANN)
Authors: Kolakoti Aditya , Prasadarao Bobbili , Satyanarayana Katakam , Setiyo Muji , Köten Hasan , Raghu Metta
Published: May 2022

In this study, an unexplored oil from the wodyetia bifurcata fruit was used for biodiesel production. The transesterification process was implemented to convert the raw oil into wodyetia bifurcata methyl ester (WBME) and the influence of process variables on WBME yield was examined with the response surface method (RSM) assisted Box-Behnken optimization. The results of RSM show that a maximum biodiesel yield of 94.67% was achieved and reaction time was identified as an influencing process variable. The fatty acid composition (FAC) from chromatography reveals the presence of highly unsaturated in WBME and the significant fuel properties of thermal and molecular meet the required fuel standards (ASTM). The obtained fuel properties of WBME are compared with other popularly used biodiesels and observed low kinematic viscosity (3.87mm2/sec) and moderated cetane number (53) for WBME. Furthermore, artificial neural network (ANN) tools are used for the prediction of WBME yield and show an improvement of 0.4% than RSM and low mean square error and a high coefficient of correlation was observed for ANN.
Selectivity of the New Catalyst ZnO-MCM-48-CaO in Esterification of Calophyllum inophyllum Oil
Authors: Kolo La , Firdaus Firdaus , Taba Paulina , Zakir Muhammad , Soekamto Nunuk Hariani
Published: May 2022

The synthesis of MCM-48 containing surfactants (CTAB and Triton X-100), ZnO, and CaO aimed to find a potential heterogeneous catalyst in the esterification of Calophyllum inophyllum oil to biodiesel. This research is important in the production of biodiesel from vegetable oils with more than 2% free fatty acids (FFA), such as Calophyllum inophyllum oil using heterogeneous catalysts. Synthesis of heterogeneous catalysts, MCM-48 and ZnO-MCM-48-CaO (ZMC), using the hydrothermal method at various calcination temperatures was conducted to find the optimum calcination temperature for the reaction. The activity of the catalyst in the reaction was determined using acid-base titration methods and GC-MS. The MCM-48 catalyst calcined at 650 °C (MCM-48/650) had a catalytic activity of 35.74% and was selective for converting linoleic acid in Calophyllum inophyllum oil to biodiesel. In addition, this catalyst was also capable of cracking the compounds contained in Calophyllum inophyllum oil into suitable hydrocarbons for biodiesel. In the esterification of vegetable oils, four heterogeneous catalysts (MCM-48/550, ZMC/550, ZMC/650, and ZMC/750) had the potential to replace conventional catalysts (H2SO4), particularly in the generation of biodiesel from Calophyllum inophyllum oil.
Analysis of User’s Comfort on Automated Vehicle Riding Simulation using Subjective and Objective Measurements
Authors: Mohd Norzam Muhammad Nur Aliff , Karjanto Juffrizal , Md. Yusof Nidzamuddin , Hassan Muhammad Zahir , Hakim Zulkifli Abd Fathul , Ab Rashid Ahmad Azad
Published: May 2022

The naturalistic study investigated the potential influence of personal driving preferences (assertive and defensive driving style) on users; comfort when being driven in an automated vehicle with a defensive driving style. Adopted the Wizard of Oz design, the study involved three phases: pre-, during, and post-driven to measure their comfort, perceived safety, and likeness as well as motion sickness propensity through self-report questionnaire and heart rate variation. After answering a set of questionnaires, participants were exposed to simulated driving in an automated vehicle with a defensive driving style. A statistical analysis produced no statistically significant difference between assertive and defensive participants. This indicates an overall preference, perceived comfort without severe motion sickness propensity to the defensive driving style of the autonomous vehicle, regardless of participants’ personal driving styles.
Eurytemora caspica sp. nov. from the Caspian Sea – one more new species within the E. affinis complex (Copepoda: Calanoida: Temoridae)
Authors: Sukhikh N.M. , Alekseev V.R.
Published: May 2022

Eurytemora caspica sp. nov. (Crustacea: Temoridae) from the North part of the Caspian Sea and the delta of the Volga River is described. The new species belongs to the Asian clade of the Eurytemora affinis complex. This species is intermediate morphologically between the North-American and European species of the E. affinis- complex. E. caspica sp. nov. differs from nearest congeners by the shape of the mandible, absence of the seta segmentation on the caudal rami and on swimming legs, the shape of the genital double-somite and by the armament of the thoracic legs. E. caspica sp. nov. is possibly widely distributed along the North part of the Caspian Sea, as well as in the lower reaches of rivers flowing into this sea. The Japan fresh lakes are probably inhabited by undescribed species, very close morphologically to E. caspica sp. nov.
Six new species of the genus Metaphycus Mercet from Mexico (Hymenoptera: Encyrtidae)
Authors: Myartseva S.N.
Published: May 2022

Six new species of the encyrtid genus Metaphycus are described from Mexico: M. celticola sp. n., M. farfani sp. n., M. karwinskiae sp. n., M. sergueii sp. n., M. superbus sp. n., and M. tuxpan sp. n. All new species belong to insidiosus-group. The soft scale insect Differococcus argentinus (Morrison), the host of M. celticola, is recorded from Mexico for the first time.
A new bathypelagic copepod Pseudoamallothrix paralaminata sp. n. from the Arctic Basin and arguments for the transfer of Xanthocalanus soaresmoreirai Bjornberg, 1975 to the genus Pseudoamallothrix (Calanoida: Scolecitrichidae)
Authors: Vyshkvartzeva N.V.
Published: May 2022

Pseudoamallothrix paralaminata sp. n. is described from the Arctic Basin. The new species is very close to P. laminata (Farran, 1926) and O. profunda (Brodsky, 1950), but clearly differs from these in several characters of male and female. Xanthocalanus soaresmoreirai Bjornberg, 1975 described from male has a number of morphological features never observed in Xanthocalanus (fam. Phaennidae) but typical of the genus Pseudoamallothrix (fam. Scolecitrichidae); in some characters, this species is close to P. ovata (Farran, 1905). X. soaresmoreiraiis transfered to the genus Pseudoamallothrix (comb. n.). A transformation of setae on apical and subapical segments of the male maxilliped as a synapomorphic character for the family Scolecitrichidae is recorded for the first time.
Contribution to knowledge of the cockroach subfamilies Paranauphoetinae (stat. n.), Perisphaeriinae and Panesthiinae (Dictyoptera: Blaberidae)
Authors: Anisyutkin L.N.
Published: May 2022

The systematic position and phylogeny of the subfamilies Perisphaeriinae and Panesthiinae, and the genus Paranauphoeta Brunn. are discussed. The tribe Paranauphoetini Rehn, 1951 is raised in rank to subfamily. The genera Paranauphoeta, Trichoblatta Sauss. & Zehn., Glomerexis B.-Bien. and Perisphaerus Serv. are rediagnosed. A new species, T. beybienkoi sp. n., and a new subspecies, Paranauphoeta vicina vietnamensis ssp. n., are described. For T. valida B.-Bien., Perisphaerus semilunatus Han. and P. punctatus B.-Bien., the male is described for the first time. For Paranauphoeta nigra B.-Bien., P. indica Sauss. & Zehn., P. vicina Brunn., P. v. sinica B.-Bien., P. lyrata (Burm.), P. rufipes Brunn., P. formosana Mats., T. magnifica (Shelf.), T. aerea B.-Bien., T. fallax B.-Bien., T. montshadskii B.-Bien., T. semisulcata (Han.), T. valida, T. v. moderata B.-Bien., T. sculpta (B.-Bien.), T. tarsalis (Walk.), T. humbertiana (Sauss.), T. pilosa (B.-Bien.), G. tibetana B.-Bien., Perisphaerus semilunatus, and P. punctatus, data on the morphology and geographical distribution are given.
Irresponsabilité et résipiscence
Authors: El Mawla Batoul , El Akremi Assâad , Igalens Jacques
Published: May 2022

L’objectif de cet article est de montrer que les allégations d’irresponsabilité sociale des entreprises entraînent deux types de réactions : la résipiscence individuelle – des entreprises individuelles apportant des améliorations locales « ponctuelles » ou mettant en œuvre des améliorations plus larges liées au domaine particulier de la controverse – et la disciplinarisation du secteur – des mesures compensatoires prises par d’autres entreprises du secteur qui ne sont pas directement visées par l’allégation. Les auteurs testent leurs prédictions théoriques à l’aide d’une modélisation linéaire hiérarchique et d’un échantillon de 1 803 entreprises de 2002 à 2014 provenant du Thomson Reuters Responsibility Ratings.
Case Study
Authors: Loeffler Reinhold L.
Published: May 2022

In my book Islam in Practice (1988), I showed the great variety of religious beliefs in Sisakht, a village of Luri-speaking tribal people in the province of Kohgiluye/Boir Ahmad in Iran.1 I gave one of the 21 men I presented, Mr. Husseinkhan Sayadi, the epithet ‘Deep Believer’ to reflect his firm belief in God and Shi’a traditions. We became close friends, and revisiting his life again 14 years after his death, I will continue to use his first name to reflect and honour our friendship.
An Opinion Survey about Public Perception Regarding Transgender People in Pakistan
Authors: Ansari Abid Mehmood , Yasmeen Bushra
Published: May 2022

The present study strived to explore the existing beliefs and perceptions of public regarding transgender people in Pakistani society. The major objectives of this study were to explore the perception of the general public about transgender and how they differentiate among men, women, and transgender people. The present study was quantitative survey research. By using simple random, 50 respondents were interviewed,followed by an interview schedule. The gathered data were processed and analyzed in descriptive manners. The study revealed that (100 Percent) of the respondents were familiar with transgender people as (82 Percent) met transgender in the street/roadside while beggaring. The present study also revealed that (78 Percent) of respondents perceived transgender as an in-between creature as they differentiated that transgender is male persons who adopted this disguise for attaining sexual attractions by other male persons/purposes (60 Percent). It was also suggested that transgender should be given education, healthcare, and employment opportunities (100 Percent).
Виробничий роман як текст масової літератури доби соцреалізму
Authors: Журба С. С.
Published: May 2022

Стаття присвячена спробі дослідження виробничого роману як тексту масової літератури доби соцреалізму. Основна увага звертається на риторичність, ідеологічне спрямування, публіцистичність, культивування теми робітничого класу та індустріалізації нового суспільства у творах цього жанру.
Жанрові модифікації роману «Вільний світ» Т. Белімової
Authors: Журба С. С.
Published: May 2022

У статті досліджено жанрову своєрідність твору Тетяни Белімової «Вільний світ». Вказано, що своєрідність авторського художнього мислення реалізується через модифікацію жанру: роман-хроніка, роман-сімейна сага, роман-спогад, роман-пам'ять. Зроблено спробу простежити метафору «вільного світу» через образи персонажів та на історіософському рівні.
Становлення традицій класичного танцю на Криворіжжі
Authors: Крилова Олександра Михайлівна
Published: May 2022

Класична хореографія стала яскравою сторінкою культури Кривого Рогу, починаючи з 60-х років ХХ ст. Велику роль мало загальне економічне піднесення міста, протегування мистецтву з боку владних структур, інтерес до масових видовищних дійств. Активізація хореографічного життя в місті потребувала видатних особистостей, фундаторів місцевих шкіл, якими стали Т. Паршина, Т. Брисіна та ін. Вони сприяли організації хореографічної освіти, стояли біля витоків перших професійних навчальних закладів і хореографічних гуртків у місті. Класична хореографія зайняла належне місце у виставах державного академічного театру драми і музичної комедії ім. Т. Г. Шевченка. На основі класичної хореографії виросли численні осередки інших хореографічних напрямів.
Наукові підходи як теоретико-методологічне підґрунтя педагогічних досліджень
Authors: Ракітянська Людмила Миколаївна
Published: May 2022

У статті досліджуються наукові підходи як теоретико-методологічне підґрунтя педагогічних досліджень.
The Use of ICT in the Flip Teaching of Future Mathematics Teachers
Authors: Hodovaniuk Tetiana , Makhometa Tetiana , Tiahai Irina , Medvedieva Mariia , Pryshchepa Svitlana
Published: May 2022

The article highlights possibilities of ICT in the implementation of the “flipped learning” technology in the professional training of future mathe- matics teachers. Flipped learning technology has been analyzed as a mixed learning model that has a different look at the organization of the educational process. The model of realization of “flipped learning” using ICT while study- ing the topic “Functions” in the course “Elementary mathematics” is developed. Given examples of the use of interactive learning technologies based on the use of modern information and communication technologies, including cloud and mobile. The lesson scheme of training on the technology “flipped learning” is described in detail using the system of Moodle, a shared virtual board, the use of QR codes during interactive technology “Bingo”. The peculiarities of using the Mentimeter online resource to conduct student surveys during reflection are disclosed. The results of student survey are analyzed and presented regarding the expediency of using this technology in future professional activity. It is es- tablished that the use of innovative teaching technologies in the process of professional training of future mathematics teachers contributes to the students’ awareness of the need to create and use of educational areas, which should be- come a powerful tool for students to develop critical thinking, self-disclosure of creative abilities, research skills, self-knowledge.
Providing the Fundamentalisation of Operations Research Learning Using MAXIMA System
Authors: Kohut Uliana , Shyshkina Mariya
Published: May 2022

In the article, the problems of using the systems of computer mathe- matics (SCM) as a tool to provide the fundamental component of operations re- search learning and students research activities support are considered. The role of SCM in the process of bachelors of informatics training and special aspects of pedagogical applications of these systems in the “Operations research” study is defined. The analysis of the basic concepts of the fundamentalisation of educa- tion and in particular the basic concepts of the fundamentalisation of informatics disciplines learning is summarized. The attempt to distinguish explicitly and specify the fundamental concepts in the content of “Operation research” learning is made. The method of “Operation research” study using Maxima system as a tool to support the basic concepts learning and an investigation is approved. The results of the pedagogical experiment on MAXIMA application to support the fundamental component of learning in the course of “Operation research” study and the analysis of its results are reported.
Experience in the Use of Mobile Technologies as a Physics Learning Method
Authors: Goncharenko Tatiana , Yermakova-Cherchenko Nataliia , Anedchenko Yelyzaveta
Published: May 2022

Swift changes in society, related to sciences technicians’ development, technologies, by the increase of general volume of information, pull out new requirements for maintenance, structure, and quality of education. It requires teachers to diversify a tool in the direction of the increase in possibilities of the use of mobile technologies and computer systems. Lately in the world, more attention spared to the use of mobile learning, which in obedience to «Recommendations of UNESCO on the questions of a policy in the area of mobile learning» foresees the use of mobile technology, both separate and together with other by informational computer technologies. [1]. Mobile learning allows using the open informational systems, global educational networks, unique digital resources which belong to different educational establishments and co-operate with each other. The use of existent educational resources and creation of own, based on the academic resources from informative space, allows to promote the interest of students to the study of physics, to take into account the individual features, and also features of region and framework of society of the country. During the last years in Ukraine competency-based approach to the organization of studies certainly one of basic. The new Education Act addresses the key competencies that every modern person needs for a successful life, including mathematical competence; competence in natural sciences, engineering, and technology; innovation; information and communication competence [2]. This further emphasizes the importance of providing students with quality physical education and the problems associated with it. Using mobile technology in professional teaching work, the teacher has the opportunity to implement the basic principles of the competence approach in teaching physics. An analysis of the data provided in the official reports of the Ukrainian Center for Educational Quality Assessment showed that the number of students making an external independent assessment in physics and choosing a future profession related to physics has decreased significantly. This is due to the loss of students' interest in physics and the complexity of the content of the subject, as well as the increase in the amount of information that students need to absorb. In this article, we explore the possibilities of mobile technology as a means of teaching physics students and give our own experience of using mobile technology in the process of teaching physics (for example, the optics section in primary school).
Scenario forecasting information transparency of subjects' under uncertainty and development of the knowledge economy
Authors: Kucherova Hanna , Didenko Anastasiia , Kravets Olena , Honcharenko Yuliia , Uchitel Aleksandr
Published: May 2022

Topicality of modeling information transparency is determined by the influence it has on the effectiveness of management decisions made by an economic entity in the context of uncertainty and information asymmetry. It has been found that information transparency is a poorly structured category which acts as a qualitative characteristic of information and at certain levels forms an additional spectrum of properties of the information that has been adequately perceived or processed. As a result of structuring knowledge about the factor environment, a fuzzy cognitive model of information transparency was constructed in the form of a weighted digraph. Structural analysis and scenario forecasting of optimal alternatives of the fuzzy cognitive model made it possible to evaluate the classes of factors, identify their limited relations, establish the centrality of the roles of information transparency and information and communication security in the system built and evaluate their importance when modeling the situation self-development. Information visibility, reliability and availability have been found to have the strongest impact on the system. Taking into account different initial weights of the key factors — information transparency and information and communication security — the study substantiates the strategic ways for economic entities to achieve their goals in the context of uncertainty and information asymmetry, which allows us to use this approach as a tool for strategic management in the information environment.
Fuzzy cluster analysis of indicators for assessing the potential of recreational forest use
Authors: Kryzhanivs'kyi Evstakhii , Horal Liliana , Perevozova Iryna , Shyiko Vira , Mykytiuk Nataliia , Berlous Maria
Published: May 2022

Cluster analysis of the efficiency of the recreational forest use of the region by separate components of the recreational forest use potential is provided in the article. The main stages of the cluster analysis of the recreational forest use level based on the predetermined components were determined. Among the agglomerative methods of cluster analysis, intended for grouping and combining the objects of study, it is common to distinguish the three most common types: the hierarchical method or the method of tree clustering; the K-means Clustering Method and the two-step aggregation method. For the correct selection of clusters, a comparative analysis of several methods was performed: arithmetic mean ranks, hierarchical methods followed by dendrogram construction, K- means method, which refers to reference methods, in which the number of groups is specified by the user. The cluster analysis of forestries by twenty analytical grounds was not proved by analysis of variance, so the re-clustering of certain objects was carried out according to the nine most significant analytical features. As a result, the forestry was clustered into four clusters. The conducted cluster analysis with the use of different methods allows us to state that their combination helps to select reasonable groupings, clearly illustrate the clustering procedure and rank the obtained forestry clusters.
Comparative analysis of the attractiveness of investment instruments based on the analysis of market dynamics
Authors: Maksyshko Nataliia , Vasylieva Oksana , Kozin Igor , Perepelitsa Vitalii
Published: May 2022

The article continues the authors' research on solving the problem of choosing the most attractive investment instrument from a variety of alternatives, based on a comparative analysis of the dynamics for the respective markets. The nature of the dynamics affects the predictability level of the investor's income and is determined by finding out which hypothesis corresponds to the dynamics: the efficient market hypothesis, the fractal market hypothesis and the coherent market hypothesis. The methodology of comparative analysis developed by the authors is based on the use of statistical analysis methods combined with the methods of complex fractal analysis. It makes it possible to reveal the presence of deterministic chaos in the dynamics and to obtain estimates of the long-term memory in time series. The calculated characteristics of the fuzzy set of the memory depth for time series make it possible to draw conclusions about the financial instruments preference for the investor. The methodology developed by the authors is applied to three markets. A comparative analysis of three instruments (gold, EUR/USD currency pair and Bitcoin cryptocurrency) was carried out. The dynamics of prices and profitability for financial instruments in the conditions before the onset of the COVID-19 crisis and during it is considered.
Assessment of bank's financial security levels based on a comprehensive index using information technology
Authors: Khrushch Nila , Hryhoruk Pavlo , Hovorushchenko Tetiana , Lysenko Sergii , Prystupa Liudmyla , Vahanova Liudmyla
Published: May 2022

The article considers the issues of assessing the level of financial security of the bank. An analysis of existing approaches to solving this problem. A scientific and methodological approach based on the application of comprehensive assessment technology is proposed. The computational algorithm is presented in the form of a four-stage procedure, which contains the identification of the initial data set, their normalization, calculation of the partial composite indexes, and a comprehensive index of financial security. Results have interpretation. Determining the levels of financial security and the limits of the relevant integrated indicator is based on the analysis of the configuration of objects in the two-scale space of partial composite indexes, which is based on the division of the set of initial indicators by content characteristics. The results of the grouping generally coincided with the results of the banks ranking according to the rating assessment of their stability, presented in official statistics. The article presents the practical implementation of the proposed computational procedure. To automate calculations and the possibility of scenario modeling, an electronic form of a spreadsheet was created with the help of form controls. The obtained results allowed us to identify the number of levels of financial security and their boundaries.
Predicting the economic efficiency of the business model of an industrial enterprise using machine learning methods
Authors: Horal Liliana , Khvostina Inesa , Reznik Nadiia , Shyiko Vira , Yashcheritsyna Natalia , Korol Svitlana , Zaselskiy Vladimir
Published: May 2022

The paper considers the problem of studying the impact of key determinants on the industrial enterprise business model economic efficiency and aims to build an optimal model for predicting the industrial enterprise business model effectiveness using neural boundaries. A system of key determinants key factors has been developed. Significant factors were later used to build neural networks that characterize the studied resultant trait development vector. The procedure for constructing neural networks was performed in the STATISTICA Neural Networks environment. As input parameters, according to the previous analysis, 6 key factor indicators were selected. The initial parameter is determined by economic efficiency. According to the results of the neural network analysis, 100 neural networks were tested and the top 5 were saved. The following types of neural network architectures, multilayer perceptron, generalized regression network and linear network were used. Based on the results of the neural network modeling, 5 multilayer perceptrons of neural network architectures were proposed. According to descriptive statistics, the best model was a multilayer perceptron, with the MLP 6-10-1 architecture, which identifies a model with 6 input variables, one output variable and one hidden layer containing 10 hidden neurons. According to the analysis of the sensitivity of the network to input variables, it was determined that the network is the most sensitive to the variable the share of electricity costs in total costs. According to the results of selected neural networks standard prediction, the hypothesis of the best neural network was confirmed as Absolute res., Squared res, Std. Res for the neural network MLP 6-10-1 reached the optimal value and indicate that the selected model really has small residues, which indicates a fairly high accuracy of the forecast when using it.
До проблеми визначення національних форм українського образотворчого мистецтва: дослідження іконопису козацької доби в працях науковців початку ХХ століття
Authors: Удріс Ірина Миколаївна
Published: May 2022

В сучасній вітчизняній науці про мистецтво потребує ґрунтовного науково-теоретичного висвітлення й узагальнення проблема формування системних знань щодо національних форм нашої образотворчості, в тому числі – сакрального живопису як провідного напрямку розвитку українського мистецтва на різних етапах його історії та важливої складової формування наукового мистецтвознавства. Статтю присвячено висвітленню процесу становлення концепції еволюції національних форм українського іконопису козацької доби в працях фахівців початку ХХ ст. Методологія дослідження базується на комплексному історико-культурному підході, системному методі, синхроністичному аналізі публікацій одного часового проміжку, структурному аналізі. Означена методологія дозволяє розглянути питання поетапного формування наукових поглядів щодо національних особливостей і напрямку еволюції українського іконопису названого періоду в контексті розвитку європейського стилю бароко як цілісної концепції.
On the possibility of reducing man-made burden on benthic biotic communities when mining solid minerals using technical means of various designs
Authors: Sudarikov Sergei , Yungmeister Dmitrii , Korolev Roman , Petrov Vladimir
Published: May 2022

The paper analyses features of the species composition and diversity of biotic communities living within the ferromanganese nodule fields (the Clarion-Clipperton field), cobalt-manganese crusts (the Magellan Seamounts) and deep-sea polymetallic sulphides (the Ashadze-1, Ashadze-2, Logatchev and Krasnov fields) in the Russian exploration areas of the Pacific and Atlantic Oceans. Prospects of mining solid minerals of the world’s oceans with the least possible damage to the marine ecosystems are considered that cover formation of the sediment plumes and roiling of significant volumes of water as a result of collecting the minerals as well as conservation of the hydrothermal fauna and microbiota, including in the impact zone of high temperature hydrothermal vents. Different concepts and layout options for deep-water mining complexes (the Indian and Japanese concepts as well as those of the Nautilus Minerals and Saint Petersburg Mining University) are examined with respect to their operational efficiency. The main types of mechanisms that are part of the complexes are identified and assessed based on the defined priorities that include the ecological aspect, i.e. the impact on the seabed environment; manufacturing and operating costs; and specific energy consumption, i.e. the technical and economic indicators. The presented morphological analysis gave grounds to justify the layout of a deep-sea minerals collecting unit, i.e. a device with suction chambers and a grip arm walking gear, selected based on the environmental key priority. Pilot experimental studies of physical and mechanical properties of cobalt-manganese crust samples were performed through application of bilateral axial force using spherical balls (indenters) and producing a rock strength passport to assess further results of the experimental studies. Experimental destructive tests of the cobalt-manganese crust by impact and cutting were carried out to determine the impact load and axial cutting force required for implementation of the collecting system that uses a clamshell-type effector with a built-in impactor.
First record of a tropical shallow water barnacle Tetraclita sp.
(Cirripedia: Tetraclitoidea)
from the middle Neogene of the Canary islands
Authors: Martín Hernández Esther , Buckerige John , Castillo Carolina , García Talavera Francisco
Published: May 2022

This paper describes the first record of the intertidal, tropical
tetraclitoid barnacle Tetraclita sp. cf. T. stalactifera (Lamarck, 1818) from
the middle Neogene of the Canary Islands. The barnacles were recovered as
isolated plates from a bioclastic volcanic agglomerate. Associated fauna includes patellid and neritid gastropods, and an oyster bank, which confirm a
shallow-water litoral setting. Living Tetraclita stalactifera is recorded from
tropical waters of the America, South Africa and the Arabian Sea; it is first
recorded as fossil from Plio-Pleistocene of Curaçao (Caribbean Sea,
Venezuela).
Heightened Tameness and Accelerated Handling-Habituation in 3×Tg-AD Mice on a B6;129 Genetic Background
Authors: Hu Wen , Dai Chun-Ling , Niu Jiahui , Iqbal Khalid
Published: May 2022

Background:

The triple transgenic mouse model of Alzheimer’s disease (3×Tg-AD) has gained popularity in Alzheimer’s research owing to the progressive development of both amyloid- β and tau pathologies in its brain. Prior handling-habituation, a necessary preparation procedure that reduces anxiety and stress in rodents, was seldom described in the literature involving these mice and needs to be addressed.

Objective:

We sought to determine whether 3×Tg-AD mice differ from B6;129 genetic control mice in terms of tameness and prior habituation to handling.

Methods:

We devised hand-staying and hand-boarding assays to evaluate tameness in 3×Tg-AD and B6;129 genetic control mice at 2.5, 7, and 11.5 months of age, representing cognitively pre-symptomatic, early symptomatic and advanced symptomatic stages of the disease, respectively. We monitored the progress of handling-habituation across 8–15 daily handling sessions and assessed the animal behaviors in elevated plus maze.

Results:

We found that 3×Tg-AD mice were markedly tamer than age-matched control mice at the baseline. Whereas it took 2–3 days for 3×Tg-AD mice to reach the criteria for full tameness, it took an average of 7–9 days for young genetic control mice to do so. Prior handling-habituation enhanced risk assessment and coping strategy in mice in elevated plus maze. Completely handling-habituated mice exhibited comparable anxiety indices in the maze regardless of genotype and age.

Conclusion:

These findings collectively point to inherently heightened tameness and accelerated handling-habituation in 3×Tg-AD mice on a B6;129 genetic background. These traits should be carefully considered when behaviors are compared between 3×Tg-AD and the genetic control mice.
Fuzzy multi-agent assistance system for elderly care based on user engagement
Authors: Rojas-Domínguez Alfonso , Lino-Ramírez Carlos , Gutiérrez-Hernández David , Puga Héctor , Zamudio Víctor
Published: May 2022

An intelligent system intended to provide assistance to an elderly user in their home is presented. This multi-agent system is designed to monitor the interaction between the user and other agents, and regulate itself based on the estimated level of mental engagement of the user in order to contribute to help them maintain adequate levels of awareness and interaction with their home environment. The agents are devices programmed to preserve the security, comfort and health of the user, who is also conceptualized as one of the agents in the system. The user engagement level is estimated through fuzzy inference, that is, by means of a set of fuzzy membership functions and rules applied over the interaction of the user with different categories of agents. The system incorporates several dozen agents and is tested using two different datasets of real interactions between users and devices in their home environments. A uniform parameter configuration yielded very positive results for diverse scenarios and subsequently the parameters of the system were automatically optimized to show that improved performance, in the form of a more efficient system regulation and increased certainty in adjustment estimation, is obtained.
The Effect of Toxoplasmosis on Pregnant Women and Its Diagnosis by “VIDAS Test of IgG Avidity”
Authors: Farman Meena S. , Akoul Marwa A.
Published: May 2022

Toxoplasmosis is well known as a cause of infection in pregnant women. Although many serological methods are available, diagnosis of early Toxoplasmosis may be extremely difficult. Toxoplasmosis is typically diagnosed during pregnancy via testing of maternal serum for IgM and IgG anti-Toxoplasma antibodies. Toxoplasmosis is normally asymptomatic, but it can have serious effects in immune-deficient individuals. Because avidity increases over time during infection, determining specific IgG avidity allows for more precise dating. Long-term IgM persistence makes it difficult to distinguish between acute and chronic infection. Seventy-six women were tested for VIDAS lgM, lgG antibodies, and VIDAS toxo-IgG avidity during the first 16 weeks of pregnancy. Low avidity antibodies were found in two (33.3%) of the six IgM-positive sera and four (11.11%) of the IgG-positive sera. Low avidity was noticed in 2 (3.27%) of the 61 sera that were negative for IgM. The low avidity indicates a recent infection, whereas high avidity in 4 (50%) of the 6 positive IgM and 24 (74.74%) of the 33 positive IgG indicates a long-ago infection. These conclusions emphasise the importance of using “VIDAS IgG avidity” in conjunction with the VIDAS IgM and IgG assays to offer to prove the presence of acute infection from a single serum sample for pregnant women.
Water Quality Assessment Using Multivariate Statistical Techniques: A Case Study of Devika Stream of Udhampur District in Lower Shivalik Region
Authors: Kumar Monu , Gautam Sandeep Kumar , Jha Pawan Kumar , Atri Romesh Kumar , Kumar Sanjeev , Tiwari Jaya
Published: May 2022

Our knowledge of the water quality of small mountainous water streams (rivulets) is based on very limited data; therefore, the current study has been carried out to assess the impact of human activities on the water quality of ‘Devika’ stream, a rivulet flowing through Udhampur district of Jammu and Kashmir by following physico-chemical parameters, such as temperature, pH, EC, hardness, major anions and major cations. The Piper diagram showed that 30% of water samples belonged to the Ca2+ type, whereas 70% of the remaining samples were in no dominant cation facies. Similarly, for anions, 50% of samples were categorised into Cl- type, 30% in no dominant type, 20% HCO3- type, therefore, facies classification indicated that maximum samples were CaCl2 type. The indices Na%, sodium adsorption ratio (SAR), permeability index (PI), magnesium hazard (MH) and residual sodium carbonate (RSC) were applied to check the appropriateness of water for the irrigation purpose and their average value was found to be 24.19, 0.75, 47, 48.06, and 1.12 meq/L, respectively. These values revealed that despite various human activities, all the water samples were found suitable for irrigation purposes.
Study Significance of Low Plasma Homocysteine or Hypohomocysteinemia and Some Parameter to Syndrome Associated with COVID-19 in Basrah City, Iraq
Authors: Salman Mohammed Salam , Alassadi Iqbal J. , Alasadi Ahmed K.
Published: May 2022

The increasing interdependence between the countries of the world has led to an increase in the risks faced by societies in general. The COVID-19 pandemic, for example, has transcended national borders, affecting people regardless of nationality, level of education, income or gender. As for its consequences, it has affected the most vulnerable groups. In this study, we have considered the significance of low plasma homocysteine or hypohomocysteinemia and some parameters of the syndrome associated with COVID-19. Just as an increase in the level of homocysteine in plasma has a negative effect on the heart and blood vessels, its decrease may put the health of those who suffer from it at risk. Homocysteine is known to be the natural mediator of the conversion of methionine to cysteine; hence, the danger, as the latter is necessary for the production of glutathione, taurine and sulphate. In this study, homocysteine and some indicators of COVID-19 syndrome were examined using ELISA kit and other methods. The homocysteine level in the serum of people who recovered from COVID-19 was found to be lower than in normal and healthy people. Thus, it indicates that people who have been cured may suffer from hypohomocystinemia. We also study some parameters, such as ALP, GOT, GPT, Glucose level and HDL, cholesterol. The results showed a significant decrease in the level of GOT enzyme and HDL level.
Research on passive interference of UHV transmission lines based on tower modeling
Authors: Zhou Xiaoyan , Zhang Xiumin , Jiao Chaoqun , Zhang Jiangong , Gan Zheyuan
Published: May 2022

At present, a large number of high-voltage transmission lines have gradually become a key factor that interferes with the quality of surrounding radio communications. In the study of passive interference of transmission lines, the modeling of iron towers affects the accuracy of calculation results. In order to provide reliable data reference for the research of protective measures and interference suppression methods, aiming at the line model of transmission line tower, taking the tower structure and auxiliary angle-steel as variable factors, this paper studies its influence on the calculation results of passive interference. Three tower models with typical structures and obvious differences are selected, and the models using only the main material and the auxiliary material angle-steel are established respectively. The calculation results of passive interference under different frequency incident waves are compared. The final conclusion shows that with the increase of incident wave frequency, the passive interference caused by the three transmission tower models increases gradually, and the effect of auxiliary angle-steel is more and more obvious.
On the generalized law of O-conditionality for interval fuzzy implications
Authors: Zhao Yifan
Published: May 2022

Interval fuzzy implications play an important role in both theoretical and applied communities of interval-valued fuzzy sets and have been widely studied. Recently, Dimuro et al. analyzed the law of O-conditionality for fuzzy implications in general. However, there is no corresponding researches about the interval extension. To fill the gap, in this paper, we introduce the generalized law of O-conditionality 𝕆 ( X ,   𝕀 ( X ,   Y ) ) ≤ Y (GOC), where 𝕀 is an interval fuzzy implication and 𝕆 is an interval overlap function. Meanwhile, we discuss the advantages one may get using it. Moreover, we consider the conditional antecedent boundary condition (CABC) for interval fuzzy implications derived from interval overlap and grouping functions, including, interval R 𝕆 - ,   ( 𝔾 ,   ℕ ) - ,   ( 𝕆 ,   𝔾 ,   ℕ ) - and ( 𝔾 ,   𝕆 ,   ℕ ) - implications. Finally, we further analyze the generalized law of O-conditionality for these four classes of interval fuzzy implications.
Uncertain minimax mean-variance and mean-semivariance models for portfolio selection1
Authors: Zhou Xiaoguang , He Xin , Huang Xiaoxia
Published: May 2022

Traditionally, the return on investment has been described as either a random variable or a fuzzy variable, while this paper discusses the uncertain portfolio selection in which each security return is assumed to be an uncertain variable. To better optimize the return and risk of a portfolio, we propose two models: uncertain minimax mean-variance (UM-EV) model and uncertain minimax mean-semivariance (UM-SVE) model. The crisp equivalents of the UM-EV model that regard the security return as a normal and linear uncertain variable are derived, and the optimization problem is solved using linear programming. For the UM-SVE model, the crisp equivalent of a zigzag uncertain variable is introduced, and the optimization solution is calculated using hybrid intelligent algorithm. Finally, the effectiveness of the proposed models is illustrated using numerical examples.